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[1]顾镇媛,刘伟庆,王曙光,等.多点输入下大跨网架结构地震响应分析[J].南京工业大学学报(自然科学版),2017,39(01):75-84.[doi:10.3969/j.issn.1671-7627.2017.01.013]
 GU Zhenyuan,LIU Weiqing,WANG Shuguang,et al.Seismic response analysis of long-span truss structures under multi-support excitations[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2017,39(01):75-84.[doi:10.3969/j.issn.1671-7627.2017.01.013]
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多点输入下大跨网架结构地震响应分析()
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《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
39
期数:
2017年01期
页码:
75-84
栏目:
出版日期:
2017-01-21

文章信息/Info

Title:
Seismic response analysis of long-span truss structures under multi-support excitations
文章编号:
1671-7627(2017)01-0075-10
作者:
顾镇媛刘伟庆王曙光杜东升
南京工业大学 土木工程学院,江苏 南京 211800
Author(s):
GU ZhenyuanLIU WeiqingWANG ShuguangDU Dongsheng
College of Civil Engineering,Nanjing Tech University,Nanjing 211800,China
关键词:
大跨网架 隔震结构 多点输入 一致输入 时程分析
Keywords:
long-span truss isolated structure multi-support excitation uniform excitation time history analysis
分类号:
TU375.4
DOI:
10.3969/j.issn.1671-7627.2017.01.013
文献标志码:
A
摘要:
基于绝对位移法建立了多点输入分析模型,采用三角级数法人工合成多点非平稳地震动。选取90 m跨度的正方形及长方形多点支承网架为研究对象,分别对两大跨结构进行一致和多点地震动输入下的动力反应分析。采用基础隔震,通过时程分析研究隔震前后两结构的响应规律差异。结果表明:在水平地震作用下,未隔震模型在一致输入下上部网架各杆件最大轴力相差不大,而在多点输入下相差较大; 正方形结构上部网架节点最大加速度响应在多点输入下增大,而长方形结构却相反; 隔震后结构响应有了大幅度的减小,多点输入与一致输入轴力响应规律几乎一致。在竖向地震作用下未隔震正方形结构在多点输入下的杆件轴力与支承柱柱底弯矩,与一致输入相比均有所增大,其中长方形结构增幅更大; 隔震后结构在一致输入下轴力响应反而增大,可见竖向地震作用时应多加考虑地震动空间效应。
Abstract:
The analysis model under multi-support excitation was established based on the absolute displacement method.The multi-support non-stationary ground motions were artificially synthesized by trigonometric series method.A square and a rectangular multi-support truss models with span of 90 m were selected,and the dynamic response of the two structures under uniform excitation and multi-support excitation were respectively analyzed.Base isolations were adopted at the bottom of the two models,and the differences of structures’ response before and after isolation were investigated through time history analysis.Results showed that the axial forces of control bars vary little under uniform excitation while they change largely under multi-support excitation,under the horizontal earthquake action.The maximum accelerations of truss nodes of the square structure increase under multi-support excitation,but the rectangular structure was opposite.It means the internal forces results were unreliable if uniform excitation was directly used in long-span strictures.The responses of the isolated structures were greatly reduced compared with non-isolated ones,and the regularities were almost consistent under multi-support excitation or uniform excitation.Under the vertical earthquake action,axial forces and the moments of the non-isolated square structure increased a little under multi-support excitation compared to uniform excitation,but the rectangular structure increased more.The axial forces of isolated structures raise instead under uniform excitation.Therefore,the spatial effect of seismic action should be more considered when structures used the vertical seismic action.

参考文献/References:

[1] 潘旦光,楼梦麟,范立础.多点输入下大跨度结构地震反应分析研究现状[J].同济大学学报(自然科学版),2001,29(10):1213.
[2] 屈铁军,王前信.空间相关的多点地震动合成(Ⅰ):基本公式[J].地震工程与工程振动,1998,18(1):8.
[3] 屈铁军,王前信.空间相关的多点地震动合成公式(Ⅱ):合成实例[J].地震工程与工程振动,1998,18(2):25.
[4] HAO H,OLIVEIRA C S,PENZIEN J.Multiple-station ground motion processing and simulation based on SMART-1 array data[J].Nuclear engineering and design,1989,111(3):293.
[5] 国巍,余志武,柳国环,等.大跨隔震结构多点地震计算模型的几点注记[J].哈尔滨工业大学学报,2013,45(10):86.
[6] 李旭淳.大跨度双拱支承钢结构的多维多点地震响应分析[D].广州:华南理工大学,2014.
[7] 刘成林.大跨空间结构多维多点地震反应分析[D].成都:西南交通大学,2013.
[8] 刘先明.大跨度空间网格结构多点输入反应谱理论的研究与应用[D].南京:东南大学,2003.
[9] 赵均,徐小燕,朱丹,等.大跨度飞机库考虑多维地震输入的动力分析[J].北京工业大学学报,2010,36(7):896.
[10] 任德斌,赵文婷.大跨钢拱薄壳穹顶结构地震相应分析[J].工程力学,2014,31(增刊):166.
[11] 黄湛.超长网架结构多维多点地震响应分析[D].北京:北京工业大学,2010.
[12] 徐庆阳,李爱群,张志强,等.某大跨网架结构屋盖隔震整体分析[J].工程抗震与加固改造,2007,29(6):20.
[13] 柯世堂.多点输入下大跨空间结构地震反应分析方法研究[D].哈尔滨:中国地震局工程力学研究所,2007.
[14] AMIN M,ANG A H S.Nonstationary stochastic model of earthquake motion[J].Journal of the engineering mechanics division,1968,94:559.

备注/Memo

备注/Memo:
收稿日期:2015-11-03
基金项目:国家自然科学基金(51178219)
作者简介:顾镇媛(1990—),女,江苏阜宁人,博士,主要研究方向为大跨度结构抗震; 刘伟庆(联系人),教授,E-mail:wqliu@njtech.edu.cn.
引用本文:顾镇媛,刘伟庆,王曙光,等.多点输入下大跨网架结构地震响应分析[J].南京工业大学学报(自然科学版),2017,39(1):75-84..
更新日期/Last Update: 2017-01-15