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Dissertations / Theses on the topic 'Bridge stiffness'

Author: Grafiati

Published: 4 June 2021

Last updated: 17 February 2022

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1

Toro, Andrea del Pilar. "Effect of Lateral Stiffness on Bridge Deck Performance." UNF Digital Commons, 2015. http://digitalcommons.unf.edu/etd/587.

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The use of the empirical deck design method has increased its acceptance due to the economic advantages that it presents when compared to its counterpart, the traditional method. This can be attributed to the fact that the empirical method provides an appropriate design where the deck withstands stress not only due to the steel reinforcement but to an implicit arching membrane stress set-up as an effect of the lateral restraint surrounding the deck slab known as Compressive Membrane Action (CMA). It has been proved through research that most design codes underestimate the strength of laterally

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2

Bozorgzadeh, Azadeh. "Effect of structure backfill on stiffness and capacity of bridge abutments." Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2007. http://wwwlib.umi.com/cr/ucsd/fullcit?p3274986.

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Thesis (Ph. D.)--University of California, San Diego, 2007.<br>Title from first page of PDF file (viewed October 2, 2007). Available via ProQuest Digital Dissertations. Vita. Includes bibliographical references (p. 260-265).

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3

Zhou, Aixi. "Stiffness and Strength of Fiber Reinforced Polymer Composite Bridge Deck Systems." Diss., Virginia Tech, 2002. http://hdl.handle.net/10919/29210.

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This research investigates two principal characteristics that are of primary importance in Fiber Reinforced Polymer (FRP) bridge deck applications: STIFFNESS and STRENGTH. The research was undertaken by investigating the stiffness and strength characteristics of the multi-cellular FRP bridge deck systems consisting of pultruded FRP shapes. A systematic analysis procedure was developed for the stiffness analysis of multi-cellular FRP deck systems. This procedure uses the Method of Elastic Equivalence to model the cellular deck as an equivalent orthotropic plate. The procedure provides a pra

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4

Tavares, Rui Afonso. "Influence of the Vertical Support Stiffness on the Dynamic Behavior of High-Speed Railway Bridges." Thesis, KTH, Bro- och stålbyggnad, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-36795.

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5

Bornet, Lucie. "Influence of the ballast on the dynamic properties of a truss railway bridge." Thesis, KTH, Bro- och stålbyggnad, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-125346.

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To deal with a rapid development of high-speed trains and high-speed railways, constant improvement of the railway infrastructure is necessary and engineers are continuously facing challenges in order to design efficient and optimized structures. Nowadays, more and more railway bridges are built and thus, they require the engineers’ attention both regarding their design and their maintenance. A comprehensive knowledge of the infrastructures and the trains is crucial: their behaviours need to be well known. However, today, the ballast - the granular material disposed on the track and on which t

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6

Rashid, Shahbaz. "Parametric study of bridge response to high speed trains, ballasted track on concrete bridges." Thesis, KTH, Bro- och stålbyggnad, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-99385.

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When a train enters a bridge, passenger sitting inside will feel a sudden bump in the track, which not only affect the riding comfort of the passengers but also put a dynamic impact on the bridge structure. Due to this impact force, we have very serious maintenance problems in the track close to the bridge structure. This sudden bump is produced when train travelling on the track suddenly hit by a very stiff medium like bridge structure. In order to reduce this effect, transition zones are introduced before the bridge so that the change in stiffness will occur gradually without producing any b

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7

Mahan, Amir. "Dynamic Response of a Tied Arch Bridge to a Choice of Loading & Operation Conditions : A case study of the Urmia Lake Bridge." Thesis, KTH, Bro- och stålbyggnad, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-36791.

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8

Llorens, García Andrea. "Traffic induced vibrations on a portal frame railway bridge : Comparison of theory and measurements." Thesis, KTH, Bro- och stålbyggnad, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-36351.

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The effect of different vertical support stiffness of a frame railway bridge is investigated in this study. Due to the dynamic loads of the high speed trains that run over the railway bridges, the response of these structures is far from the static effects. The frame bridge chosen for this study is the Rössjö bridge, located on the Bothnia Line, the first high speed railway built in Sweden. Using a theoretical model of this bridge, the eigenfrequencies of the structure and the vertical accelerations of the deck are evaluated. Not only different vertical support stiffness, but also different tr

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9

Alzlfawi, Abdullah Hamoud. "EFFECT OF SLAB AND PIER CONNECTION ON TRANSVERSE CRACKING IN STRUCTURAL SLAB BRIDGES." University of Akron / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1525450625325638.

