摘要
现浇梁式楼梯在框架结构中普遍使用,但在结构设计中往往被忽略,仅作为竖向荷载作用于结构上。为探究梁式楼梯及其支座形式对结构抗震性能的影响,利用数值模拟技术,对无楼梯框架及带不同支座楼梯框架在地震作用下应力、位移、耗能特性以及混凝土损伤等特性进行分析。分析结果表明:地震作用下,无楼梯框架、固定连接框架和滑动连接框架的柱顶位移分别为15.70、4.37、5.89 mm,表明楼梯结构的存在将增大框架结构整体刚度,改善结构应力分布;滑动支座连接与固定支座连接相比,地震作用下楼梯间结构中钢筋与混凝土的应力峰值分别减小了15%和22%,同时滞回环面积更大,因此滑动支座连接楼梯将更好地改善整体结构耗能及抗震性能。
Cast-in-place beam staircases were commonly used in frame structures,but they were generally ignored in structural design and were only added to the structure as a form of vertical load.In order to analyze the influence of the beam staircase and its support form on the seismic response of the structure,the numerical simulation technology was used to establish a multi-condition model under the action of earthquake,such as stress,displacement,energy dissipation characteristics,concrete damage and other seismic responses.The analysis results showed that the column top displacement of stairless frame,fixed connection frame and sliding connection frame was 15.70,4.37,5.89 mm under the influence of earthquakes,respectively,indicating that the existence of staircase structure would increase the overall stiffness of the frame structure and improve the structural stress distribution.Compared with the fixed support connection,the stress peaks of steel reinforcement and concrete in the staircase structureunder the action of earthquake were reduced by 15%and 22%,respectively,and the hysteresis looparea was larger,so the sliding support connection staircases could better improved the overall structural energy consumption and seismic performance.
作者
文明
冯辉
王伟伟
陈宝魁
傅华耀
WEN Ming;FENG Hui;WANG Weiwei;CHEN Baokui;FU Huayao(School of Infrastructure Engineering,Nanchang University,Nanchang 330031,China;Jiangxi Provincial Engineering Laboratory of Near Zero Energy Building,Nanchang 330031,China)
出处
《南昌大学学报（工科版）》
CAS
2023年第2期162-169,共8页
Journal of Nanchang University(Engineering & Technology)
关键词
梁式楼梯
框架结构
数值模拟
滑动连接
抗震性能
beam staircase
frame structure
numerical simulation
sliding connection
seismic performance
