[1]关彬林,连鸣,苏明周.钢框筒Pushover分析侧向力分布方式的影响比较[J].地震工程与工程振动,2019,39(01):146-157.[doi:10.13197/j.eeev.2019.01.146.guanbl.017]
 GUAN Binlin,LIAN Ming,SU Mingzhou.Comparison of influence of lateral load patterns on Pushover analysis of steel framed-tube structure[J].EARTHQUAKE ENGINEERING AND ENGINEERING DYNAMICS,2019,39(01):146-157.[doi:10.13197/j.eeev.2019.01.146.guanbl.017]
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钢框筒Pushover分析侧向力分布方式的影响比较
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《地震工程与工程振动》[ISSN:/CN:]

卷:
39
期数:
2019年01
页码:
146-157
栏目:
论文
出版日期:
2019-02-28

文章信息/Info

Title:
Comparison of influence of lateral load patterns on Pushover analysis of steel framed-tube structure
作者:
关彬林 连鸣 苏明周
西安建筑科技大学 土木工程学院, 陕西 西安 710055
Author(s):
GUAN Binlin LIAN Ming SU Mingzhou
School of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China
关键词:
钢框筒Pushover分析侧向力分布方式弹塑性时程分析剪力滞后
Keywords:
steel framed-tubePushover analysislateral load patternelasto-plastic time history analysisshear lag
分类号:
TU973.17;TU393.2
DOI:
10.13197/j.eeev.2019.01.146.guanbl.017
摘要:
钢框筒结构是空间受力结构,Pushover分析时侧向力直接施加在腹板框架上是否合适和对钢框筒设计安全性的影响需要评估。利用SAP2000软件对2个30层钢框筒结构进行了双向地震弹塑性时程分析和四种侧向力分布方式的Pushover分析,并比较了它们的层间位移角、基底剪力、塑性铰分布,以及分析了高度等效分布中高度影响因子k的影响。研究表明:倒三角分布、多振型组合分布(SRSS分布)和高度等效分布与时程分析的结果存在一定的偏差,不足以考虑大震下剪力滞后效应对结构偏下楼层的柱的影响;均匀分布在大震下的塑性铰分布可在一定程度上预测偏下楼层可能的柱铰和梁铰;高度等效分布在中震或大震下过高估计了高阶振型的影响,可考虑k取1.4来减小这种影响。Pushover方法在钢框筒的初步设计中具有一定的价值,宜优先考虑SRSS分布和均匀分布方式,且应重点关注大震下的塑性铰分布,仍建议在Pushover分析基础上用弹塑性时程分析进行双向或三向大震下的校核。
Abstract:
Steel framed-tube structure is a spatially stressed structure, and whether lateral load of Pushover analysis imposed on web frames directly is feasible and the impact of lateral load pattern on design safety of steel framed-tube structure needs to be evaluated. Elasto-plastic time history analysis of bi-directional earthquake and Pushover analysis of four lateral load patterns are conducted for two 30-storey steel framed-tube structures by SAP2000 software, and storey drift angles, base shear and plastic hinge distribution for various lateral load patterns are compared to results of time history analysis, furthermore influence of height impact factor k in height equivalent pattern is analyzed. The results show that there is a certain deviation between inverted triangle pattern, multi-mode combined pattern(SRSS pattern), and height equivalent pattern and time history analysis, it is not enough for lateral load patterns to consider influence of shear lag effect on columns of the lower storey of the structure under rare earthquake; the plastic hinge distribution of uniform distribution under rare earthquake can predict possible column hinges and beam hinges of lower storey to a certain extent; height equivalent distribution overestimates influence of high-order mode under moderate or rare earthquake, and when k takes 1.4, the influence can be reduced. Pushover method has certain value in the preliminary design of steel framed-tube structure, and SRSS pattern and uniform pattern should be considered first, and plastic hinge distribution of structure under rare earthquake should be focused on, and it is still recommended to use elasto-plastic time history analysis to check under bi-directional or three-dimensional rare earthquake on the basis of Pushover analysis.

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备注/Memo

备注/Memo:
收稿日期:2018-04-25;改回日期:2018-07-18。
基金项目:国家自然科学基金项目(51708444);陕西省高校科协青年人才托举计划项目(20170517);陕西省博士后科研项目资助(2017);陕西省自然科学基础研究计划项目(2018JQ5074);陕西省教育厅专项科研计划项目(18JK0456)
作者简介:关彬林(1989-),男,博士研究生,主要从事新型钢结构体系抗震性能研究.E-mail:guanbinlin@163.com
通讯作者:连鸣。E-mail:lian
更新日期/Last Update: 1900-01-01