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Dissertations / Theses on the topic 'Special moment resisting frames'

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Published: 4 June 2021
Last updated: 7 February 2022

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1

Liuzza, Gabrielle. "The elongation of beams in reinforced concrete special moment resisting frames." Thesis, Kansas State University, 2018. http://hdl.handle.net/2097/38780.

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Master of Science<br>Department of Architectural Engineering and Construction Science<br>Donald J. Phillippi<br>Special moment resisting frames (SMRF) are intended to protect the structure from earthquake motions through a ductile inelastic response. This thesis evaluates the performance of reinforced concrete SMRFs with an emphasis on the second level beams. Due to previous research, it is concluded that two-dimensional finite element analyses (2D-FEA) and three-dimensional finite element analyses (3D-FEA) have different results when evaluating the same structure. Due to this, the thesis u
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2

Johnson, Curtis Mathias. "A comparison of Reduced Beam Section moment connection and Kaiser Bolted Bracket® moment connections in steel Special Moment Frames." Thesis, Kansas State University, 2017. http://hdl.handle.net/2097/36233.

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Master of Science<br>Department of Architectural Engineering and Construction Science<br>Kimberly W. Kramer<br>Of seismic steel lateral force resisting systems in practice today, the Moment Frame has most diverse connection types. Special Moment frames resist lateral loads through energy dissipation of the inelastic deformation of the beam members. The 1994 Northridge earthquake proved that the standard for welded beam-column connections were not sufficient to prevent damage to the connection or failure of the connection. Through numerous studies, new methods and standards for Special Moment F
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3

Wearing, Christopher. "Evaluation of force distribution within a dual special moment-resisting and special concentric-brace frame system." Thesis, Kansas State University, 2017. http://hdl.handle.net/2097/35483.

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Master of Science<br>Department of Architectural Engineering and Construction Science<br>Kimberly W. Kramer<br>Dual Lateral Force Resisting Systems are currently required by code to include a Moment Resisting Frame capable of resisting at least 25% of the lateral loads. This thesis evaluates the seismic performance of a specific type of dual system: a Special Moment Resisting Frame-Special Concentric Brace Frame System (SMRF-SCBF) under three different force distributions. The three distributions were 80% - 20%, 75% - 25%, and 70% - 30% with the lesser force being allotted to the Special Mom
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4

Szabo, Trevor Alexander. "Development and Validation of a Twelve Bolt Extended Stiffened End-Plate Moment Connection." Thesis, Virginia Tech, 2017. http://hdl.handle.net/10919/78230.

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Three end-plate moment connection configurations are prequalified for special moment frames for seismic applications in AISC 358-10. The eight bolt extended stiffened connection is the strongest of the three configurations, but it can only develop approximately 30 percent of currently available hot-rolled beam sections. The strength of this configuration is limited by bolt strength. There is a need for a stronger end-plate moment connection, hence the reason for the development and validation of a twelve bolt configuration. Equations were developed for the design procedure using various analyt
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5

Kayayan, Hratch. "Dynamic response of moment-resisting steel frames." Thesis, McGill University, 1994. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=22656.

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The focus of this study is to determine if the current design provisions related to moment-resisting steel frames result in frames that behave in the manner anticipated by code writers and, more importantly, that respond satisfactorily during a real seismic event.<br>Twelve steel moment-resisting frames were designed according to the Canadian steel standard for buildings CSA-S16.1-M89 and the National Building Code of Canada NBCC-1990. The frames were three, eight, and twenty story tall. They were ductile moment-resisting frames designed for seismic velocity zones v = 0.1, 0.2 and 0.3, and nom
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6

Oddbjornsson, Olafur. "Dynamics of Nonlinear Elastic Moment Resisting Frames." Thesis, University of Bristol, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.520258.

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7

Castro, Jose Miguel De Freitas. "Seismic behaviour of composite moment-resisting frames." Thesis, Imperial College London, 2006. http://hdl.handle.net/10044/1/7617.

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8

Helmi, Karim. "Seismic damage assessment of moment resisting steel frames." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape3/PQDD_0011/MQ52568.pdf.

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9

Kazantzi, Athanasia K. "Probabilistic seismic performance assessment of steel moment resisting frames." Thesis, University of Surrey, 2008. http://epubs.surrey.ac.uk/2782/.

