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Artigos de revistas sobre o tema "Portal frame method"

Autor: Grafiati

Publicado: 7 de junho de 2025

Última modificação: 2 de agosto de 2025

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1

R., H. Mohankar*, Imran Alam Md., Gaurav Gopesh, and Choudhary Shubham. "A STUDY OF PORTAL FRAME USING ANALYTICAL METHODS AND ETABS SOFTWARE." INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY 5, no. 3 (2016): 835–40. https://doi.org/10.5281/zenodo.48372.

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Analysis of portal frames involves lot of complications and tedious calculations by conventional methods. To carry out such analysis is a time consuming task. The Moment Distribution Method & Slope Deflection Method for analysis of portal frames can be handy in approximate and quick analysis so as to get the detailed estimates ready. In this work, these two methods have been applied only for vertical loading conditions. This paper mainly deals with the comparative analysis of the results obtained from the analysis of single bay portal frame when analyzed manually and using ETABS Software s

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2

Chen, Xu, and Hui Min Li. "The Alculation Method of Stable Bearing Capacity of Portal Frame." Applied Mechanics and Materials 351-352 (August 2013): 329–36. http://dx.doi.org/10.4028/www.scientific.net/amm.351-352.329.

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In recent years, the portal frame structure in the actual project has been widely used, but using the finite element method calculation of stable bearing capacity of portal frame is more complex, and very difficult to the design and construction personnel. With the known stability of the cantilever column carrying capacity and the vertex of the lateral displacement under concentrated force, the establishment of the ratio of the portal frame stability capacity and the stability of the cantilever column carrying capacity both in the same concentrated force vertex lateral displacement than the re

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3

Faridmehr, Iman, Mahmood Md Tahir, Tom Lahmer, and Mohd Hanim Osman. "Seismic Performance of Steel Frames with Semirigid Connections." Journal of Engineering 2017 (2017): 1–10. http://dx.doi.org/10.1155/2017/5284247.

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The nonlinear stiffness matrix method was incorporated to investigate the structural performance of steel portal frames with semirigid connections. A portal frame with unstiffened extended end-plate connection was designed to demonstrate the adequacy of the proposed method. Besides, the seismic performance of steel portal frames with semirigid connections was investigated through time history analysis where kinematic hysteresis model was assigned to semirigid connections to account for energy dissipation and unloading stiffness. Based on the results of the study, it was found that generally se

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4

BASAGA, H. B., M. E. KARTAL, and A. BAYRAKTAR. "RELIABILITY ANALYSIS OF STEEL BRACED REINFORCED CONCRETE FRAMES WITH SEMI-RIGID CONNECTIONS." International Journal of Structural Stability and Dynamics 12, no. 05 (2012): 1250037. http://dx.doi.org/10.1142/s021945541250037x.

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This paper presents the reliability analysis of the frame structures with semi-rigid connections. For this purpose, the SEMIFEM finite element program that is capable of dealing with the semi-rigid connections is coded in FORTRAN. Then, this program is connected to the reliability algorithm. The direct coupling method, which is a combination of the reliability method and finite element method, is utilized to determine the reliability indexes and probabilities of failure for the structure. The first order reliability method (FORM) is the one favored in the present reliability analysis. Two sets

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5

Far, Harry, and Claire Far. "Timber Portal Frames vs Timber Truss-Based Systems for Residential Buildings." Advances in Civil Engineering 2019 (July 28, 2019): 1–7. http://dx.doi.org/10.1155/2019/9047679.

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A large number of structures have been built during or after the construction of a house or residential-zoned building, which are not built at the same time and/or integrally with the structural integrity of the residential dwelling. These include carports, pergolas, sheds, and barns. The typical method of constructing these structures is a general timber truss and column system. The aim of this study is to look at the feasibility and economic incentive that may be gained from using a timber portal frame system, similar to the steel or timber portal frames used for larger industrial constructi

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6

Liu, Feng, and Xiao Yan Wang. "Overall Reliability Assessment of Portal Frame Structure with Roof Beam Outward Offset." Applied Mechanics and Materials 501-504 (January 2014): 628–33. http://dx.doi.org/10.4028/www.scientific.net/amm.501-504.628.

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This article deals with the condition that the roof beams of portal frame are outward offset beyond the standard limit, determines the most unfavorable position of the portal frame structure under the load and establishes the criterion standard of structural failure based on the space overall finite element analysis. It adopts Monte-Carlo method in reliability analysis methods to realize the overall reliability analysis of the portal frame structure with the roof beam outward offset. Analysis shows that the actual structure is at safe state under the design load and the reliability conforms to

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7

Xie, Ming, Fangbo Xu, Zhangdong Wang, et al. "Investigating Fire Collapse Early Warning Systems for Portal Frames." Buildings 15, no. 2 (2025): 296. https://doi.org/10.3390/buildings15020296.