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10

Berglin, Alexander. "Short-term deformations in clay under a formwork during the construction of a bridge : A design study." Thesis, KTH, Jord- och bergmekanik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-212060.

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During the casting of a concrete bridge deck, the temporary formwork is causing the underlying ground to deform if a shallow foundation solution is used. There are often demands on the maximum deformation of the superstructure when designing the foundation for the formwork. To keep the deformations within the desired limits, several ground improvement methods like deep mixing columns or deep foundation methods like piling can be used. Permanent ground improvement methods are however expensive, and far from always needed. To reduce the need for unnecessary ground improvements, it is crucial to

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11

Brooker, Caden B. "Field Experimentation and Finite Element Analysis of Prominent Drive-by Bridge Inspection Techniques." Ohio University / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1617056113435238.

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12

Widarda, Dina Rubiana. "Longitudinal forces in continuously welded rails due to nonlinear track-bridge interaction for loading sequences." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2009. http://nbn-resolving.de/urn:nbn:de:bsz:14-ds-1238081328011-05497.

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The use of continuously welded rails (CWR) governs the longitudinal stress caused by seasonal temperature changes, bending of supporting structure and braking/accelerating due to passing trains. Those three loads have been regulated in Eurocode1 and accomplished by the national codes like DIN Fb-101 in Germany. An additional loading case identified and treated in this thesis is the load due to a change of the coupling stiffness in longitudinal direction between the track and bridge. This additional load occurs as a consequence of the employment of a nonlinear stiffness law which increases the

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13

Widarda, Dina Rubiana. "Longitudinal forces in continuously welded rails due to nonlinear track-bridge interaction for loading sequences." Doctoral thesis, Technische Universität Dresden, 2008. https://tud.qucosa.de/id/qucosa%3A23616.

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The use of continuously welded rails (CWR) governs the longitudinal stress caused by seasonal temperature changes, bending of supporting structure and braking/accelerating due to passing trains. Those three loads have been regulated in Eurocode1 and accomplished by the national codes like DIN Fb-101 in Germany. An additional loading case identified and treated in this thesis is the load due to a change of the coupling stiffness in longitudinal direction between the track and bridge. This additional load occurs as a consequence of the employment of a nonlinear stiffness law which increases the

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14

Suza, Dominik. "Dočasné zesilování silničních mostů." Doctoral thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-390273.

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Bridge strengthening is frequently associated with costly, long-term reconstruction. In some cases the bridge load capacity is sufficient for standard traffic, but requirements for an extremely heavy vehicle can exceed the maximal bridge load capacity. These vehicles normally weigh hundreds of tons. Moreover, well-known bridge strengthening technologies are not efficient and economical for this special load case. This doctoral thesis presents a short-term bridge strengthening method using a temporary support structure for the assistance of the existing bridge carrying structure. Although this

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15

Okánik, Michal. "Statická analýza mostní konstrukce: Černý most v Hodoníně." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-372210.

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The diploma thesis deals with static analysis of the Black bridge in Hodonín city. The creation of the numerical model in ANSYS sw. is described according to the existing project documentation, followed by the application of loading and boundary conditions (including the solution of foundation soil placed on the piles). The selection of the loading is used according ČSN EN standards for analysis and verification of the main construction parts. This work also includes verification of the piles deformations calculated both in ANSYS sw. and by the direct stiffness method (MS Excel is used) and th

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16

Fiedlerová, Lucie. "Nosná ocelová konstrukce kryté lávky pro pěší mezi budovami výukového areálu." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2012. http://www.nusl.cz/ntk/nusl-225524.

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The subject of this master’s thesis is to design the supporting steel structure covered pedestrian bridge between the learning area buildings A and D of the Faculty of Civil Engineering, street Veveří 95 in Brno. The construction is designed as a bridge rod spatial structure with two main girders. The girders are a combination Vierendeel girder and truss structure. The girders are connected at the level of the upper and lower band by a crosspiece. The horizontal stiffness of the upper and lower surface structure is ensured by bracing. The upper surface of the pedestrian bridge is horizontal in

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17

Pradono, Mulyo Harris. "Seismic Safety Enhancement of Cable-stayed Bridges with Pseudo Negative Stiffness Dampers." 京都大学 (Kyoto University), 2003. http://hdl.handle.net/2433/138485.

