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author:

Zong, Zhouhong (Zong, Zhouhong.) [1] | Xia, Zhanghua (Xia, Zhanghua.) [2] (Scholars:夏樟华) | Liu, Haihong (Liu, Haihong.) [3] | Li, Yale (Li, Yale.) [4] | Huang, Xueyang (Huang, Xueyang.) [5]

Indexed by:

EI Scopus SCIE

Abstract:

In recent years, increasing attention has been paid to the collapse failures of long-span continuous rigid-frame bridges under strong earthquake excitations. This paper presents the results of a study in which a 1:15 scaled two-span prestressed concrete continuous rigid-frame bridge model with box-type piers was tested using the shake-table array test system to investigate the seismic response characteristics. Two nonlinear finite-element (FE) models were constructed. The first was a single-girder model that was used to simulate the seismic response under weak seismic waves. The second was an explicit dynamic FE model that was used to simulate the collapse and failure mechanisms of the scaled bridge under strong earthquakes. Testing revealed that the response of the central pier of the prestressed concrete continuous rigid-frame bridge was the largest under seismic excitation, and the damage first appeared at the lower end of the central pier in all cases. The numerical simulations revealed that traveling wave effects have a beneficial effect on the displacement at the top of all piers. The explicit dynamic model was able to predict the failure modes and collapse process of the scaled bridge model. The plastic hinges emerging at the ends of the piers were considered the main failure modes, and the collapse process changed with different seismic wave excitations. Such tests and analyses can provide useful reference for the seismic-strengthening and anticollapse design of prestressed concrete continuous rigid-frame bridges with a long span.

Keyword:

Collapse failure modes Explicit dynamic FE model Prestressed concrete continuous rigid-frame bridge Shaking-table array testing Strong earthquake excitations Traveling wave effects

Community:

  • [ 1 ] [Zong, Zhouhong]Southeast Univ, Sch Civil Engn, 2 Sipailou Rd, Nanjing 210096, Jiangsu, Peoples R China
  • [ 2 ] [Li, Yale]Southeast Univ, Sch Civil Engn, 2 Sipailou Rd, Nanjing 210096, Jiangsu, Peoples R China
  • [ 3 ] [Xia, Zhanghua]Fuzhou Univ, Sch Civil Engn, 2 Xueyuan Rd, Fuzhou 350108, Peoples R China
  • [ 4 ] [Liu, Haihong]Henan Prov Commun Planning & Design Inst Co Ltd, 70 Midlonghair Rd, Zhengzhou 450052, Peoples R China
  • [ 5 ] [Huang, Xueyang]Fujian Acad Bldg Res, 52 Jintang Rd, Fuzhou 350014, Peoples R China

Reprint 's Address:

  • [Zong, Zhouhong]Southeast Univ, Sch Civil Engn, 2 Sipailou Rd, Nanjing 210096, Jiangsu, Peoples R China

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Source :

JOURNAL OF BRIDGE ENGINEERING

ISSN: 1084-0702

Year: 2016

Issue: 9

Volume: 21

1 . 4 7 6

JCR@2016

3 . 1 0 0

JCR@2023

ESI Discipline: ENGINEERING;

ESI HC Threshold:177

JCR Journal Grade:2

CAS Journal Grade:4

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 0

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