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In recent years, firefighter accidents and people injured by the collapse of steel structures during a fire have occurred frequently, which has attracted the attention of the National Emergency Management Department and the Fire and Rescue Bureau. It is urgent to carry out research on early warning systems for building collapse during a fire. Existing early warning methods mainly use characteristic parameters such as temperature, vibration, and structural deformation. Due to the complexity of an actual fire, it is difficult to accurately predict the critical temperature of fire−induced instabi

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8

Jia, Wen Wen, and Deng Feng Wang. "Internal Force Evaluation of Non-Uniform Beam in Portal Frame." Applied Mechanics and Materials 423-426 (September 2013): 1454–58. http://dx.doi.org/10.4028/www.scientific.net/amm.423-426.1454.

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To simplify the internal force evaluation of portal frame being composed of non-uniform members, the force method was used to solve internal force of every key section of the non-uniform beam in portal frame with single-span. Gauss numerical integration method was used to simplify the complex integration when the deformation energy was calculated. Under the precondition of satisfied accuracy, the direct expressions of bending momentshear force and axial force of every key section of beam were obtained. The research work can be used as reference for the evaluation and design of portal frame mem

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9

Sabbagh-Yazdi, Saeed-Reza, and Ainullah Mirzazadah. "Comparing Numerical Results for Seismic Performance of Portal Steel Frames Braced with Steel: HSS Brace, Glulam Timber Brace, and Timber-Steel-BRB." Advances in Civil Engineering 2022 (July 20, 2022): 1–17. http://dx.doi.org/10.1155/2022/2705691.

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This study involves the application of timber-based bracings elements. For this purpose, seismic analyses are performed on special portal steel frames without the brace and diagonally braced with Glued Laminated Timber (glulam) and Timber-Steel Buckling Restrained Brace (TS-BRB), and the results are compared with the same configuration using steel Hollow Structural Sections (HSS) bracing, using OpenSees structural analyzer. First, to verify the accuracy of the modeling, the numerical results are compared with experimental measurements on several types of elements: (a) diagonally braced frame w

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10

S. J. Modak, S. J. Modak. "Determination of Influence Lines of a Portal Frame Adopting Matrix Method of Structural Analysis." Indian Journal of Applied Research 3, no. 7 (2011): 224–26. http://dx.doi.org/10.15373/2249555x/july2013/70.

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11

Dadra, Sarpreet, Jatinder Kumar, Satinderjit Singh, et al. "Investigation on the influence of point loads on the deflection behaviour of G+5 frame structure." IOP Conference Series: Earth and Environmental Science 889, no. 1 (2021): 012017. http://dx.doi.org/10.1088/1755-1315/889/1/012017.

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Abstract Nowadays, multi-storey structure portal frames are most commonly used worldwide. Multistory frames are used in structural systems in all metropolitan cities, future cities, and important businesses. The present study the effect of various point loads varying from 22 to 32 kN in steps of 2 were applied on the center of horizontal beams of the frame structure. The deflection behaviour in form of deflection, reaction, beading moments under point loading were discussed analytically according to stiffness matrix method and the results are validated with the help of simulation using STAAD P

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12

Lin, Xian Gen, and Yong Xu. "The Comparison of Portal Frame Design by Penalty Function Optimization and Traditional Method." Advanced Materials Research 452-453 (January 2012): 348–53. http://dx.doi.org/10.4028/www.scientific.net/amr.452-453.348.

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The comparison of portal frame design by penalty function optimization and traditional method aim at 30m span portal frame with tapered members was made. It was found that the essence of optimization design was to research the reasonable distributing of sections, through the interaction between capacity and key section parameters the optimization design were realized. Now the idea of green and less energy is fashionable, then optimization design is very significant in practical engineering. According to engineering statistics the optimization design can reduce 15%~30% of material quantity. In

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13

Abimbola, Yusuf Zainab, Jibrin Mohammed Kaura, and Uwemedimo Nyong Wilson. "Reliability-Based Analysis of Steel Portal Frame Eurocode Design Criteria Subjected to Flexural and Lateral Torsional Instability." Saudi Journal of Civil Engineering 9, no. 02 (2025): 37–48. https://doi.org/10.36348/sjce.2025.v09i02.002.