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18

Syk, Annelie, and Erik Axelsson. "Effect of axle load spreading and support stiffness on the dynamic response of short span railway bridges." Thesis, KTH, Bro- och stålbyggnad, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-137118.

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In this thesis the effect of axle load spreading through ballast and the effect of support stiffness has been investigated on short span railway bridges. Two types of bridges, simply supported bridges and bridges with integrated backwalls, have been modeled with 2D beam elements. When analyzing the load spreading effect, two types of load shapes have been considered. The first one is the load shape proposed in Eurocode where the axle load is modeled with three point loads where 50% of the axle load acts on the sleeper located underneath the wheel and 25% on the two adjacent sleepers, respectiv

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19

Rabbia, Laurent. "Nouvelle filière technologique pour micro-commutateurs parallèles capacitifs micro-ondes sur membrane diélectrique." Phd thesis, Université Paul Sabatier - Toulouse III, 2005. http://tel.archives-ouvertes.fr/tel-00011430.

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Ce mémoire traite de l'élaboration d'une nouvelle filière technologique pour micro-commutateurs parallèles capacitifs micro-ondes sur membrane diélectrique. Les micro-commutateurs sont des ponts à air métalliques actionnés électrostatiquement et structurés par un micro-usinage de surface. Un micro-usinage de volume est réalisé pour obtenir une membrane sur laquelle les circuits fabriqués sont faibles pertes. Le chapitre I présente le procédé technologique global utilisé. Dans un premier temps nous détaillons les briques de base constituant chacun des procédés des deux faces de la plaquette, la

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20

Wang, Weihua active 2013. "A study of stiffness of steel bridge cross frames." 2013. http://hdl.handle.net/2152/21218.

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Cross frames are critical components in steel bridge systems. Cross frames brace girders against lateral torsional buckling and assist in distributing live loads to girders during the service life of the bridge. In curved bridges, cross frames also serve as primary structural members in resisting torsion generated by the traffic loads. The conventional cross frames are often constructed in X- or K- type shapes with steel angle sections. However, the actual stiffness of these cross frames are not well understood or quantified, leading to potentially inaccurate prediction of bridge behavior an

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21

Battistini, Anthony David. "Stiffness and fatigue behavior of cross frames for steel bridge applications." Thesis, 2014. http://hdl.handle.net/2152/27131.

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Cross frames are critical for the stability of straight and curved steel bridges. Conventional cross frames are often fabricated from steel angles which are welded to gusset plates through one leg only. Due to this eccentric connection, these angles have substantial bending at the connection that can reduce the member stiffness and can potentially decrease fatigue performance. Because of the low buckling strength, cross frames with angle diagonals are often designed as tension-only systems, therefore increasing the necessary steel to be an effective brace. Improved behavior may result if co

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22

Battistini, Anthony David. "Skewed Cross Frame Connection Stiffness." Thesis, 2009. http://hdl.handle.net/2152/ETD-UT-2009-12-670.

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Cross frames and diaphragms are essential to the stability of straight steel girder bridge systems as they help to resist lateral torsional buckling during construction and horizontal loading conditions. In skewed bridge systems, cross frames are often oriented parallel to the supports and hence, at an angle to the girder. To facilitate construction fit-up, plates, bent to match the skew angle, form the cross frame to stiffener connection. While the bent plate connection is a simple solution, it could introduce undesirable flexibility into the system, potentially compromising the effective

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23

Fan, Jin-Chang, and 范進昌. "Static and Dynamic Analysis of Cable-Stayed Bridge with Reduced Girder Stiffness." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/14905440351281990308.