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During the last decade, the use of probabilistic tools for assessing the reliability of structural systems under seismic excitations has attracted considerable research. This has been prompted by the damages detected in many buildings following severe earthquake events, and the fact that the uncertainties related to the structural capacity, demand and seismic loading, may be more efficiendy accounted for and quantified within a probabilistic context. With seismic probabilistic methodologies still under development, this thesis aims to explore reliability issues associated with steel Moment Res
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10

Li, Alex C. (Alex Chung-Hsing) 1974. "Effect of seismic loading on steel moment resisting frames." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/50061.

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Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1998.<br>Includes bibliographical references (leaves 47-48).<br>In recent history, the use of Steel Moment Resisting Frames (SMRF) in many structural steel buildings has become popular among many engineers and designers. The use of these moment resisting frames allows for more open spaces between floors and columns than in buildings that use the more traditional braced frame construction. One of the critical aspects of the moment resisting frames is the connections between the beams and the co
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11

Kumar, Mukesh. "Inelastic seismic response assessment of moment resisting steel frames." Thesis, Imperial College London, 2012. http://hdl.handle.net/10044/1/14524.

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To improve the predictability of structural and non-structural damage of structures for a given hazard scenario, it is essential to identify factors that influence the response and evaluate their contribution. Several studies have therefore focused on the assessment of parameters that influence the inelastic response of structures under seismic loading. However, these studies have in most cases been limited to single degree of freedom (SDF) systems and generic frames with controlled strength and stiffness distribution characteristics. In addition to this, the influence of the frequency content
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12

Tuna, Mehmet. "Inelastic Panel Zone Deformation Demands In Steel Moment Resisting Frames." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614329/index.pdf.

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Panel zone is one of the significant parts of beam-column connections in steel structures. Until the 1994 Northridge Earthquake, a few experimental research and parametric studies had been carried out to understand the behavior of the panel zones. However, after the Northridge Earthquake, it was observed that beam-column connections were unable to show presumed seismic performance. Therefore, current design codes needed to be revised to improve seismic performance of connections in general and panel zones in particular. In this research, panel zone deformation demands are examined using explic
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13

Chou, Chung-Che. "An energy-based seismic evaluation procedure for moment-resisting frames /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC IP addresses, 2001. http://wwwlib.umi.com/cr/ucsd/fullcit?p9995988.

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14

Gomelskaya, Renata. "Dynamic amplification factor for moment resisting frames in progressive collapse." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/90018.

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Thesis: M. Eng., Massachusetts Institute of Technology, Department of Civil and Environmental Engineering, 2014.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 85-86).<br>Progressive collapse has been a prevalent research topic since a gas explosion caused the collapse of the Ronan Point apartment building in 1968. Progressive collapse occurs when an instantaneous loss of a supporting element causes failure in adjacent members leading to a large scale collapse of the structure. The General Services Administration (GSA) and the Department of Defense (DoD)
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15

Dickof, Carla. "Clt infill panels in steel moment resisting frames as a hybrid seismic force resisting system." Thesis, University of British Columbia, 2013. http://hdl.handle.net/2429/44209.

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This paper examines CLT-steel hybrid systems at three, six, and nine storey heights to increase seismic force resistance compared to a plain wood system. CLT panels are used as infill in a steel moment frame combining the ductility of a steel moment frame system with a stiffness and light weight of CLT panels. This system allows for the combination of high strength and ductility of steel with high stiffness and light weight of timber. This thesis examines the seismic response of this type of hybrid seismic force resisting system (SFRS) in regions with moderate to high seismic hazard indices.
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16

Kariniotakis, Konstantinos. "Seismic design procedure for steel moment resisting frames with viscous dampers." Thesis, University of Warwick, 2017. http://wrap.warwick.ac.uk/97984/.

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Modern technologies for seismic hazard mitigation in building structures, such as passive dampers, make it possible to design economically viable buildings that (a) experience significantly less damage than conventional buildings designed according to seismic codes; and (b) return to service within an acceptable short, if not immediate, time after a strong earthquake. The latter is of significant importance as recent strong earthquakes resulted in high socio-economic losses due to long disruption of the use or occupation of a large number of buildings. Among the different types of passive damp
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17

Flores, Ruiz Jose Antonio. "Performance of ductile reinforced concrete moment resisting frames subject to earthquake actions." Thesis, University of Canterbury. Department of Civil and Natural Resources Engineering, 2005. http://hdl.handle.net/10092/4932.

