单层柱面网壳结构常遇三维地震作用下的地震响应分析  

Analysis on Seismic Response of Single-layer Latticed Cylindrical Shells Due to Multi-encountered 3-dimension Earthquakes

作　　者：邢佶慧[1] 钱宏亮[2] 范峰[2] 沈世钊[2] 

机构地区：[1]北京交通大学土建学院,100044 [2]哈尔滨工业大学土木学院,150090

出　　处：《建筑结构》2007年第2期31-33,共3页Building Structure

基　　金：国家自然科学基金资助项目(50608002);北京交通大学"十五"专项科技基金项目(2004SM030)

摘　　要：地震内力系数法是一种适用于空间网格结构的简洁有效的抗震设计方法,但应用于单层网壳结构时需要改进。根据单层网壳结构的受力特点,考虑弯矩影响,修正了传统地震内力系数的定义,并选取大量单层柱面网壳算例进行了常遇三维地震作用下的时程分析,观察其杆件地震内力系数取值随矢宽比、长宽比、杆件截面等参数的变化规律,发现在文中研究范围内,单层柱面网壳结构地震内力系数取值随长宽比增大有逐渐增大的趋势,随矢宽比的增大有逐渐减小的趋势。在大量统计分析的基础上,归纳出可供实际工程设计参考的地震内力系数建议取值。Seismic force coefficient method should be improved when it is used for sing-layer space frames. According to the characteristic of single-layer space frames, the traditional definition of seismic force coefficient employing the effect of bending moment on the stress of members is modified. Large scale time-history analysis is performed for a lot of single-layer latticed cylindrical shells due to multi-encountered 3-dimension earthquakes. The seismic force coefficients of such structures increase with the increasing of length-span ratios and the decreasing of rise-span ratios in general in the research range. Based on the analysis result, practical seismic force coefficients for single-layer latticed cylindrical shells are proposed.

关 键 词：单层柱面网壳结构 地震内力系数 矢宽比 长宽比 杆件截面 

分 类 号：TU356[建筑科学—结构工程]