单层钢厂房纵向抗震计算理论的探讨

对《建筑抗震设计规范》GB 50011—2010单层工业钢厂房纵向抗震设计第9.2.8条(附录)与第5.2.6条对比分析,得出在混凝土无檩屋盖单层工业厂房纵向抗震计算理论中,规范对水平地震作用分配方式的规定相互矛盾。建议采用按抗侧力构件从属面积上重力荷载代表值的比例分配。同时建议规范第9.2.8条引用的9.1.8第一款改为不计及围护墙和隔墙的有效刚度。根据某重屋盖《单层工业厂房设计示例》中纵向抗震部分按照规范规定和建议的理论分别进行了补充计算和对比,发现两种理论计算所得结果相差很大,严重影响安全。

Some Discussions on Longitudinal Seismic Calculation of Single-story Steel Factory Buildings

Regarding the distribution modes of longitudinal horizontal seismic forces of single-story steel factory buildings with concrete roof without purlin,there are conflicts between Sections 9.2.8(Appendix K) and 5.2.6 in the Code for Seismic Design of Buildings GB 50011—2010.Distributing the longitudinal seismic forces according to the proportion of the gravity loads on the subordinate areas of the lateral force components is suggested.Replacing section 9.2.8 which quote form clause 1 of section 9.1.8 with "don’t consider the effective stiffness of the enclosure walls or the partition walls"is recommended.Then the single-story Factory building Design Examples is referred to during calculating the longitudinal seismic forces with two methods,and found the calculated results of two methods are greatly different,which affect the safety of factory buildings seriously.