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It has been shown that the strengths specified in the Loadings Standard NZS 4203: 1992 (Standards New Zealand 1992) to resist seismic actions are low when compared with major international design codes (Fenwick and Davidson 1994; Fenwick et al. 2002). Few modifications to these low strengths other than an increase in the minimum permissible base shear have been made in the draft revision of the Standard, NZS 1170.5. Furthermore, the design procedure to allow for higher mode effects in multi-storey structures subject to dynamic forces was developed in the 70's using a limited number of non-line
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18

Olmez, Harun Deniz. "A Numerical Study On Special Truss Moment Frames." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/12611322/index.pdf.

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A three-phase numerical study was undertaken to address some design issues related with special truss moment frames (STMFs). In the first phase, the design approaches for distribution of shear strength among stories were examined. Multistory STMFs sized based on elastic and inelastic behavior were evaluated from a performance point of view. A set of time history analysis was conducted to investigate performance parameters such as the interstory drift ratio and the plastic rotation at chord member ends. The results of the analysis reveal that the maximum interstory drifts are not significantly
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19

Petersen, Troy A. "The displacement ductility of steel moment resisting frames using welded flange plate connections /." Available to subscribers only, 2006. http://proquest.umi.com/pqdweb?did=1136091371&sid=2&Fmt=2&clientId=1509&RQT=309&VName=PQD.

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20

Muscio, Saverio <1976&gt. "Evaluation of the effects of insertion of viscous dampers in Moment Resisting Frames." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2010. http://amsdottorato.unibo.it/3134/.

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This research work faces the problem of insertion of viscous dampers into Moment Resisiting Frames (MRF) for maximum efficiency in mitigation of the seismic effects. The work would lead to a precise design indication. The fundamental result of the thesis consists in showing that, even for moment-resisting structures, you can design a system of added viscous dampers able to achieve target levels of performances. Ie given the reduction factor in the seismic response, discover the characteristics of the viscous dampers which allow to achieve it.
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21

Schrader, Craig A. "Prequalification and Design of Rolled Bolted T-stub Connections in Moment Resisting Frames." University of Cincinnati / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1291060563.

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22

Hantouche, Elie. "Behavior Of Thick Flange Built-up T-stub Connections For Moment Resisting Frames." University of Cincinnati / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1313687182.

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23

Al-Sadoon, Zaid. "Seismic Retrofitting of Conventional Reinforced Concrete Moment-Resisting Frames Using Buckling Restrained Braces." Thesis, Université d'Ottawa / University of Ottawa, 2016. http://hdl.handle.net/10393/34755.

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Reinforced concrete frame buildings designed and built prior to the enactment of modern seismic codes of the pre-1970’s era are considered seismically vulnerable, particularly when they are subjected to strong ground motions. It is the objective of this research to develop a new and innovative seismic retrofit technology for seismic upgrading of nonductile or limited ductility reinforced concrete frame buildings involving the implementation of buckling restrained braces. To achieve this objective, combined experimental and analytical research was conducted. The experimental research involved t
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24

Liebau, Corey. "Eccentrically Braced Frames in Combination with Moment Frames to Re-Center Buildings After a Seismic Event." University of Cincinnati / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1595499892303185.

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25

Vaicik, Stephen L. "The deflection amplification factor of steel moment resisting frames using reduced beam section connections /." Available to subscribers only, 2006. http://proquest.umi.com/pqdweb?did=1136091381&sid=5&Fmt=2&clientId=1509&RQT=309&VName=PQD.

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26

Downs, William M. "Modeling and Behavior of the Beam/Column Joint Region of Steel Moment Resisting Frames." Thesis, Virginia Tech, 2002. http://hdl.handle.net/10919/46198.

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The effect of panel zone (PZ) flexibility and yielding on the stiffness and strength of steel moment resisting frames (SMRF) has been the topic of numerous papers over the past thirty years. When properly detailed, the PZ is an excellent source of energy dissipation, even under large inelastic deformations. Due to these large inelastic deformations, the PZ region may also be a weak link in steel moment frame behavior. Because of the importance of PZ deformation in the behavior of steel frames, accurate modeling of this region is critical. Two of the most commonly used mathematical models f
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27

Yang, Jiaqi, and 楊家琦. "Influence of strengthening and repair schemes on dowel type timber joints and moment resisting frames." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2013. http://hdl.handle.net/10722/195963.