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Steel portal frames, used in factories, workshops, shopping complexes, and warehouses, provide large clear spans. Eurocode 3, a semi-probabilistic design code based on limit state design and adopted in Nigeria, does not fully address uncertainties in load and resistance variables, affecting frame performance in service. This study evaluates the reliability of three-hinged steel portal frames by analyzing three primary failure modes: flexural instability of frame stanchions (failure mode 1), flexural instability of frame rafters (failure mode 2), and lateral torsional instability of stanchions

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14

Apriani, Widya, Anggi Barus, and Fadrizal Lubis. "Uji Eksperimental Respon Struktur 3D Modelling Struktur Portal Open Frame dan Struktur Portal Bresing terhadap Beban Gempa." Journal of Infrastructure and Civil Engineering 1, no. 1 (2021): 1–12. http://dx.doi.org/10.35583/jice.v1i1.1.

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One of the obstacles in laboratory testing is the availability of testing capacity. So that the similitude method was developed which aims to replicate the state of the prototype by scaling the variables so that they can be tested in the laboratory. The purpose of this study was to determine the difference between the results of numerical tests and experimental tests on the response of the open frame portal structure and the braced portal structure to the perpindahan parameters and the driftt ratio of the steel portal structure in earthquake buildings. The method used in this research is the e

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15

H., Nabil H., and Iqbal A. R. "EVALUATION OF SPECIFIC METHODS TO DETECT CRACK AND DAMAGE OF MECHANICAL BEAM STRUCTURES USING FREE VIBRATION ANALYSIS." Journal of Engineering 15, no. 04 (2024): 4258–79. http://dx.doi.org/10.31026/j.eng.2009.04.11.

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The importance of the beam in the service of our life and how the damaged beam costly influence the economy and even endanger the human life itself, draws our attention to study the specific methods to detect crack and damage by using free vibration analysis of mechanical beam structures. In the present research, three kinds of beam structures have been investigated namely (simply supported beam, portal frame and crane frame) by using finite element method. Six cases of damage are modeled for simply supported beam and portal frame and with seven cases for crane frame. The damage is simulated b

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16

Tang, He Sheng, Jiao Wang, Yu Su, and Song Tao Xue. "Evidence Theory for Uncertainty Quantification of Portal Frames with Semi-Rigid Connections." Advanced Materials Research 663 (February 2013): 130–36. http://dx.doi.org/10.4028/www.scientific.net/amr.663.130.

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The buckling load or the equivalent buckling length factor of the portal frame structures is greatly influenced by stiffness of bracing elements and semi-rigid connections. In engineering the problem parameters (geometrical, material, strength, and manufacturing) are given or considered with uncertainties. The initial rotation stiffness uncertainties are taken into consideration. A differential evolution-based computational strategy for the representation of epistemic uncertainty in a system with evidence theory is developed. An uncertainty quantification analysis for the buckling load of port

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17

Jia, Wen Wen, and Deng Feng Wang. "Study of Bracing Force Acting at Mid-Span of Beam of Single-Span Portal Frame." Applied Mechanics and Materials 405-408 (September 2013): 869–72. http://dx.doi.org/10.4028/www.scientific.net/amm.405-408.869.

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The brace at the mid-span of beam of portal frame provides lateral constraint and improves its overall stability. By the nonlinear finite element method, the influences of structural parameters on the required bracing force for the beam bearing ultimate load were investigated when only one brace acting on the upper flange of beam at mid-span. The bracing force is correlated to the failure mode and configuration of beam of portal frame. The failure of beam trends to be controlled by the strength and the required bracing force increases when the stiffness of column increases. The required bracin

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18

Ozola, Lilita, and Janis Fabriciuss. "Numerical and Experimental Analysis of Timber Portal Frame with Semi-Rigid Knee Joints." IOP Conference Series: Materials Science and Engineering 1203, no. 3 (2021): 032008. http://dx.doi.org/10.1088/1757-899x/1203/3/032008.

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Abstract The problems related to development of rotational deformations of a knee joints and crack propagation in rafter elements of timber portal frames were discussed in this article. The rotational displacement, which develops between the rafter and column members due to the bending deformations of the bolts in the knee joint with a simultaneous embedment into the wood, increases the global deformations of the portal frame. Additionally, to axial force and bending moment the rafter elements are heavily loaded with shear force at the sections near knee joint especially. All effects together

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19

Bao Nghi, Le Luong, and Bui Cong Thanh. "A 6DOF super element for nonlinear analysis of composite frames with partial interaction and semi-rigid connections." Vietnam Journal of Mechanics 33, no. 1 (2011): 13–26. http://dx.doi.org/10.15625/0866-7136/33/1/35.