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碩士<br>中原大學<br>土木工程研究所<br>98<br>Cable-stayed bridge is a kind of bridge structure subjected to tension and compression. Cables are used to pull the deck to reduce the bending moments on the deck and transfer the compression to the pylon. Therefore, this type of bridge can achieve the goal of saving material and increase the effectiveness of the structural systems. This study aims to study the structural behavior of the bridge. Moreover, in order to follow the trend of creating better landscape in the future, different shape of pylon and deck of Cable-stayed bridges are analyzed and examined car

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24

Fu, Feng-Wei, and 傅豐椲. "Improvement of Structure Stiffness for Bridge TypeMachining Center Using Cross-Rib Design." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/29544144836803577999.

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碩士<br>國立高雄應用科技大學<br>模具工程系<br>99<br>This study used finite element method (FEM) for strengthening the main structure of bridge type machining center. The improvement of the structure stiffness with the idea of cross-ribs and analysis of casting CAE was verified. The bridge type machining center is including gantry, table, spindle housing, bed, and so on. In manufacturing process cutting loading have to be covered by the structure of gantry, also call the load of “structure stiffness.” The main point of this research is that the design of cross-ribs will improve structure stiffness and redu

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25

Wu, Fong-Bin, and 吳峰賓. "Indirect Approach for Measuring the Bridge Frequencies in Consideration of the Road Surface Roughness and Nonlinear Vehicle Stiffness." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/57337600883591275058.

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碩士<br>臺灣大學<br>土木工程學研究所<br>98<br>The objective of this study is to investigate the feasibility of extracting the bridge frequencies from the dynamic responses recorded for a vehicle during its passage over the bridge, in consideration of the road surface roughness and nonlinear vehicle stiffness, and to examine if the response components corresponding to the bridge frequencies can be decomposed from vehicle acceleration responses by Ensemble Empirical Mode Decomposition (EEMD). The approach for extracting the bridge frequencies from the dynamic responses of a vehicle is referred to as indirect

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26

Huang, JuiSheng, and 黃瑞昇. "Diagnosing Structural Stiffness of Bridges by a Moving Load." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/hf3e5b.

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碩士<br>國立臺北科技大學<br>機電整合研究所<br>101<br>In this study, the use of dissipative energy for diagnosing structural stiffness of the bridges. Use new identification method to calculate dissipative energy for bridges, the method is accomplished by processing the response signal with respect to that of input. In other word, one is measure the steady state response signal of the system, which is excited by an input sinusoidal signal. Once the response signal is obtained. It can be modulated by two different reference signals. The required dissipative energy can be thus extracted from the modulated by the

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27

Lin, Li-Yuan. "Identification of stiffness degradation of steel highway bridges using wavelet analysis." 2007. http://proquest.umi.com/pqdweb?did=1397912761&sid=7&Fmt=2&clientId=39334&RQT=309&VName=PQD.

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Thesis (Ph.D.)--State University of New York at Buffalo, 2007.<br>Title from PDF title page (viewed on Feb. 26, 2008) Available through UMI ProQuest Digital Dissertations. Thesis adviser: Lee, George. C. Includes bibliographical references.

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28

Yip, Chih-Ming, and 葉致鳴. "Plastic Analysis of Cable-Stayed Bridges by using Increment-Varied Stiffness Method." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/20917373508750136760.

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碩士<br>中原大學<br>土木工程研究所<br>95<br>The aim of this thesis concerns with the plastic analysis of cable-stayed bridges by using Increment-Varied Stiffness Method. A finite element computation procedure using Increment-Varied Stiffness Method is set up for the nonlinear plastic analysis of such kind of structures to evaluate the ultimate load-carrying capacity. Several simple rigid frames, truss and three different types of cable-stayed bridges are selected in this thesis. In the Increment-Varied Stiffness method the nonlinear plastic problem is treated as a piecewise linearized problem. The nonlinea

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29

Sahasrabudhe, Sanjay Suhas. "Semi-active control of sliding isolated buildings and bridges with variable stiffness and damping systems." Thesis, 2002. http://hdl.handle.net/1911/18128.

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Sliding isolation systems are effective in strong earthquakes; however, base displacements can be excessive in near source ground motions. Although passive nonlinear dampers can limit base displacements, the isolation forces, superstructure interstory drifts, and superstructure accelerations will be higher. Use of smart devices such as Magneto-rheological (MR) dampers, and semi active independently variable stiffness (SAIVS) devices in the isolation system may provide significant advantages. Independently varying damping and stiffness systems, used separately and together in sliding isolated b

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