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Timber has been a widely used construction material throughout the history of human development and it is still popular to this day. Timber frames are a common structural form used in historical and modern day structures. An effective means to connect timber members together is via bolts or dowels due to their high strength, ductile behaviour and flexibility in application. Such joints are, however, vulnerable and prone to damage especially during seismic attacks. In order to improve the performance and longevity of timber framed structures, it is necessary to develop simple but effective stre
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28

Kozma, Thomas Mathias A. "Analytical Investigation of the Effect of Partially-Restrained Connections on Hybrid Moment-Resisting Steel Frames." University of Cincinnati / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1406819681.

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29

Atlayan, Ozgur. "Hybrid Steel Frames." Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/50562.

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The buildings that are designed according to the building codes generally perform well at severe performance objectives (like life safety) under high earthquake hazard levels. However, the building performance at low performance objectives (like immediate occupancy) under low earthquake hazards is uncertain. The motivation of this research is to modify the design and detailing rules to make the traditional systems perform better at multi-level hazards.<br /><br />This research introduces two new structural steel systems: hybrid Buckling Restrained Braced Frames (BRBF) and hybrid steel Moment F
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30

Buell, Grant. "Comparison of structural steel lateral force resisting systems for a theoretical hospital grid system." Manhattan, Kan. : Kansas State University, 2009. http://hdl.handle.net/2097/2321.

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31

Hobbs, Michael. "Effects of Slab-Column Interaction in Steel Moment Resisting Frames with Steel-Concrete Composite Floor Slabs." Thesis, University of Canterbury. Civil and Natural Resources Engineering, 2014. http://hdl.handle.net/10092/9946.

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Composite construction is widely used worldwide and is undergoing significant technological development. New Zealand is part of this development, with new beam options incorporating multiple unstiffened web openings and new deck profiles supported by extensive testing. However, one area where relatively little research has been undertaken is in the interaction of the composite slab with the seismic resisting system under lateral loading. In order to provide important new information in this area, a series of full scale beam-column-joint-slab subassemblies were tested at the University of Can
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32

Li, Xiaohua. "Evaluation of Earthquake-Induced Local Damage in Steel Moment-Resisting Frames Using Wireless Piezoelectric Strain Sensing." 京都大学 (Kyoto University), 2015. http://hdl.handle.net/2433/202704.

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33

Biddah, Aiman Mahmoud Samy. "Evaluation of the seismic level of protection of steel moment resisting frame building structures." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0007/NQ42833.pdf.

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34

Fuqua, Brandon W. "Buckling restrained braced frames as a seismic force resisting system." Manhattan, Kan. : Kansas State University, 2009. http://hdl.handle.net/2097/1131.

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35

Kayikci, Duygu y. "The Behavior of Moment Resisting Steel Frames Under Seismic Excitation with Variation of Geometric Dimensions of Architectural Setbacks." Scholarly Repository, 2011. http://scholarlyrepository.miami.edu/oa_dissertations/583.

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This study investigates seismic response of the Moment-Resisting-Steel Frames (MRSF) with the architectural setbacks. The main objective of the study is to understand the variation of the elastic and inelastic, static and dynamic behavior with changes in the geometric dimensions of the tower portion. A second objective of the study is to determine the adequacy of the analysis procedures of various rigors, specified in current seismic design provision, in predicting those behaviors for MRSF with various size of setback. The analytical study is conducted using a regular and 16 irregular model
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36

Penubothu, Naga Nataraja Satyanarayana Kumar. "Development of a phenomenological model for beam-to-column connections in moment resisting frames subjected to seismic loads." Cincinnati, Ohio : University of Cincinnati, 2006. http://www.ohiolink.edu/etd/view.cgi?acc%5Fnum=ucin1152583558.

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Thesis (M.S.)--University of Cincinnati, 2006.<br>Title from electronic thesis title page (viewed Nov. 28, 2006). Includes abstract. Keywords: Connections, Moment Resisting Frames, Phenomenological Model, Cyclic; Loads, Seismic loads. Includes bibliographical references.
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37

Hunt, Stephen J. "Semi-active smart-dampers and resetable actuators for multi-level seismic hazard mitigation of steel moment resisting frames." Thesis, University of Canterbury. Mechanical Engineering, 2002. http://hdl.handle.net/10092/1256.

