Seismic response of gravity walls using Newmark-type modelling with double-support excitation

2010 ◽  
pp. 141-148
Author(s):  
M. Corigliano & ◽  
C.G. Lai ◽  
R. Pasquali
Keyword(s):  
Seismic Response ◽  
Double Support ◽  
Support Excitation

scholarly journals Influence of Multiple-Support Excitation on Seismic Response of Reinforced Concrete Arch Bridges

2019 ◽  
Vol 10 (1) ◽  
pp. 17 ◽  
Author(s):  
Marta Savor Novak ◽  
Damir Lazarevic ◽  
Josip Atalic ◽  
Mario Uros
Keyword(s):  
Reinforced Concrete ◽  
Spatial Variation ◽  
Seismic Response ◽  
Ground Motion ◽  
Seismic Analysis ◽  
Numerical Study ◽  
Relative Significance ◽  
Multiple Support ◽  
Arch Bridges ◽  
Support Excitation

Although post-earthquake observations identified spatial variation of ground motion (i.e., multiple-support excitation) as a frequent cause of the unfavorable response of long-span bridges, this phenomenon is often not taken into account in seismic design to simplify the calculation procedure. This study investigates the influence of multiple-support excitation accounting for coherency loss and wave-passage effects on the seismic response of reinforced concrete deck arch bridges of long spans founded on rock sites. Parametric numerical study was conducted using the time-history method, the response spectrum method, and a simplified procedure according to the European seismic standards. Results showed that multiple-support excitation had a detrimental influence on response of almost all analyzed bridges regardless of considered arch span. Both considered spatial variation effects, acting separately or simultaneously, proved to be very important, with their relative significance depending on the response values and arch locations analyzed and seismic records used. Therefore, it is suggested that all spatially variable ground-motion effects are taken into account in seismic analysis of similar bridges.

Hanger replacement influence on seismic response of suspension bridges: Implementation to the Bosphorus Bridge subjected to multi‐support excitation

2020 ◽  
Vol 49 (14) ◽  
pp. 1496-1518
Author(s):  
Selcuk Bas ◽  
Chuan‐Zhi Dong ◽  
Nurdan M. Apaydin ◽  
Alper Ilki ◽  
F. Necati Catbas
Keyword(s):  
Seismic Response ◽  
Suspension Bridges ◽  
Support Excitation

Seismic Performance Analysis of Tower Lines System under Multiple Support Excitation

2013 ◽  
Vol 732-733 ◽  
pp. 1085-1089
Author(s):  
Jian Mei Sun ◽  
Jun Qiang Li ◽  
Fu Gang Yang
Keyword(s):  
Seismic Response ◽  
Seismic Performance ◽  
Time History ◽  
Time History Analysis ◽  
Transmission Tower ◽  
Long Span ◽  
History Analysis ◽  
Tower Structure ◽  
Multiple Support ◽  
Support Excitation

In order to determine the calculational model of long span transmission tower structure under the multiple support excitation, tower-lines system are adopted. Seismic Performance of long span transmission tower lines system under Multiple Support Excitation were studied by time history analysis method. The seismic response difference of two kinds of excitation is analyzed from Dynamic Characteristics and the number of dangerous bar. It will offer the theory data for the seismic design of the kind of structure. Through analysis, the seismic response difference of the two kinds excitation is correlative to the apparent velocity; Therefore long span transmission tower structure should be considered the effect of multiple support excitation, otherwise the conclusion will be inclined to conservative or risk. Key words: tower lines system; seismic response; time history analysis,multiple support excitation

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.

The Seismic Response Analysis of the Jacket under Multiple Support Excitation

2013 ◽  
Vol 295-298 ◽  
pp. 2021-2025
Author(s):  
Jian Mei Sun ◽  
Hao Cui
Keyword(s):  
Seismic Response ◽  
Seismic Waves ◽  
Reaction Force ◽  
Space Structures ◽  
Response Analysis ◽  
Long Span ◽  
Force Reaction ◽  
Wave Travel ◽  
Multiple Support ◽  
Support Excitation

The effect of incoherency of seismic waves and wave travel on the displacement and force response of jacket structure are investigated from the maximum force, reaction force, the displacement, and so on. The conclusions illustrate it is necessary to consider the effect of multiple support excitation. The research of the differences of seismic response under multiple support excitation from uniform excitation presents the theoretical foundation on aseismatic projects for long span space structures such as jacket.

Seismic response of submerged floating tunnel under support excitation

2016 ◽  
Vol 12 (3) ◽  
pp. 404-411 ◽  
Author(s):  
J. Mirzapour ◽  
M. Shahmardani ◽  
S. Tariverdilo
Keyword(s):  
Seismic Response ◽  
Submerged Floating Tunnel ◽  
Support Excitation
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