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This paper presents a displacement-based finite element formulation for nonlinear analysis of steel - concrete composite planar frames subjected to combined action of gravity and lateral loads. A 6DOF super element is proposed for modeling composite beam, allowing for partial interaction between the steel beam and the concrete slab, semi-rigid nature of beam to column composite connection and material nonlinearity. The load control method and the displacement control method are utilized for tracing the structural equilibrium paths, and the direct method is utilized for solving the nonlinear pr

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20

Obe, Tayo, Chinwuba Arum, and Oladimeji Olalusi. "Optimization of single-span single-storey portal frame buildings." Facta universitatis - series: Architecture and Civil Engineering 17, no. 4 (2019): 359–76. http://dx.doi.org/10.2298/fuace190610021o.

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Many structural designs are done without comprehensive consideration for achieving optimum design. To achieve minimum mass optimization, a mathematical model was developed in this study and subjected to British Standard (BS 5950) code requirements for structural integrity as constraints. Visual basic application (VBA) codes were written into a spreadsheet environment to implement the model. The developed optimization model was validated using different sample shed structures of same volume (729m?) but of different height to span to length (H: b: L) ratios which were obtained using the Ratio me

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21

Zhong, Xiao Qin, Fei Xing Wei, Ting Hu, and Ying Liu. "Study on Rigidity of Aluminum Alloy Portal-Type Frame Based on Finite Element Method." Advanced Materials Research 1028 (September 2014): 134–38. http://dx.doi.org/10.4028/www.scientific.net/amr.1028.134.

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An aluminum alloy portal-type main frame with double beams is designed in accordance with real production requirements of manufacturer. The working performances of the frame in different structures and under diverse loading conditions, along with the static strength simulation of rigidity on the basis of finite element method are studied, of which the key findings will provide the manufacturers with theoretical foundation for safety production and expand the allocation of aluminum alloy sections.

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22

Xia, Jun Wu, Ling Quan Bu, Zhi Chao Hou, and Xiao Wei Liu. "Research on Additional Internal Force and Deformation of the Portal Frame Construction Caused by Surface Deformation." Advanced Materials Research 163-167 (December 2010): 421–25. http://dx.doi.org/10.4028/www.scientific.net/amr.163-167.421.

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This article focuses on the construction of portal frame without crane. The dynamic variational laws of the additional internal force and displacement of the portal frame construction under the elongation, compression, tilt (uneven settlement), positive curvature and negative curvature deformation of ground are calculated by numerical simulation method, using the structural finite element analysis software – ANSYS. We find that the swing column will alter the distribution of the frame construction additional internal force with the surface deformation; and it can effectively restrict additiona

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23

Jebur, Hawraa Qasim, and Salah Rohaima Al-Zaidee. "Non-deterministic Approach for Reliability Evaluation of Steel Portal Frame." Civil Engineering Journal 5, no. 8 (2019): 1684–97. http://dx.doi.org/10.28991/cej-2019-03091363.

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In recent years, more researches on structural reliability theory and methods have been carried out. In this study, a portal steel frame is considered. The reliability analysis for the frame is represented by the probability of failure, P_f, and the reliability index, β, that can be predicted based on the failure of the girders and columns. The probability of failure can be estimated dependent on the probability density function of two random variables, namely Capacity R, and Demand Q. The Monte Carlo simulation approach has been employed to consider the uncertainty the parameters of R, and Q.

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24

Ummah, Kuntum Chairum, and Achmad Syarifudin. "Corruption case of Base Transceiver Station (BTS) in Indonesia: Framing analysis study of MediaIndonesia.com and Okezone.com." Digital Theory, Culture & Society 1, no. 1 (2023): 53–59. http://dx.doi.org/10.61126/dtcs.v1i1.9.

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The BTS (Base Transceiver Station) construction corruption case of the Minister of Communications and Information, Johny G. Plate, who is also a cadre of the Nasdem Party, has caused a lot of debate among netizens. Online news portals with different party owners are also said to have an impact on the framing of reality and influencing readers' perspectives in viewing the BTS corruption issue. Therefore, it is necessary to further examine how the online media Mediaindonesia.com and Okezone.com framed the corruption case involving Johny G. Plate as the Secretary General of Nasdem Party and forme

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25

Mottershead, J. E., T. K. Tee, C. D. Foster, and R. Stanway. "An Experiment to Identify the Structural Dynamics of a Portal Frame." Journal of Vibration and Acoustics 112, no. 1 (1990): 78–83. http://dx.doi.org/10.1115/1.2930102.