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This thesis explores the creation and assessment of semi-active control algorithms for both squat shear buildings and tall flexible structures. If cost-effective, practicable, semi-active structural control systems can be developed, the potential reduction in loss of both property and lives due to seismic events is significant. Semi-active controllers offer many of the benefits of active systems, but have power requirements orders of magnitude smaller, and do not introduce energy to the structural system. Previous research into semi-active controllers has shown their potential in linear simula
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38

Hunt, Stephen John. "Semi-active smart-dampers and resetable actuators for multi-level seismic hazard mitigation of steel moment resisting frames." Thesis, University of Canterbury. Mechanical Engineering, 2002. http://hdl.handle.net/10092/6615.

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This thesis explores the creation and assessment of semi-active control algorithms for both squat shear buildings and tall flexible structures. If cost-effective, practicable, semi-active structural control systems can be developed, the potential reduction in loss of both property and lives due to seismic events is significant. Semi-active controllers offer many of the benefits of active systems, but have power requirements orders of magnitude smaller, and do not introduce energy to the structural system. Previous research into semi-active controllers has shown their potential in linear simula
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39

Oesterle, Michael Gerhardt. "Use of Incremental Dynamic Analysis to Assess the Performance of Steel Moment-Resisting Frames with Fluid Viscous Dampers." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/31536.

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This thesis presents the results of a study that uses Incremental Dynamic Analysis to assess the seismic performance of steel moment-resisting frames with fluid viscous dampers subjected to earthquake ground motions. The study systematically investigated the effects of linear and nonlinear dampers on the response of steel moment-resisting frames to earthquakes that varied in intensity and type. Both near-field and far-field motions were considered. Two different types of nonlinear dampers were investigated; one had a hardening and the other had a softening force-velocity relationship. The
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40

Giuseppe, Antonio Marzano. "Multiple-Damage State Retrofit of Steel Moment-Resisting Frames with Composite Beam Sections Using Minimal-Disturbance Arm Damper." Kyoto University, 2020. http://hdl.handle.net/2433/254524.

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41

Flores, Solano Francisco Xavier. "Influence of the Gravity System on the Seismic Performance of Special Steel Moment Frames." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/73143.

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This study investigates the influence of the gravity load resisting system on the collapse performance of Special Steel Moment Frames (SMFs). The influence was quantified using the FEMA P-695 methodology. The buildings used for this study were a 2-, 4- and 8-story SMFs taken from the ATC76-1 project where their collapse performance was already evaluated without the gravity system. The main work of this dissertation has been divided in two parts. The first part studies the influence of the gravity system when it is incorporated explicitly as part of the lateral resisting system. Aspects of the
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42

Bezabeh, Matiyas. "Lateral behaviour and direct displacement based design of a novel hybrid structure : cross laminated timber infilled steel moment resisting frames." Thesis, University of British Columbia, 2014. http://hdl.handle.net/2429/50200.

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Recently, an innovative hybrid structure has been developed as an alternative lateral-load resisting system at The University of British Columbia. The hybrid structure incorporates Cross Laminated Timber (CLT) shear panels as an infill in steel moment resisting frames (SMRFs). In order to increase the applicability of the proposed system, in this thesis, a direct displacement based design methodology has been developed and analytically validated. Initially, a nonlinear time history analysis (NLTHA) was carried out to study the lateral behaviour of the proposed hybrid structure. For this purpos
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43

Grusenmeyer, Eric. "Design comparison of ordinary concentric brace frames and special concentric brace frames for seismic lateral force resistance for low rise buildings." Kansas State University, 2012. http://hdl.handle.net/2097/14986.

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Master of Science<br>Department of Architectural Engineering<br>Kimberly Waggle Kramer<br>Braced frames are a common seismic lateral force resisting system used in steel structures. Ordinary concentric braced frames (OCBFs) and special concentric braced frames (SCBFs) are two major types of frames. Brace layouts vary for both OCBFs and SCBFs. This report examines the inverted-V brace layout which is one common arrangement. OCBFs are designed to remain in the elastic range during the design extreme seismic event. As a result, OCBFs have relatively few special requirements for design. SCBFs
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44

Metin, Tolga. "A Parametric Study On The Influence Of Semi-rigid Connection Nonlinearity On Steel Special Moment Frames." Master's thesis, METU, 2013. http://etd.lib.metu.edu.tr/upload/12615725/index.pdf.

