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Dissertations / Theses on the topic 'Portal frame structure'

Author: Grafiati

Published: 4 June 2021

Last updated: 9 February 2022

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1

Ülker-Kaustell, Mahir. "Some aspects of the dynamic soil-structure interaction of a portal frame bridge." Licentiate thesis, KTH, Civil and Architectural Engineering, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-11358.

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<p>For certain bridge types, the influence of soil-structure interaction (SSI) may have an important contribution to the stiffness and damping of the structural system. From a design point of view, this influence may be both conservative and non-conservative and therefore, an increased knowledge within this field could lead to better design assumptions. In terms of maintenance, assessment and upgrading of existing structures, an increased knowledge of the phenomena and parameters which govern the soil-structure interaction, may lead to more realistic models and thereby, to more precise informa

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2

Ahmed, Alia Osman Mohamed. "Design for improved seismic performance of a light gauge steel portal frame structure." Thesis, University of Strathclyde, 2013. http://digitool.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=25734.

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This research work develops a design methodology for improving the earthquake resistance of slender portal frame structures and evaluates the performance of this kind of light gauge steel portal frame structures in earthquake prone areas through the study of designed building using a finite element approach. The design of the building was carried out for a site in Sudan for peak ground acceleration 0.23g according to the Eurocodes 3 and 8 for ductility class "Low". Two analytical techniques (i.e. Static displacement pushover and dynamic time-history), were employed to assess the behaviour of t

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3

Arvidsson, Therese, and Jiajia Li. "Dynamic analysis of a portal frame railway bridge using frequency dependent soil structure interaction." Thesis, KTH, Bro- och stålbyggnad, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-40485.

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With the development of high-speed railroads the dynamic behaviour of railroad bridges is increasingly important to explore. Deeper knowledge about the influence of different factors and what should be included in a model is essential if the designer shall be able to make reliable estimates of responses in existing and new structures. One factor is the soil-structure interaction (SSI), describing how the foundation of the bridge and the soil properties affect the behavior of the bridge under dynamic loading. In this thesis, the influence of including SSI in a model of a portal frame railway br

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4

Kylén, Joakim. "2D-model of a portal frame railway bridge for dynamic analysis." Thesis, KTH, Bro- och stålbyggnad, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-37025.

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5

Sandqvist, Nils, and Marko Milicevic. "Soil-Structure Interaction Analysis of Portal Frame Railway Bridges : Numerical Analysis of Two Case Study Bridges." Thesis, KTH, Bro- och stålbyggnad, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-289329.

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This thesis concerns dynamic Soil-Structure Interaction (SSI) analysis of portal framerailway bridges. Dynamic problems are common for bridges used for high speedrailway traffic. The passing trains induce harmonic loads on the bridges causingvibration amplitudes that may cause damage to the bridge structures and userdiscomfort.Previous studies have shown that the effects of SSI are substantial for short spanportal frame bridges. The damping ratio of the system is greatly increased due to theenergy dissipation properties of the surrounding soil causing significant changes in thedynamic response

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6

Ikzer, Rita. "Dynamic Soil-Structure Interaction of a Portal Frame Railway Bridge - Numerical Analysis on a Case Study Bridge." Thesis, KTH, Bro- och stålbyggnad, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-231877.

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In the field of structural dynamics, a broader knowledge about relevant phenomena that affect the dynamic behavior of railway bridges is vital for structural engineers and design code administrators. The knowledge might benefit in an increased understanding of e.g. the resonance phenomena, and in improvements of the existing design codes. A phenomenon that has received more attention in recent times is the so called soil-structure interaction (SSI), as it may significantly contribute to the stiffness and damping of a structural system. Previous investigations have suggested that the influence

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7

Dagdelen, Turgay, and Shaho Ruhani. "Finite Element Analysis of the Dynamic Effect of Soil-Structure Interaction of Portal Frame Bridges - A Parametric Study." Thesis, KTH, Bro- och stålbyggnad, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-231119.