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This paper describes the application of sequential frequency domain techniques to the estimation of mass, stiffness, and damping parameters using measured frequency response functions from a portal frame rig. The theory of the method has been described in the authors’ previous publications. A portal frame is representative of many engineering structures. It is lightly damped and may be thought of as an element of several larger structures such as bridges, transmission towers, and the steel foundations of modern power generating plant. The results offered in this paper are thus of interest to a

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Pogonowska-Płatek, Sylwia, and Wojciech Dornowski. "Stability analysis of steel frames according to Eurocode 3." Bulletin of the Military University of Technology 68, no. 2 (2019): 145–63. http://dx.doi.org/10.5604/01.3001.0013.3008.

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In the paper, the qualitative and quantitative comparison of EC3 methods to verify the global stability of the structure is presented. The steel portal frame subjected to varied loads is considered. The initial global sway imperfection and the initial local bow imperfections of member frame are taken into account. The sensitivity of a structure to the 2nd order effects is assessed indirectly using the elastic critical load. The elastic critical load of a frame is calculated according to the buckling mode. The 2nd order effects are taken into account using the finite element method. Keywords: s

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Sanjaya, Fajar Putra, Bayzoni Bayzoni, and Eddy Purwanto. "Design of Flat Plate with Equivalent Frame Design Method and Finite Element Method." Jurnal Rekayasa Sipil dan Desain 6, no. 4 (2018): 559–68. https://doi.org/10.23960/jrsdd.v6i4.1115.

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The flate plate is a thick, evenly solid concrete plate that transfers the load directly to the support column without the aid of a beam or shear head or drop panel. This type of plate can be made quickly because of the formwork and simple reinforcement arrangement. The flate plate is planned to be uniform with dimensions of 5000x4000 mm as many as 9 panels, plate thickness of 150 mm with 25 MPa concrete quality, quality of reinforcement 280 MPa and based on the provisions of SNI 1727; 2013 and SNI 2847; 2013. Flat plate analysis uses the equivalent frame design method, finite element method a

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Ding, Jianguo, Wei Zhuang, and Pingxin Wang. "Study on the Seismic Response of a Portal Frame Structure Based on the Transfer Matrix Method of Multibody System." Advances in Mechanical Engineering 6 (January 1, 2014): 614208. http://dx.doi.org/10.1155/2014/614208.

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Portal frame structures are widely used in industrial building design but unfortunately are often damaged during an earthquake. As a result, a study on the seismic response of this type of structure is important to both human safety and future building designs. Traditionally, finite element methods such as the ANSYS and MIDAS have been used as the primary methods of computing the response of such a structure during an earthquake; however, these methods yield low calculation efficiencies. In this paper, the mechanical model of a single-story portal frame structure with two spans is constructed

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Yan, Wei, Wan Chun Li, and Wei Wang. "Finite Element EMI Model for Cracked Portal Frame and Parameter Study." Applied Mechanics and Materials 226-228 (November 2012): 1181–84. http://dx.doi.org/10.4028/www.scientific.net/amm.226-228.1181.

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Based on the three-dimensional finite element method (3D FEM), an electro-mechanical impedance (EMI) model is established for a cracked portal frame. In this analysis, the effect of the interfacial properties between the piezoelectric patches and the host structure on the EMI signatures is considered and thus a coupled structural system consisting of PZT patches, bonding layer and host structure is then investigated. Comparison with numerical results by other methods is made to validate the effectivity and accuracy of the proposed EMI model. The effects of various parameters including the mate

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Li, Dong Nan, Jing Yu Wu, and Cun En Chen. "Research of Optimization Design of Structural Concept about Portal Frame." Applied Mechanics and Materials 130-134 (October 2011): 719–24. http://dx.doi.org/10.4028/www.scientific.net/amm.130-134.719.

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There're two issues should be concerned about during the optimization design of structural concept. The one is The using performance of structure, the another is the cost of foundation should be contained in the cost of whole structure. And it is suggested that The cost performance in value engineering should be used during the optimization design of structural concept. In this paper, the method and the process of the optimum structural design is expounded by optimizing a structural concept of project.

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Lin, Xian Gen, and Yong Xu. "The Comparison of Portal Frame Design by Penalty Function Optimization and Traditional Method." Advanced Materials Research 452-453 (January 2012): 348–53. http://dx.doi.org/10.4028/scientific5/amr.452-453.348.

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Yurchenko, Vitalina, Ivan Peleshko, and Nikita Biliaiev. "APPLICATION OF GRADIENT PROJECTION METHOD TO PARAMETRIC OPTIMIZATION OF STEEL LATTICE PORTAL FRAME." International Journal for Computational Civil and Structural Engineering 17, no. 3 (2021): 132–56. http://dx.doi.org/10.22337/2587-9618-2021-17-3-132-156.

