摘要
采用ETABS软件,分别建立了不设置楼梯,设置2梯柱和4梯柱楼梯,以及在2梯柱和4梯柱楼梯梯板下端设置天然橡胶隔震支座的5种不同形式钢筋混凝土框架结构的有限元分析模型,并通过模态分析和反应谱分析研究了不同楼梯形式对钢筋混凝土框架结构整体抗震性能的影响。结果表明:设置楼梯显著改变了钢筋混凝土框架结构的振动特性,减小了其最大楼层位移,增大了其楼层剪力;增设梯柱和在梯板下端设置天然橡胶隔震支座后,整体结构的抗侧向变形能力显著提高了,楼层剪力也显著减小了,抗震性能得到明显改善。
To study the effects of different stair forms on the seismic performance of reinforced concrete frame structures,five models were established using ETABS software,including a frame structure without stairs,a frame structure with stairs having 2 landing columns,a frame structure with stairs having 4 landing columns,a frame structure with 2 landing columns and natural rubber isolation bearings installed at the lower end of the stair plates and a frame structure with 4 landing columns and natural rubber isolation bearings installed at the lower end of the stair plates.Through modal analysis and response spectrum analysis,the results show that the presence of stairs can significantly change the vibration characteristics of the structure,reduce the maximum floor displacement of the structure,and increase the floor shear force of the structure.By adding landing columns and installing natural rubber isolation bearings at the lower end of the landing plates,the deformation capacity of the overall frame structure is significantly improved.Moreover,the floor shear force of the overall frame structure is also significantly reduced,and the seismic performance of the overall structure is significantly enhanced.
作者
邱新生
晏方
彭军
赵传萍
李易林
QIU Xinsheng;YAN Fang;PENG Jun;ZHAO Chuanping;LI Yilin(School of Civil Engineering,Xinyang University,Xinyang,Henan 464000,China;Key Laboratory of Prefabricated Building of Xinyang,Xinyang,Henan 464000,China;Shanghai Zhongjian Dongfu Investment Development Co.,Ltd,Shanghai 200120,China)
出处
《湖南城市学院学报(自然科学版)》
2025年第2期21-25,共5页
Journal of Hunan City University:Natural Science
基金
信阳学院校级科研项目(2021-XJLYB-012)。
关键词
钢筋混凝土框架结构
楼梯形式
抗震性能
天然橡胶隔震支座
梯柱
reinforced concrete frame structure
stair forms
seismic performance
natural rubber isolation bearing
landing columns
