Study On the Seismic Response of the Extradosed Cable-Stayed Bridges with Continuous System for Different Seismic-Isolated Design Scheme

The definition of the spatial variability of the ground motion (SVGM) is a complex and multi-parametric problem. Its effect on the seismic response of cable-stayed bridges is important, yet not entirely understood to date. This work examines the effect of the SVGM on the seismic response of cable-stayed bridges by means of the time delay of the ground motion at different supports, the loss of coherency of the seismic waves, and the incidence angle of the seismic waves. The focus herein is the effect of the SVGM on cable-stayed bridges with various configurations in terms of their length and of design parameters such as the pylon shape and the pylon–cable system configuration. The aim of this article is to provide general conclusions that are applicable to a wide range of canonical cable-stayed bridges and to contribute to the ongoing effort to interpret and predict the effect of the SVGM in long structures. This work shows that the effect of the SVGM on the seismic response of cable-stayed bridges varies depending on the pylon shape, height, and section dimensions; on the cable-system configuration; and on the response quantity of interest. Furthermore, the earthquake incidence angle defines whether the SVGM is important to the seismic response of the cable-stayed bridges. It is also confirmed that the SVGM excites vibration modes of the bridges that do not contribute to their seismic response when identical support motion is considered.

Download Full-text

PARAMETRIC STUDY ON STEEL TOWER SEISMIC RESPONSE OF CABLE-STAYED BRIDGES UNDER GREAT EARTHQUAKE GROUND MOTION

STRUCTURAL ENGINEERING / EARTHQUAKE ENGINEERING ◽

10.2208/jsceseee.20.25s ◽

2003 ◽

Vol 20 (1) ◽

pp. 25S-41S ◽

Cited By ~ 7

Author(s):

Shehata E. ABDEL RAHEEM ◽

Toshiro HAYASHIKAWA

Keyword(s):

Seismic Response ◽

Ground Motion ◽

Parametric Study ◽

Great Earthquake ◽

Earthquake Ground Motion ◽

Cable Stayed Bridges

Download Full-text

Influence of cable vibration on seismic response of cable-stayed bridges

Canadian Journal of Civil Engineering ◽

10.1139/l95-116 ◽

1995 ◽

Vol 22 (5) ◽

pp. 1001-1020 ◽

Cited By ~ 20

Author(s):

Raju Tuladhar ◽

Walter H. Dilger ◽

Mamdouh M. Elbadry

Keyword(s):

Seismic Response ◽

Seismic Behaviour ◽

Cable Vibration ◽

Fundamental Frequencies ◽

Parametric Studies ◽

Modulus Method ◽

Cable Vibrations ◽

Equivalent Modulus ◽

Response Modelling ◽

Cable Stayed Bridges

In cable-stayed bridges, modelling the cables is of particular significance for the seismic behaviour of the structure. The common practice of modelling a cable by a single truss element is inadequate for seismic response calculations because it essentially precludes the lateral cable vibration modes. The present paper studies the influence of cable vibrations on the seismic response of cable-stayed bridges. Three bridge examples with different spans and properties were used. Cable vibrations are accounted for through the use of multiple links for each cable. Cable vibration effects are found to be significant for seismic response calculations, particularly when the cable fundamental frequencies are overlapping with the first few frequencies of the bridge. Parametric studies are conducted with regard to the number of links per cable, the effect of the modulus of elasticity of the cables, and different earthquakes on the bridge response. Modelling the cables by two links per cable such that at least the fundamental modes of the cable vibrations are represented can significantly account for the effect of cable vibrations. It is also observed that the equivalent modulus method cannot in any way account for the cable vibration effects. Key words: cable vibration, dynamic analysis, equivalent modulus, multiple links, seismic response, cable-stayed bridge.

Download Full-text

Phase I Benchmark Control Problem for Seismic Response of Cable-Stayed Bridges

Journal of Structural Engineering ◽

10.1061/(asce)0733-9445(2003)129:7(857) ◽

2003 ◽

Vol 129 (7) ◽

pp. 857-872 ◽

Cited By ~ 119

Author(s):

S. J. Dyke ◽

J. M. Caicedo ◽

G. Turan ◽

L. A. Bergman ◽

S. Hague

Keyword(s):

Phase I ◽

Control Problem ◽

Seismic Response ◽

Cable Stayed Bridges

Download Full-text

Ground motion spatial variability effects on seismic response control of cable-stayed bridges

Earthquake Engineering and Engineering Vibration ◽

10.1007/s11803-011-0045-5 ◽

2011 ◽

Vol 10 (1) ◽

pp. 37-49 ◽

Cited By ~ 19

Author(s):

Shehata E. Abdel Raheem ◽

Toshiro Hayashikawa ◽

Uwe Dorka

Keyword(s):

Spatial Variability ◽

Seismic Response ◽

Ground Motion ◽

Response Control ◽

Seismic Response Control ◽

Cable Stayed Bridges

Download Full-text

Stochastic Response of a Coastal Cable-Stayed Bridge Subjected to Multi-Dimensional and Multi-Supported Earthquake and Waves

Journal of Earthquake and Tsunami ◽

10.1142/s1793431121500068 ◽

2020 ◽

pp. 2150006

Author(s):

SIBO MENG ◽

YANG DING

Keyword(s):

Seismic Response ◽

Water Structure ◽

Stochastic Dynamic ◽

Stochastic Response ◽

Structure Interaction ◽

Cable Stayed Bridge ◽

Stochastic Seismic Response ◽

Influence Of Water ◽

Underwater Structure ◽

Cable Stayed Bridges

In this paper, a stochastic dynamic analysis method for cable-stayed bridges subjected to multi-dimensional and multi-supported earthquake and waves is established based on the pseudo-excitation method. The Monte Carlo method is used to analyze the influence of excitation nonlinearity on the bridge structure response, and the applicability of this method is verified. Stochastic response characteristic of coastal cable-stayed bridges subjected to multi-dimensional and multi-supported earthquake and waves is studied. The influence of water–structure interaction on the stochastic seismic response of main components of the cable-stayed bridge is described, and the influence of key parameters is analyzed. The results show that the influence of excitation nonlinearity on the response of the cable-stayed bridge can be neglected. A greater energy input caused by the rigid additional mass of the hydrodynamic pressure is the reason for the increasing of the seismic response. The influence of stochastic response of the underwater structure of the tower is changed with the site conditions. For the ground motion acceleration input energy being distributed in the high-frequency domain, the water–structure interaction has a greater effect on stochastic seismic response of the underwater structure of the tower. The influence of water–structure interaction on the stochastic seismic response of the underwater structure of the cable-stayed bridge increases with the increasing of the wave height and water depth.

Download Full-text