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The paper has proposed a mathematical model for parametric optimization problem of the steel lattice portal frame. The design variable vector includes geometrical parameters of the structure (node coordinates), as well as cross-sectional dimensions of the structural members. The system of constraints covers load-carrying capacities constraints formulated for all design sections of structural members of the steel structure subjected to all ultimate load case combinations. The displacements constraints formulated for the specifiednodes of the steel structure subjected to all serviceability load

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33

Felix, Jorge L. Palacios, José M. Balthazar, and Reyolando M. L. R. F. Brasil. "On Saturation Control of a Non-Ideal Vibrating Portal Frame Foundation Type Shear-Building." Journal of Vibration and Control 11, no. 1 (2005): 121–36. http://dx.doi.org/10.1177/1077546305047656.

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In this paper, we examine the nonlinear control method based on the saturation phenomenon and of systems coupled with quadratic nonlinear ties applied to a shear-building portal plane frame foundation that supports an unbalanced direct current with limited power supply (non-ideal system). We analyze the equations of motion by using the method of averaging and numerical simulation. The interaction of the non-ideal structure with the saturation controller may lead to the occurrence of interesting phenomena during the forward passage through the several resonance states of the systems. Special at

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Toloue, Iraj, Mohd Shahir Liew, I. S. H. Harahap, and H. E. Lee. "A novel approach to enhance the accuracy of vibration control of Frames." E3S Web of Conferences 34 (2018): 01027. http://dx.doi.org/10.1051/e3sconf/20183401027.

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All structures built within known seismically active regions are typically designed to endure earthquake forces. Despite advances in earthquake resistant structures, it can be inferred from hindsight that no structure is entirely immune to damage from earthquakes. Active vibration control systems, unlike the traditional methods which enlarge beams and columns, are highly effective countermeasures to reduce the effects of earthquake loading on a structure. It requires fast computation of nonlinear structural analysis in near time and has historically demanded advanced programming hosted on powe

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35

van de Lindt, John W., and R. Karthik Rechan. "Seismic Performance Comparison of a High-Content SDA Frame and Standard RC Frame." Advances in Civil Engineering 2011 (2011): 1–12. http://dx.doi.org/10.1155/2011/478475.

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This study presents the method and results of an experiment to study the seismic behavior of a concrete portal frame with fifty percent of its cement content replaced with a spray dryer ash (SDA). Based on multiple-shake-table tests, the high content SDA frame was found to perform as well as the standard concrete frame for two earthquakes exceeding design-level intensity earthquakes. Hence, from a purely seismic/structural standpoint, it may be possible to replace approximately fifty percent of cement in a concrete mix with SDA for the construction of structural members in high seismic zones.

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Silva, N. R. S., L. L. Corso, A. Tamagna, and H. M. Gomes. "Genetic Algorithms and Modal Sensitivity for Damage Detection on Portal Frames." Mecánica Computacional XXV, no. 21 (2006): 1879–92. https://doi.org/10.5281/zenodo.7054640.

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The use of natural frequency as a diagnostic parameter in structural damage detection and vibration monitoring, has been discussed in the last decade for many authors in several works. The large use of natural frequencies and mode shapes as sensitive indicators of structural integrity is due to the fact of the ease in measuring these modal parameters experimentally. Many types of methods are employed in the state of art in damage detection and location using low frequency data. There are two classes of methods that are investigated here: the first is based on frequency sensitivity to the damag

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Prashant, Gusain, Mahara Solindar, Thakur Riya, Vikramaditya Singh Rajkumar, Ramching Sharad, and Teri Tassar. "Structural Analysis and Design of a G+3 Residential Building: A Comparative Study in Dehradun." Research and Review: Journal of Structural and Building Construction 1, no. 2 (2025): 14–18. https://doi.org/10.5281/zenodo.15385906.

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<em>This paper presents a theoretical exploration of the structural analysis and design process for a G+3 (Ground plus three floors) residential building. The core objective is to compare traditional manual calculation techniques with the capabilities of structural analysis software (specifically STAAD Pro). The analysis considers fundamental load types: gravity loads (dead and live loads, following Indian Standard IS 875) and lateral loads, particularly seismic forces evaluated using the Equivalent Static Method outlined in IS 1893 (Part 1): 2016. Key structural elements like slabs, beams, an

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Karaton, Muhammet. "Nonlinear Earthquake Analysis of Reinforced Concrete Frames with Fiber and Bernoulli-Euler Beam-Column Element." Scientific World Journal 2014 (2014): 1–15. http://dx.doi.org/10.1155/2014/905963.