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In Sweden, the railway sector currently faces the challenge of developing its first high-speed railway line, in response to the need to provide faster domestic and international transport alternatives. High-speed train passages on railway bridges can cause resonance in the bridge superstructure, which induce high accelerations that should not exceed the limits stipulated in the current design code. The most common bridge type adopted in Sweden is the portal frame bridge, an integral abutment bridge confined by surrounding soil. The soil possesses inherent material damping and radiation damping

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8

Rocha, Rodrigo Tumolin [UNESP]. "On saturation phenomenon in energy harvesting based on nonlinear piezoelectric materials coupled to a portal frame foundation with ideal and non-ideal excitations." Universidade Estadual Paulista (UNESP), 2016. http://hdl.handle.net/11449/143867.

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Submitted by Rodrigo Tumolin Rocha null (digao.rocha@feb.unesp.br) on 2016-09-09T20:48:05Z No. of bitstreams: 1 Tese_FInal.pdf: 13569204 bytes, checksum: 57c9cb53f7d15296a337d3d7544e5191 (MD5)<br>Approved for entry into archive by Juliano Benedito Ferreira (julianoferreira@reitoria.unesp.br) on 2016-09-13T13:55:19Z (GMT) No. of bitstreams: 1 tumolinrocha_r_dr_bauru.pdf: 13569204 bytes, checksum: 57c9cb53f7d15296a337d3d7544e5191 (MD5)<br>Made available in DSpace on 2016-09-13T13:55:19Z (GMT). No. of bitstreams: 1 tumolinrocha_r_dr_bauru.pdf: 13569204 bytes, checksum: 57c9cb53f7d15296a337d3d

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9

Wong, Shao Young. "The structural response of industrial portal frame structures in fire." Thesis, University of Sheffield, 2001. http://etheses.whiterose.ac.uk/3005/.

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A number of recent fires in single-storey warehouses have drawn attention to a current lack of understanding about the structural response of industrial portal frame structures to elevated temperatures. This research project has investigated the subject by conducting fire tests on a scaled model and by computer modelling using the non-linear finite element program VULCAN. This program has been developed in-house by the University of Sheffield and is capable of modelling the behaviour of three-dimensional steel and composite frames at elevated temperatures. It has been validated throughout its

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10

Rudman, Chantal. "Investigation into the structural behaviour of portal frames." Thesis, Stellenbosch : University of Stellenbosch, 2009. http://hdl.handle.net/10019.1/1853.

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11

Sawan, Hassan Tayseer. "NONLINEAR STABILITY OF PORTAL FRAMES WITH ELASTIC END RESTRAINTS." Thesis, The University of Arizona, 1985. http://hdl.handle.net/10150/275410.

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12

Cunningham, Ronald. "Effects of joint continuity on tapered member steel portal framed structures." Thesis, Heriot-Watt University, 1987. http://hdl.handle.net/10399/1051.

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13

Cullen, Gavin William James. "Performance of stabilised top-hat sections in portal frames." Thesis, Queen's University Belfast, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.359060.

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14

Louw, Graeme Scott. "Lateral support of axially loaded columns in portal frame structures provided by sheeting rails." Thesis, Stellenbosch : Stellenbosch University, 2008. http://hdl.handle.net/10019.1/1585.

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Thesis (MScEng (Civil Engineering))--Stellenbosch University, 2008.<br>Doubly symmetric I-section columns are often utilised in portal frame construction. The sheeting (or cladding) is carried by sheeting rails connected to the outer flange of these columns. Although it is common practice to include the sheeting rails in the longitudinal bracing system, by connecting the sheeting rail to the cross-bracing, designers must be wary because the connection between column and sheeting rail will not prevent twisting of the columns cross-section. It has been shown ([11], [12], [17]), that by incl

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15

Beshir, Moustafa. "Robustness of composite framed structures in fire." Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/robustness-of-composite-framed-structures-in-fire(9c72a722-5b6a-477b-ac84-cd243ab73f34).html.

