摘要
以云南某实际筒壳网架为研究对象,首先运用SAP2000软件对其默认的塑性铰进行了修改,确定了适用于判定网架结构关键杆件的方法,然后对关键杆件进行了加固,运用增量动力分析方法对网架进行了在简谐荷载作用下的时程分析,根据网架结构最大节点位移以及出现塑性杆件的数量来综合判定网架的抗倒塌性能,最后通过对比分析加固前后网架的抗倒塌能力验证了加固方法的可行性,并给出了判定网架倒塌的具体标准。实现了通过加固较少杆件来大幅提升网架抗倒塌性能的设想,具有良好的工程应用价值,可为类似工程提供参考。
An actual tubular frame of Yunnan is taken as the research object in this paper.Firstly,the default plastic hinge is modified by SAP2000 software,and the method for judging the key rods of the grid structure is determined.Secondly,the key members are reinforced,and the incremental dynamic analysis method is used to analyze the time history of the grid structure under the simple harmonic load.According to the maximum node displacement of the grid structure and the number of plastic rods,the anti-collapse performance of the grid is comprehensively determined.Finally,the anticollapsibility of the grid structure before and after reinforcement is analyzed and compared,the feasibility of the reinforcement method is verified,and the specific criteria for determining the collapse of the grid structure are given.It realizes the great improvement of the anti-collapse performance of the grid structure by strengthening fewer bars,and has good engineering application value,and can provide reference for similar projects.
作者
梁姗妮
王孟鸿
赵要祥
LIANG Shanni;WANG Menghong;ZHAO Yaoxiang(School of Civil and Transportation Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;China Southwest Architectural Design and Research Institute Corp,Chengdu 610000,China)
出处
《建筑结构》
CSCD
北大核心
2020年第S01期880-886,共7页
Building Structure
基金
国家自然科学基金项目(51578038)
关键词
网架结构
关键杆件
简谐荷载
连续倒塌
grid structure
key rods
simple harmonic load
continuous collapse
作者简介
梁姗妮,硕士,Email:liang51689@163.com。
