[1]张翠红,吕令毅.大跨度斜拉桥在多点随机地震激励作用下的响应分析[J].东南大学学报(自然科学版),2004,34(2):249-252.[doi:10.3969/j.issn.1001-0505.2004.02.025]
 Zhang Cuihong,Lu Lingyi.Seismic response analysis of long-span cable-stayed bridge under multi-support random excitations[J].Journal of Southeast University (Natural Science Edition),2004,34(2):249-252.[doi:10.3969/j.issn.1001-0505.2004.02.025]
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大跨度斜拉桥在多点随机地震激励作用下的响应分析()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
34
期数:
2004年第2期
页码:
249-252
栏目:
交通运输工程
出版日期:
2004-03-20

文章信息/Info

Title:
Seismic response analysis of long-span cable-stayed bridge under multi-support random excitations
作者:
张翠红 吕令毅
东南大学混凝土与预应力混凝土结构教育部重点实验室, 南京 210096
Author(s):
Zhang Cuihong Lu Lingyi
Key Laboratory of RC & PC Structures of Ministry of Education, Southeast University, Nanjing 210096, China
关键词:
斜拉桥 地震激励 空间变化 随机响应
Keywords:
cable-stayed bridge seismic excitations spatial variations stochastic response
分类号:
U448.27
DOI:
10.3969/j.issn.1001-0505.2004.02.025
摘要:
以南京第二长江大桥南汊桥为例,采用随机振动分析方法研究了地震动的空间变化特性,包括行波效应、部分相干效应以及局部场地效应对大跨度斜拉桥地震响应的影响.研究结果表明:与一致地震激励相比,地震动的空间变化特性可以使斜拉桥的地震响应改变30%; 同时考虑行波效应、部分相干效应时的地震响应接近于仅考虑行波效应时的地震响应; 行波效应对斜拉桥地震响应的影响明显大于部分相干效应的影响; 在加速度均方根相同的随机地震作用下,斜拉桥在软场地条件下的地震响应明显大于在硬场地条件下的响应,中等场地条件下的地震响应介于两者之间.
Abstract:
Seismic response analysis of a long-span cable-stayed bridge under random seismic excitations with spatial variations,including travelling effect, incoherence effect and local site effect, was made with stochastic method.Based on this study the following conclusions are drawn:The responses of cable-stayed bridge under seismic excitations with spatial variations differ from those under uniform seismic excitations up to 30%; The responses obtained by considering travelling effect as well as incoherence effect are close to those obtained by only considering travelling effect; Travelling effect has more significant effect on the seismic responses of cable-stayed bridge than incoherence effect; If r.m.s.(root-mean-square)of random seismic ground motions are equal,seismic responses are considerably greater for the case of soft soil than for the cases of firm soil or medium soil.

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备注/Memo

备注/Memo:
基金项目: 国家自然科学基金资助项目(59708008)、教育部优秀青年教师基金资助项目.
作者简介: 张翠红(1979—),女,硕士生; 吕令毅(联系人),男,博士,教授,llu@public1.ptt.js.cn.
更新日期/Last Update: 2004-03-20