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This thesis presents the results of a research study to investigate the behaviour of axially restrained composite beams at ambient and elevated temperatures, and how composite beams and their connections contribute to the robustness of composite framed structures in fire. The commercial finite element analysis package (ABAQUS, 2010) was used to develop the numerical simulation models. This research includes the following four main parts: (1) validation of the simulation model; (2) behaviour of axially restrained composite beams with partial shear interaction at ambient and elevated temperature

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16

Maraveas, Chrysanthos. "Fire resistance of metal framed historical structures." Thesis, University of Manchester, 2015. https://www.research.manchester.ac.uk/portal/en/theses/fire-resistance-of-metal-framed-historical-structures(390efc49-7228-4ad1-a164-356213df96fb).html.

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This thesis focuses on fire resistance of 19th century cast iron framed structures. Based on material property data obtained from a comprehensive literature review, upper and lower bound relationships of the thermal and mechanical properties of 19th century fireproof floor construction materials have been derived. Because these materials have large variability, a sensitivity analysis has been undertaken to investigate the most effective ways of representing such variability. The sensitivity analysis has indicated that the elevated mechanical properties of cast iron should be reliably quantifie

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17

Muzeau, Jean-Pierre. "Modele de l'influence d'imperfections sur la securite des structures metalliques en comportement non lineaire : comparaison de reglements internationaux." Clermont-Ferrand 2, 1987. http://www.theses.fr/1987CLF2E378.

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Developpement d'un modele elasto-plastique geometriquement non lineaire, permettant d'evaluer les efforts internes et les deplacements d'une structure aussi pour les grandes deformations (rotules plastiques, instabilite). Comparaison de l'influence sur un indice conventionnel de la securite de divers types d'imperfections, avec application au cas d'un poteau bi-articule susceptible de flamber et au cas d'un portique a deux etages; etude de l'homogeneite des regles europeennes, britanniques et francaises en particulier, canadiennes et americaines

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18

Chen, Lu. "Robustness in fire of steel framed structures with realistic connections." Thesis, University of Manchester, 2013. https://www.research.manchester.ac.uk/portal/en/theses/robustness-in-fire-of-steel-framed-structures-with-realistic-connections(fcf4d94b-56f4-42bc-b20a-e2e497d4c14a).html.

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Joints are the most critical elements in a steel framed structure. In most design guides or codes, the joints are assumed to a have higher fire resistance than the connected structural members because of the lower temperatures in the joints. However, in severe fire conditions, a connected beam's temperature may be higher than its limiting temperature and the beam may develop catenary action when the beam’s axial shortening from large deflections becomes greater than the beam’s thermal expansion. This beam catenary action force could fracture the joints, increasing the risk of progressive colla

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19

Santos, Andreilton de Paula. "Análise estrutural de galpões atirantados de concreto pré-moldado." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-28072010-094002/.

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Os galpões de concreto pré-moldado, formados por pórticos atirantados, são muito utilizados, no Brasil. Porém, para o projeto dessas estruturas, a bibliografia é limitada. Além disso, vários critérios de projeto são adaptados dos relativos a estruturas de concreto moldado no local e de múltiplos pavimentos. O objetivo deste trabalho é contribuir para a análise desse tipo de estrutura, introduzindo conceitos que dificilmente são considerados na prática, tais como: rigidez da ligação viga-pilar, análise não-linear física e geométrica, deformação excessiva e fluência. A pesquisa foi desenvolvida

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20

Soares, Anamaria Malachini Miotto. "Análise estrutural de pórticos planos de elementos pré-fabricados de concreto considerando a deformabilidade das ligações." Universidade de São Paulo, 1998. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-17042018-091917/.

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Os sistemas pré-fabricados vêm conquistando espaço em todo o Brasil. Dentre eles, os pórticos planos de elementos pré-fabricados de concreto com sistema estrutural para telhado de duas águas, comumente denominados de galpões, tem sido amplamente aplicados. Os galpões, como a matona das estruturas pré-moldadas de concreto, apresentam suas ligações, em maior ou menor grau, deformáveis. Portanto, este trabalho refere-se ao estudo da deformabilidade de uma de suas ligações: a ligação viga-pilar executada através de consolo e chumbador, e da sua influência na distribuição dos esforços solicitantes

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21

Freitas, Rafael Rodrigues de. "Estudo de uma estrutura em pórtico para utilização em um veículo agrícola autônomo." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/18/18145/tde-19012011-131359/.

