Response to Seismic Effect on Cable Stayed Bridges with Different Cable System Under Consideration of SSI

2021 ◽  
pp. 757-772
Author(s):  
J. H. Gabra ◽  
Atul K. Desai
Keyword(s):  
Seismic Effect ◽  
Cable System ◽  
Cable Stayed Bridges

scholarly journals Multi-angle and nonuniform ground motions on cable-stayed bridges

2021 ◽  
pp. 875529302110513
Author(s):  
Eleftheria Efthymiou ◽  
Alfredo Camara
Keyword(s):  
Seismic Response ◽  
Ground Motion ◽  
Seismic Waves ◽  
Incidence Angle ◽  
Design Parameters ◽  
System Configuration ◽  
Cable System ◽  
Parametric Problem ◽  
Wide Range ◽  
Cable Stayed Bridges

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.

scholarly journals Dynamic Analysis of Cable-Stayed Bridges Affected by Accidental Failure Mechanisms under Moving Loads

2013 ◽  
Vol 2013 ◽  
pp. 1-20 ◽  
Author(s):  
Fabrizio Greco ◽  
Paolo Lonetti ◽  
Arturo Pascuzzo
Keyword(s):  
Failure Mode ◽  
Structural Characteristics ◽  
Sensitivity Analyses ◽  
Moving Loads ◽  
Cable System ◽  
System Sensitivity ◽  
Design Variables ◽  
Mode Characteristics ◽  
Dynamic Amplification ◽  
Cable Stayed Bridges

The dynamic behavior of cable-stayed bridges subjected to moving loads and affected by an accidental failure in the cable suspension system is investigated. The main aim of the paper is to quantify, numerically, the dynamic amplification factors of typical kinematic and stress design variables, by means of a parametric study developed in terms of the structural characteristics of the bridge components. The bridge formulation is developed by using a geometric nonlinear formulation, in which the effects of local vibrations of the stays and of large displacements in the girder and the pylons are taken into account. Explicit time dependent damage laws, reproducing the failure mechanism in the cable system, are considered to investigate the influence of the failure mode characteristics on the dynamic bridge behavior. The analysis focuses attention on the influence of the inertial characteristics of the moving loads, by accounting coupling effects arising from the interaction between girder and moving system. Sensitivity analyses of typical design bridge variables are proposed. In particular, the effects produced by the moving system characteristics, the tower typologies, and the failure mode characteristics involved in the cable system are investigated by means of comparisons between damaged and undamaged bridge configurations.

Optimum crossing cable system in multi-span cable-stayed bridges

2018 ◽  
Vol 160 ◽  
pp. 342-355 ◽  
Author(s):  
C. Cid ◽  
A. Baldomir ◽  
S. Hernández
Keyword(s):  
Cable System ◽  
Cable Stayed Bridges

Effects of partially earth-anchored cable system on dynamic wind response of cable-stayed bridges

2008 ◽  
Vol 11 (6) ◽  
pp. 441-453 ◽  
Author(s):  
Jeong-Hun Won ◽  
Ji-Hyun Yoon ◽  
Se-Jun Park ◽  
Sang-Hyo Kim
Keyword(s):  
Cable System ◽  
Wind Response ◽  
Cable Stayed Bridges

scholarly journals On the effect of multi-angle and spatially variable ground motions on cable-stayed bridges

2020 ◽  
Author(s):  
Eleftheria Efthymiou ◽  
Alfredo Camara
Keyword(s):  
Seismic Response ◽  
Seismic Waves ◽  
Incidence Angle ◽  
Design Parameters ◽  
Cable System ◽  
Parametric Problem ◽  
Wide Range ◽  
Support Excitation ◽  
Definition Of ◽  
Cable Stayed Bridges

The definition of the Spatial Variability of the Ground Motion (SVGM) is a com- plex and multi-parametric problem. Its effect on the seismic response of long and multiply-supported structures in general, and on cable-stayed bridges, in particular, is important but not entirely understood. This work examines the effect of the SVGM on the seismic response of cable-stayed bridges by means of the time delay of the earth- quake at different supports and of the loss of coherency of the seismic waves. The focus herein is the effect of the SVGM on cable-stayed bridges with various configu- rations in terms of their length and of design parameters, such as the pylon shape and the pylon–cable system configuration, combined with the influence of the incidence angle of the seismic waves. The aim of this paper is to provide general conclusions that are applicable to a wide range of cable-stayed bridges and to contribute to the ongoing effort to interpret and predict the effect of the SVGM. It has been found that the influence of the multi-support excitation on the seismic response of the bridges is strongly affected by the shape of the pylons, by the pylon–cable system configura- tion and by and the earthquake’s incidence angle. It is also observed that the SVGM excites vibration modes of the bridges that do not contribute to their seismic response when identical support motion is considered.

scholarly journals Parametric Analysis of Multi-Span Cable-Stayed Bridges Under Alternate Loads

2019 ◽  
Vol 14 (4) ◽  
pp. 543-567
Author(s):  
Hiram Arellano ◽  
Roberto Gomez ◽  
Dante Tolentino
Keyword(s):  
Parametric Analysis ◽  
Type System ◽  
Cable System ◽  
Cable Stayed Bridge ◽  
State Of Stress ◽  
Different Types ◽  
Live Loads ◽  
Cable Stayed Bridges

The influence of the stiffness of piers, pylons and deck in the behaviour of multi-span cable-stayed bridges under alternate live loads is analysed. The variation of these parameters is discussed considering both a harp cable system and a fan cable system. Different types of connections between pier-pylon and deck are also considered. Based on the behaviour of a three-span cable-stayed bridge, the variation of pier-pylon stiffness and deck stiffness was analysed. A similar state of stress and deflections was obtained for both a three-span and a multi-span cable-stayed bridge. The study shows that the harp type system presents advantages compared to fan type in terms of its behaviour under alternate live loads considering the same values of deck stiffness and pier-pylon stiffness. It is demonstrated that the resistant mechanism of multi-span cable- stayed bridges is provided by the pier-pylon element.

Sign in / Sign up

Export Citation Format

Share Document