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A beam-column element based on the Euler-Bernoulli beam theory is researched for nonlinear dynamic analysis of reinforced concrete (RC) structural element. Stiffness matrix of this element is obtained by using rigidity method. A solution technique that included nonlinear dynamic substructure procedure is developed for dynamic analyses of RC frames. A predicted-corrected form of the Bossak-αmethod is applied for dynamic integration scheme. A comparison of experimental data of a RC column element with numerical results, obtained from proposed solution technique, is studied for verification the n

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Paullo Muñoz, Luis Fernando, Paulo B. Gonçalves, Ricardo A. M. Silveira, and Andréa Silva. "Nonlinear Resonance Analysis of Slender Portal Frames under Base Excitation." Shock and Vibration 2017 (2017): 1–21. http://dx.doi.org/10.1155/2017/5281237.

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The dynamic nonlinear response and stability of slender structures in the main resonance regions are a topic of importance in structural analysis. In complex problems, the determination of the response in the frequency domain indirectly obtained through analyses in time domain can lead to huge computational effort in large systems. In nonlinear cases, the response in the frequency domain becomes even more cumbersome because of the possibility of multiple solutions for certain forcing frequencies. Those solutions can be stable and unstable, in particular saddle-node bifurcation at the turning p

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Yurchenko, V. V., I. D. Peleshko, and Nikita Biliaiev. "Application of improved gradient projection method to parametric optimization of steel lattice portal frame." IOP Conference Series: Materials Science and Engineering 1164, no. 1 (2021): 012090. http://dx.doi.org/10.1088/1757-899x/1164/1/012090.

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Palacios, J. L., J. M. Balthazar, and R. M. L. R. F. Brasil. "On non-ideal and non-linear portal frame dynamics analysis using bogoliubov averaging method." Journal of the Brazilian Society of Mechanical Sciences 24, no. 4 (2002): 257–65. http://dx.doi.org/10.1590/s0100-73862002000400002.

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RAHMAN, MAHBUBUR, YIXIANG XU, JAMES B. P. LIM, et al. "BEHAVIOR OF STEEL PORTAL FRAMES IN FIRE: COMPARISON OF IMPLICIT AND EXPLICIT DYNAMIC FINITE ELEMENT METHODS." International Journal of Structural Stability and Dynamics 13, no. 04 (2013): 1250058. http://dx.doi.org/10.1142/s0219455412500587.

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The use of finite element methods to determine the collapse behavior of steel portal frames in fire requires temperature, large deformation, complex geometry, boundary conditions and degradation of material stiffness to be taken into account. For such analyses, the cost of computation is important as well as the accuracy, robustness and stability of the analyses. The implicit dynamic method is a rigorous technique that considers the equilibrium of every time step. However, convergence may become an issue, particularly if the frame undergoes structural instability while using a direct time incr

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Hari Akbar, Yokta, and Vike Itteridi. "ANALISIS PERENCANAAN STRUKTUR GEDUNG 8 LANTAI DENGAN VARIASI BRACING MENGGUNAKAN APLIKASI PROGRAM ETABS." JURNAL ILMIAH BERING'S 7, no. 01 (2020): 14–18. http://dx.doi.org/10.36050/berings.v7i1.251.

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In planning the construction of buildings located in earthquake-prone areas, especially in the city of natural fences, which are included in earthquake zone 5, namely areas with high levels of earthquake, so that the structural analysis can be planned with the special moment-bearing frame system method (SRPMK) and provides bracing on the portal so that the building structure becomes more rigid. Concentric bracing has a variety of forms including types Z, X, V and Ʌ. This study aimed to plan the safe upper structural eliments from the burdens that occur by adding bracing variations and in accor

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ZHU, SONGYE, WEN-YU HE, and WEI-XIN REN. "ADAPTIVE-SCALE DAMAGE DETECTION FOR FRAME STRUCTURES USING BEAM-TYPE WAVELET FINITE ELEMENT: EXPERIMENTAL VALIDATION." Journal of Earthquake and Tsunami 07, no. 03 (2013): 1350024. http://dx.doi.org/10.1142/s1793431113500243.

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The superior human vision system provides ingenious insight into an ideal damage detection strategy in which structural modeling scales are not only spatially varying but also dynamically changed according to actual needs. This paper experimentally examines the efficacy of a multi-scale damage detection method based on wavelet finite element model (WFEM). The beam-type wavelet finite element in this study utilizes the second-generation cubic Hermite multi-wavelets as interpolation functions. The dynamic testing results of a one-bay steel portal frame with multiple damages are employed in the e

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Fernández-García, María S., Desirée Rodríguez-Robles, José Ramón Villar-García, and Pablo Vidal-López. "Genetic Algorithm for Cost Optimization of Different Multi-Tunnel Greenhouse Design Alternatives." Agronomy 12, no. 9 (2022): 2145. http://dx.doi.org/10.3390/agronomy12092145.