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Avanços nas pesquisas em Veículos Agrícolas Autônomos (VAA\'s) e de Robôs Agrícolas Móveis (RAM\'s) têm sido conquistados nos últimos anos. Entretanto, um número limitado de trabalhos foca o desenvolvimento das estruturas destes veículos. O presente trabalho apresenta uma revisão de materiais encontrados na literatura e no mercado. Estudou-se modelagem cinemática de veículos autônomos que possuem configurações de suas estruturas projetadas para ter mobilidade melhorada. Estudaram-se estruturas mecânicas de máquinas que atuam em vários estádios de desenvolvimento de lavouras típicas brasileiras

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22

Miotto, Anamaria Malachini. "Ligações viga-pilar de estruturas de concreto pré-moldado: análise com ênfase na deformabilidade ao momento fletor." Universidade de São Paulo, 2002. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-22062006-133702/.

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No presente trabalho foram estudadas duas ligações viga-pilar de estruturas de concreto pré-moldado com ênfase na deformabilidade ao momento fletor. A primeira é muito utilizada em galpões com sistema estrutural de pórticos para telhado com duas águas. A segunda é utilizada em estruturas de edifícios com múltiplos pavimentos. Foram realizados ensaios físicos em dois modelos de cada tipo de ligação. Com base nos resultados experimentais, foram propostos modelos analíticos, baseados no Método dos Componentes, e realizadas simulações numéricas, baseadas no Método dos Elementos Finitos, através d

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23

Susila, Gede Adi. "Experimental and numerical studies of masonry wall panels and timber frames of low-rise structures under seismic loadings in Indonesia." Thesis, University of Manchester, 2014. https://www.research.manchester.ac.uk/portal/en/theses/experimental-and-numerical-studies-of-masonry-wall-panels-and-timber-frames-of-lowrise-structures-under-seismic-loadings-in-indonesia(3ceb094b-4e6e-432a-b3de-3d4c306b0551).html.

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Indonesia is a developing country that suffers from earthquakes and windstorms and where at least 60% of houses are non-engineered structures, built by unskilled workers using masonry and timber. The non-engineered housing units developed in urban region are also vulnerable to seismic hazard due to the use of low quality of material and constructions method. Those structures are not resistant to extreme lateral loads or ground movement and their failure during an earthquake or storm can lead to significant loss of life. This thesis is concerned with the structural performance of Indonesian low

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24

Deng, Shu-Yu, and 鄧書宇. "Study on the Structural Performance of Portal Frame Constructed with Japanese Cedar Glulam." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/73758283197874040244.

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碩士<br>國立屏東科技大學<br>木材科學與設計系所<br>101<br>The purpose of the study was to investigate the structural performance of a glulam portal frame constructed with the beams and columns. Japanese cedar (Cryptomeria japonica) from domestic plantation was used in the experiment. Full-size structural glulams were made using glulam assembly machine with eight lamina for each glulam. Glue application of 250 g/m2 and assembly pressure of 980 kPa were used for making 140 × 304.8 mm glulam specimens. Beam and column member joint employed the designed metal connectors which were further divided into two differe

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25

Bryant, John Spencer. "The snap-through stability of plastically designed steel pitched-roof portal frames." Thesis, 2015. http://hdl.handle.net/10539/16467.

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Recent proposed rafter slenderness limits, to prevent snap-through of plastically designed pitched-roof portal frames, incorporate the elastic snap-through buckling load of such frames. It has been suggested that the elastic snap-through buckling load used in the proposals is over-estimated making these slenderness limits unconservative. This is supported by a more rigorous elastic analysis. To test the proposals, model frames lying on or close to the slenderness limits were tested to failure in the laboratory. Frame dimensions were chosen so that the frames were only susceptible to s

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