摘要
为确定某多塔超限连体结构高位钢连廊的连接方案,建立了4种不同连廊连接形式的模型,开展计算模型的抗震对比分析。模型A连廊为两端刚接,模型B连廊在T2塔楼滑动、T3塔楼刚接,模型C连廊在T3塔楼滑动、T2塔楼刚接,模型D连廊为两端铰接。分别对4种高位连接方案开展多遇地震作用下的弹性分析,对比4种模型的位移与内力包络值,并分析罕遇地震作用下结构的动力弹塑性响应。分析结果表明,高位钢连廊刚性连接方案可以提高整体结构的平动刚度;多遇地震作用下刚性连接方案不仅可以减小结构位移,还能降低连廊梁的弯扭矩,实现塔楼之间的刚度协调;罕遇地震作用下刚性连接方案具有最小的弹塑性层间位移角以及顶点位移,强连接方案关键梁柱节点最大位移较小,4种模型的损伤情况相近。因此,针对该多塔连体结构,高位连廊采取刚性连接方案对整体结构更有利。
To determine the connection scheme of the aerial steel corridor of a multi-tower out-of-code connected structure,four models with different connections between the corridor and towers were built and the seismic comparison analysis of the models was carried out.Model A corridor is rigidly connected at both ends,model B corridor slides at T2 tower and rigidly connected at T3 tower,model C corridor slides at T3 tower and rigidly connected at T2 tower,and model D corridor is hinged at both ends.The elastic analysis of four connection schemes under the frequent earthquakes was conducted,and the displacement and internal force envelope values of the four models were compared.The dynamic elastic-plastic response of the structure under the action of rare earthquakes was analyzed.The results show that the rigid connection scheme can improve the translational stiffness of the whole structure.The rigid connection scheme can reduce the displacement of the structure,and also can reduce the bending moment of the steel corridor beams,to realize the stiffness coordination between the towers.The rigid connection scheme has the minimum inter-story drift and top displacement under rare earthquakes.The maximum displacement of key beam-column joints in the strong connection scheme is small,and the damages of the four models are similar.Therefore,for the multi-tower connected structure,a rigid connection scheme is more beneficial to the overall structure.
作者
梁潇
周雅
牛晓昱
刘家宝
蔡建国
LIANG Xiao;ZHOU Ya;NIU Xiaoyu;LIU Jiabao;CAI Jianguo(National Prestress Engineering Research Center,Southeast University,Nanjing 211189,China;Zhuhai CRCC Building Estate Co.,Ltd.,Zhuhai 519030,China)
出处
《建筑钢结构进展》
CSCD
北大核心
2023年第8期16-25,37,共11页
Progress in Steel Building Structures
基金
中国铁建投资集团有限公司2020年度科技研发计划课题(2020-A02)。
关键词
钢连廊
连接形式
刚性连接
动力弹塑性分析
steel corridor
connection scheme
rigid connection
dynamic elastic-plastic analysis
