Comparative research on the main tower structure of a low gravity center cable-stayed bridge

被引：0
|
作者：
Wang Z. [1 ]
Zhang W. [1 ]
Chen S. [1 ,2 ]
Fang R. [1 ]
机构：
[1] College of Architecture and Civil Engineering, Beijing University of Technology, Beijing
[2] Hebei Engineering Research Center for Traffic Emergency and Guarantee, Shijiazhuang TieDao University, Shijiazhuang
来源：
Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University | 2020年 / 41卷 / 03期
关键词：
Bridge model; Damage pattern; Dynamic characteristic; Herringbone type main tower; Low gravity center cable-stayed bridge; One-figure type main tower; Seismic response; Shaking table test;
D O I：
10.11990/jheu.201811056
中图分类号：
学科分类号：
摘要：
In order to study the impact of different tower structures on the longitudinal seismic performance of low gravity center cable-stayed bridge, three 1/75 scale models were designed based on a cable-stayed bridge with twin concrete towers. Model 1 and Model 2 are both fixed-hinge systems but the main tower structure is different; Model 1 and Model 3 have the same main tower structure but adopt different longitudinal restraint systems. A shaking table test was conducted with three measured seismic waves and one site specific artificial wave, and the seismic response characteristics and failure mode of the different structures of the main tower with low gravity center cable-stayed bridge were studied. The input peak ground acceleration of 0.7g, 0.8g, and 1.4g correspond to bottom cracks of one-figure type main tower of Model 1, obvious cracks in the down crossbeam of herringbone type main tower of Model 2, and serious damage of main towers of Models 1 and 2, respectively. The lower tower columns and down crossbeam of the main tower of Model 1 were seriously damaged, but damage occurred only at down crossbeam of main tower for Model 2. The above test shows that compared with the one-figure type main tower, the seismic performance and post-disaster reparability of the herringbone type main tower is better; different forms of main towers are both seriously damaged at the down crossbeam which should be considered in engineering design. © 2020, Editorial Department of Journal of HEU. All right reserved.
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页码：370 / 376
页数：6
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