Pushover analysis for the seismic response prediction of cable-stayed bridges under multi-directional excitation

Cámara, Alfredo; Suárez, Miguel Ángel Astiz

doi:10.1016/j.engstruct.2012.03.059

Cited by 60 publications

(25 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…11 This may be explained by the simultaneous contribution of the seismic excitation in the three dimensions in vibration modes with strong coupling between the deck and the towers, similar to the one shown in Fig. 2.…”

mentioning

confidence: 83%

“…This interaction is taken into account in the coupled non-linear static pushover (CNSP). 11 The load patterns of the most significant longitudinal and transverse vibration modes are combined in CNSP, and problematic cracking associated with longitudinal reinforcement yielding at key sections in the tower legs (normally at the base) was observed when the damage ratio was above 25%. It is suggested that when the structure is subject to the design ground motion, the percentage of energy dissipated by plasticity in the tower sections should remain below Ω max = 25%.…”

mentioning

confidence: 99%

“…There are several analytical strategies available for designers to study the seismic behaviour of structures in the elastic 10 and inelastic ranges, 11 with different levels of accuracy and associated computational costs. The most rigorous procedure when large inelastic response is expected is the non-linear response history analysis (NL-RHA).…”

mentioning

confidence: 99%

See 2 more Smart Citations

Analysis and Control of Cable-Stayed Bridges Subject to Seismic Action

Cámara

Suárez

2014

Structural Engineering International

View full text Add to dashboard Cite

This is the accepted version of the paper.This version of the publication may differ from the final published version. Permanent repository link AbstractCable-stayed bridges are key points in transport networks and at present one of the most challenging structures for the civil engineering community. The integrity of these bridges should be guaranteed even under extremely large earthquakes. This paper begins with a discussion of the advantages of a new non-linear static "Pushover" procedure that includes the three-dimensional contribution of the governing vibration modes. The efficacy and the accuracy of the proposed Pushover in the non-linear seismic analysis of bridges with significant coupling between the towers, deck and cable system is verified. In the second part of this paper, the seismic responses of several cable-stayed bridges have been studied, verifying the influence of the tower shape, cable arrangement and the main span length on the structural behaviour under strong ground motions. Severe damage is identified at critical tower sections by means of extensive non-linear dynamic analyses. Finally, retrofit solutions with viscous dampers (VDs) and yielding metallic dampers (MDs) connecting the deck and the tower in the transverse direction are explored. The proposed connection with dampers effectively prevents yielding of the reinforcement and cracking in the tower legs.Keywords: cable-stayed bridges; nonlinear seismic behaviour; retrofit; dampers; pushover analysis; tower shape; main span.vibrations, 3,4 spatial variability of the seismic excitation 5 and the use of seismic devices.6 Few studies are focused on the response of cable-stayed bridge towers to seismic effects. The towers play a paramount role in the global integrity of the structure and should survive large earthquakes.7 Guidelines on the conceptual design of the towers of cable-stayed bridges to withstand seismic ground movements have been provided in Ref. [8]. The seismic response of a relatively small bridge (284 m span) with metallic towers for three different shapes has been studied in Ref. [9]. However, there is a need for parametric studies on the seismic behaviour of cable-stayed bridge towers with different dimensions and cable arrangements. The present paper is focused on two essential aspects of the project of cable-stayed bridges in seismic areas that are relevant to engineers: (1) the inelastic analysis and (2) the design of the towers and their connection with the bridge deck.The selection of the analysis strategy is an important step that should be decided in accordance with the relevance of the structure, the seismic risk and the stage of the construction project. There are several analytical strategies available for designers to study the seismic behaviour of structures in the elastic 10 and inelastic ranges, 11 with different levels of accuracy and associated computational costs. The most rigorous procedure when large inelastic response is expected is the non-linear response history analysis (NL-RHA). Unfortunately, the...

show abstract

mentioning

confidence: 83%

mentioning

confidence: 99%

See 1 more Smart Citation

Analysis and Control of Cable-Stayed Bridges Subject to Seismic Action

Cámara

Suárez

2014

Structural Engineering International

View full text Add to dashboard Cite

show abstract

“…Yapının belirli yatay yükler altında artımsal olarak adım adım itilmesi esasına dayanan statik artımsal itme analizinde, yapının doğrusal olmayan davranışı daha pratik bir şekilde belirlenebilmektedir (Jiang vd., 2010;Reyes ve Chopra, 2011;Sucuoğlu ve Günay, 2011;Mortezaei vd., 2011;Kreslin ve Fajfar, 2012;Camara ve Astiz, 2012;Alıcı vd. 2013;Kaatsız ve Sucuoğlu, 2014 …”

Section: Introductionunclassified

Farklı Deprem Düzeyleri İçin Betonarme Çerçevelerin Plastik Enerji İstemlerinin Belirlenmesi

Uçar¹,

Merter²

2015

Gümüşhane Univ. Fen Bilim. Enst. Derg.

View full text Add to dashboard Cite

show abstract

“…Among the most important nonlinear effects to consider in the design of a cable stayed bridge are cables and deck wind vibrations [3,4], seismic analysis considering soil-structure interaction and multiple base excitations [5,6], and pushover analysis to determine the resistant capacity [7]. Due to the dimensions and foundation soil of the bridge of Talavera de la Reina, in the seismic analysis performed have not been considered the effects of soil structure interaction and multiple base excitation.…”

Section: Introductionmentioning

confidence: 99%

Seismic analysis of a cable stayed bridge in Talavera de la Reina, Spain

Hernández¹,

Romera²,

Pereira³

et al. 2013

WIT Transactions on the Built Environment

View full text Add to dashboard Cite

A cable stayed bridge with a signature design destined to be an icon in the region has been recently built in the city of Talavera de la Reina in central Spain. Although Spain is a country with no significant seismic peril, the recent earthquake that took place in the city of Lorca in the year 2011, with a Richter magnitude value of 5.1, has promoted studies of several structures of social and economical relevance. Therefore, a comprehensive analysis of seismic effects of the mentioned cable stayed bridge has been performed.The study carried out included seismic analysis in both the frequency and time domain, considering several sources of nonlinearity as cable sag, cable prestress distribution and large displacements. Nonlinear seismic time history analyses were conducted considering artificial earthquakes in the three spatial directions.In addition to the dynamic analysis a computer video was produced showing the expected deformation of the bridge for each of the natural modes of vibration and the seismic event. The bridge model developed for the visualization is very precise and contains many details, so the perception of the viewer of the computer video will be very similar to what will be seen if a real earthquake would happen in the bridge site.

show abstract

Pushover analysis for the seismic response prediction of cable-stayed bridges under multi-directional excitation

Cited by 60 publications

References 15 publications

Analysis and Control of Cable-Stayed Bridges Subject to Seismic Action

Analysis and Control of Cable-Stayed Bridges Subject to Seismic Action

Farklı Deprem Düzeyleri İçin Betonarme Çerçevelerin Plastik Enerji İstemlerinin Belirlenmesi

Seismic analysis of a cable stayed bridge in Talavera de la Reina, Spain

Contact Info

Product

Resources

About