[1]周雨洁,宋旭明,邹卓,等.混合体系多塔矮塔斜拉桥推倒分析的适用性研究[J].地震工程与工程振动,2022,42(02):181-192.[doi:10.13197/j.eeed.2022.0218]
　ZHOU Yujie,SONG Xuming,ZOU Zhuo,et al.Applicability research on pushover analysis of multi-pylon extradosed cable-stayed bridges with hybrid system[J].EARTHQUAKE ENGINEERING AND ENGINEERING DYNAMICS,2022,42(02):181-192.[doi:10.13197/j.eeed.2022.0218]
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混合体系多塔矮塔斜拉桥推倒分析的适用性研究
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《地震工程与工程振动》[ISSN:/CN:]

卷:
42
期数:
2022年02期
页码:
181-192
栏目:
论文
出版日期:
2022-04-30

文章信息/Info

Title:
Applicability research on pushover analysis of multi-pylon extradosed cable-stayed bridges with hybrid system
作者:
周雨洁1;  宋旭明1;  邹卓2;  唐冕1
1. 中南大学 土木工程学院, 湖南 长沙 410075;
2. 杭州市交通规划设计研究院有限公司, 浙江 杭州 310000
Author(s):
ZHOU Yujie1;  SONG Xuming1;  ZOU Zhuo2;  TANG Mian1
1. College of Civil Engineering, Central South University, Changsha 410075, China;
2. Hangzhou Transportation Planning and Design Institute Co., Ltd., Hangzhou 310000, China
关键词:
矮塔斜拉桥; 抗震分析; 多模态推倒分析; 能力谱法; 适用性
Keywords:
low pylon cable-stayed bridge; seismic analysis; multimodal pushover analysis; ability spectrum method; applicability
分类号:
TU022
DOI:
10.13197/j.eeed.2022.0218
摘要:
为了研究推倒分析求解混合体系矮塔斜拉桥地震响应的适用性，以某混合体系多塔矮塔斜拉桥为工程背景，采用SAP2000建立空间有限元模型，分别对桥梁结构进行弹性和弹塑性推倒分析，探究在多塔矮塔斜拉桥地震分析中传统推倒和模态推倒的优劣及结构在塑性状态下不同计算方法的精确程度。结果表明：在弹性状态下，混合体系矮塔斜拉桥顺桥向和横桥向的地震响应不仅仅由一阶振型控制，高阶振型的影响依旧显著，这导致传统荷载模式求解结果偏差过大，而考虑高阶振型的MPA法在弹性及弹塑性阶段的适用性均较好，且Chopra法与ATC－40法在塑性地震响应求解方面具有良好的统一性。在塑性状态下，ATC－40法和Chopra法得出的纵横向基底剪力与非线性时程偏差较大，建议当采用ATC－40和Chopra法计算混合体系多塔斜拉桥地震下内力响应时需要综合考虑其他模态控制点的影响。
Abstract:
In order to study the applicability of push-down analysis to solve the seismic response of a mixed-system low-pylon cable-stayed bridge,a mixed-system multi-pylon cable-stayed bridge was taken as the engineering background. SAP2000 was used to establish a spatial finite element model,and the elastic and elastic-plastic push-down analysis of the bridge structure was carried out respectively. The advantages and disadvantages of traditional pushdown and modal push-down in seismic analysis of multi-pylon cable-stayed bridge and the accuracy of different calculation methods in plastic state are discussed. Results show that in the elastic state,the longitudinal and transverse seismic responses of the mixed system low pylon cable-stayed bridge are not only controlled by the first-order vibration modes,but also significantly affected by the higher-order vibration modes,which leads to a large deviation in the solution results of the traditional load modes.However,the applicability of MPA method considering high order modes in elastic and elastic-plastic phases is better,and Chopra method and ATC-40 method have good uniformity in solving plastic seismic response; In the plastic state,the longitudinal and transverse base shear obtained by ATC-40 method and Chopra method deviates greatly from the nonlinear time history. Therefore,it is suggested that the influence of other modal control points should be considered comprehensively when the ATC-40 and Chopra methods are used to calculate the internal force response of the mixed system cable-stayed bridge under earthquake.

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备注/Memo

备注/Memo:
收稿日期:2021-5-21;改回日期:2021-7-18。
基金项目:国家自然科学基金项目（52078486）
作者简介:周雨洁(1998-),男,硕士研究生,主要从事桥梁结构响应研究.E-mail:204812363@csu.edu.cn
通讯作者:宋旭明(1974-),男,副教授,博士,主要从事高速铁路桥梁安全评估研究.E-mail:ctysxm@163.com
更新日期/Last Update: 1900-01-01