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In practice, steel frames are analyzed and designed by assuming all beam to column connections as either rigid or simple. In real life, there are no such idealizations as rigid or simple and all connections would actually belong to a group of connections named as semi rigid connections. Various difficulties exist in modeling an accurate non-linear behavior of a steel structure, where one of these challenges is the modeling of semi-rigid behavior of connections. A detailed finite element model would take into account the complex interaction between all surfaces due to contact, friction and bolt
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45

Marucci, Derek A. "Evaluation of the Seismic Performance of Steel Moment Frames with Partially-Restrained Connections." University of Cincinnati / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1447070409.

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46

Toellner, Bradley W. "Evaluating the Effect of Decking Fasteners on the Seismic Behavior of Steel Moment Frame Plastic Hinge Regions." Thesis, Virginia Tech, 2013. http://hdl.handle.net/10919/23171.

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A series of full-scale beam-to-column moment connection tests were completed to determine the effects of powder actuated fasteners (PAF) and puddle welds on the seismic behavior of steel moment connections.  In seismic regions, PAF are currently prohibited in the connection region (referred to as the protected zone) due to the concern of low-cycle fatigue fracture.  There is almost no information available in the literature regarding the seismic behavior of moment connections with PAF or puddle welds.<br />Full-scale connection testing is the most accurate way to investigate the behavior of di
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47

Hernandez, Andrea Alejandra. "PLASTIC HINGE LOCATION EFFECTS ON THE DESIGN OF WELDED FLANGE PLATE CONNECTIONS." OpenSIUC, 2016. https://opensiuc.lib.siu.edu/theses/1863.

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Seismic design criteria have been heavily improved by the Federal Emergency Management Agency (FEMA) after the Northridge CA earthquake in 1994. Most of the damage observed was caused by brittle failure of moment frame connections. This failure was induced by the formation of the plastic hinge at undesirable locations in the beam and the column near the connection. Using welded flange plate (WFP) connections will force the formation of the plastic hinge away from the face of the column while preventing the brittle failure of the moment connection. FEMA-350 design criteria recommendations for
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48

Stevens, Ryan T. "Evaluating the Fracture Potential of Steel Moment Connections with Defects and Repairs." Thesis, Virginia Tech, 2020. http://hdl.handle.net/10919/101954.

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Steel moment frames are a popular seismic-force resisting system, but it is believed that they are susceptible to early fracture if there is a stress concentration in the plastic hinge region, also known as the protected zone. If a defect is present in this area, it may be repaired by grinding and/or welding, but little research has investigated how the repairs affect the performance of full-scale moment connections subjected to inelastic rotations. Thus, the goals of this research were to establish the performance of full-scale moment connections with repairs and defects, then develop a metho
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49

Kinali, Kursat. "Seismic Fragility Assessment of Steel Frames in the Central and Eastern United States." Diss., Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/14528.

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The Central and Eastern United States (CEUS) is a region that is characterized by low frequency-high consequence seismic events such as the New Madrid sequence of 18111812. The infrequent nature of earthquakes in the region has led to a perception that the seismic risk in the area is low, and the current building stock reflects this perception. The majority of steel-framed buildings in the CEUS were designed without regard to seismic loads. Such frames possess limited seismic resistance, and may pose an unacceptable risk if a large earthquake were to occur in the region. A key ingredient of bu
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50

Akin, Alper. "Optimum Design Of Reinforced Concrete Plane Frames Using Harmony Search Algorithm." Phd thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612293/index.pdf.

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Abstract:
In this thesis, the optimum design algorithm is presented for reinforced concrete special moment frames. The objective function is considered as the total cost of reinforced concrete frame which includes the cost of concrete, formwork and reinforcing steel bars. The cost of any component is inclusive of material, fabrication and labor. The design variables in beams are selected as the width and the depth of beams in each span, the diameter and the number of longitudinal reinforcement bars along the span and supports. In columns the width and the depth of the column section, the number and the
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