楼梯对框架结构性能影响分析  

Analysis of Influence of Stairs on Frame Structural Properties

作　　者：张翠强[1] 周颖[1] 

机构地区：[1]同济大学土木工程学院,上海200092

出　　处：《结构工程师》2010年第4期36-41,共6页Structural Engineers

摘　　要：为了分析楼梯对结构的影响,用SAP2000通过对比有无楼梯参与整体结构计算分析,得到了楼梯对整体结构动力特性和梯板及其周边构件的影响。计算分析表明,对于框架结构的计算分析要考虑楼梯对整体的影响。通过振型刚度解耦,可以得到楼梯对整体结构各阶振型刚度的贡献。楼梯的存在改变了的结构振型出现的次序,进而改变了结构薄弱方向。楼梯板在地震作用下,处于拉弯或压弯状态,设计中要按拉弯或压弯进行配筋。楼梯对楼梯间角柱受力影响非常显著,导致楼梯间柱的轴力增大为不考虑楼梯整体分析时的5倍左右。The paper obtained the influence caused by stairs on the whole structural dynamic property and stair plate as well as periphery elements by comparing the computational analysis results between the structure with stair and the structure without stair. It is necessary to consider the stair when analyzing the frame structure in the light of the analysis discussed in this paper. By decoupling the stiffness of the structure, the stairs stiffness distribution proportion at every mode was obtained. The stairs may change the order of the modes of the structure and the weakness direction of the structure. Stair plate should be designed by the state of tensionmoment or compression-moment to resist the action of earthquake. The corner columns of the structure are significantly affected by the stairs and axial force of the corner column may be amplified four times than the original axial force without stairs.

关 键 词：楼梯 SAP2000 结构分析 振型刚度 

分 类 号：TU375.4[建筑科学—结构工程]