外置楼梯间一字形剪力墙稳定性分析与研究  

Analysis and Research on Stability of a Zigzag Shear Wall in External Stairwell

作　　者：王起龙 WANG Qi-long(Ji'an Institute of Architectural Design and Planning,Ji'an 343099)

机构地区：[1]吉安市建筑设计规划研究院,吉安343099

出　　处：《广州建筑》2024年第1期1-4,共4页GUANGZHOU ARCHITECTURE

摘　　要：为正确解决实际项目中外置楼梯间一字形剪力墙墙肢稳定性常用结构设计软件模拟失真的问题,本文选取了四个不同烈度、风压、高宽比且有代表性的实际项目,分析取消外置楼梯间一字形剪力墙的可行性,采用了改变一字形剪力墙厚度、改善连梁的损伤程度、一字形剪力墙外侧设置飘板三种不同方法。采用设计荷载值法加载分析,用有限元软件Midas Gen,按模型实际受力状态进行线性屈曲分析。结果表明,对于烈度较低、风压较小的区域,高宽比不大时,可以取消楼梯间一字形剪力墙;增加一字形剪力墙墙肢厚度,能提高其稳定性;连梁损伤程度越小,一字形剪力墙墙肢的稳定性越好;在一字形剪力墙外侧设置飘板,能大幅度提高其稳定性。In order to correctly solve the stability of a zigzag shear wall in an external stairwell in a practical project,the common structural design software simulates the distortion.Four representative practical projects with different intensity,wind pressure and aspect ratio were selected to analyze the feasibility of canceling the one-shaped shear wall in the stairwell.Three different methods were adopted:changing the thickness of the one-shaped shear wall,improving the damage degree of the connecting beams,and setting the floating plate on the outside of the one-shaped shear wall.The design load value method was used for loading analysis,and the finite element software Midas Gen was used for linear buckling analysis according to the actual stress state of the model.The results show that for the area with low intensity and low wind pressure,when the ratio of height to width is not large,the zigzag shear wall can be eliminated.The stability of the shear wall can be improved by increasing the thickness of the leg.The smaller the damage degree of the beam,the better the stability of the leg of the shear wall.The stability of a zigzag shear wall can be greatly improved by installing a floating plate on the outside.

关 键 词：一字形剪力墙 墙肢稳定性 屈曲分析 有限元分析 外置楼梯 

分 类 号：TU375[建筑科学—结构工程]