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Greenhouses are employed worldwide to protect crops from meteorological conditions as well as to control some plant production variables. As multi-tunnel structures are amongst the most used, in this article, we focus on cost optimization of both the steel structure and the concrete foundation of this greenhouse typology. Firstly, three structural alternatives composed of three tunnels and differentiated portal frames were dimensioned conforming to the European design of steel structures, namely, Eurocode 3; meanwhile, the foundation was calculated through a previously validated matrix method.

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Liu, Hong Wei, and Jun Li. "Initial Stiffness Analysis of Steel Portal Frame End-Plate Connections Based on Finite Element Method." Advanced Materials Research 446-449 (January 2012): 867–70. http://dx.doi.org/10.4028/www.scientific.net/amr.446-449.867.

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Steel portal frame is easy to build,but the connection styles of end-plate have greater influence on the structure. In this paper, The formula about initial stiffness of end-plate connections has been given.The essay uses ANSYS to analyze the initial stiffness of end-plate connections. Several factors have also been analyzed about the stiffness.The conclusion is that the form of end-plate, thickness, bolt diameter all affect the structural deflections.But these reasons couldn’t change the integral moment of the structure.

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Huang, Zhen, Yong Jun Wu, and Chang Zhang. "Bamboo Strengthened with Carbon Fiber Reinforced Polymer for the Substitutes of Steel Substructures." Key Engineering Materials 517 (June 2012): 233–37. http://dx.doi.org/10.4028/www.scientific.net/kem.517.233.

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This paper presents an investigation on the mechanical properties of bamboos Mao Zhu (Phyllostachys Pubescens) strengthened with carbon fiber reinforced polymer (CFRP) and used as the substitute of steel substructures for a low carbon construction. At first, a series experimental study is carried out to investigate the compressive strength, bending strength and tensile strength of Mao Zhu, which is strengthened with CFRP by different ways. Then the mechanical properties of bamboos with different strengthening methods of CFRP are compared. The most efficient strengthening method is suggested fo

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Maida, Yusuke, and Hiroyasu Sakata. "Cyclic loading test of reinforced concrete frames protected with brace-type friction dampers." Advances in Structural Engineering 25, no. 1 (2021): 83–97. http://dx.doi.org/10.1177/13694332211042785.

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In this study, cyclic loading tests were conducted on reinforced concrete (RC) portal frames with brace-type friction dampers. The boundary conditions that could reproduce the axial forces exerted on the beams were adopted. To resist the axial force acting on the RC member, a damper connection method was employed by using steel inserted through the center of the RC member. The purpose of this study was to a) understand the behavior of the damper connection and the RC frame with brace-type friction dampers based on experimental tests and b) to confirm the effectiveness of the new connection met

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Nishiyama, M., H. Mugurama, and F. Watanabe. "Hysteretic restoring force characteristics of unbounded prestressed concrete framed structure under earthquake load." Bulletin of the New Zealand Society for Earthquake Engineering 22, no. 2 (1989): 112–21. http://dx.doi.org/10.5459/bnzsee.22.2.112-121.

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An analytical method, by which hysteretic restoring force characteristics of unbonded prestressed concrete framed structure can be statically pursued on the basis of material properties, is presented. The bond-slip relationship between concrete and prestressing tendon is taken into account, and thus the method covers unbonded members and bonded members. For verifying the propriety of the analytical method, the experiment is carried out on a portal frame with an unbonded prestressed concrete beam of 4.2 m in length and reinforced concrete columns of 1 m in height. High intensity reversed cyclic

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AU, F. T. K., and Z. H. YAN. "DYNAMIC ANALYSIS OF FRAMES WITH MATERIAL AND GEOMETRIC NONLINEARITIES BASED ON THE SEMIRIGID TECHNIQUE." International Journal of Structural Stability and Dynamics 08, no. 03 (2008): 415–38. http://dx.doi.org/10.1142/s0219455408002727.

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This paper presents a method for nonlinear dynamic analysis of frames with material and geometric nonlinearities which is based on the semirigid technique. The plastic hinge that accounts for the material nonlinearity is modeled as a pseudo-semirigid connection with nonlinear hysteretic moment-curvature characteristics at the element ends. The stiffness matrix of a frame element with material and geometric nonlinearities is expressed as the sum of products of the standard stiffness matrix and the geometric stiffness matrix of the element, with their corresponding correction matrices based on t

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