板厚对板-柱结构抗震性能的影响分析  

Influence of Slab Thickness on Seismic Behavior of Slab-Column Structures

作　　者：郭楠[1] 陈慧慧[1] 杨颖伟[1] 

机构地区：[1]东北林业大学土木工程学院,黑龙江哈尔滨150040

出　　处：《沈阳建筑大学学报（自然科学版）》2015年第1期45-52,共8页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(51208083);黑龙江省自然科学基金项目(E201402)

摘　　要：目的研究板厚对板柱结构抗震性能的影响,为推广板柱结构在抗震区的应用提供依据.方法采用三维实体建模,对板厚从190-240 mm（跨厚比30-40）的板柱结构进行了有限元分析.结果得到了板柱结构的基底剪力顶点侧移关系曲线及Pushover分析结果曲线,分析了塑性铰出铰情况,并将加载过程分为4个阶段,对比了各加载阶段结构的响应,给出了对应于7度多遇及罕遇地震作用下的结构侧移和层间位移角.结论当板厚从190 mm增大到240 mm时,板柱结构的抗侧刚度随之增大,板厚每增加10 mm结构的抗侧刚度增大约5%;等代梁刚度随板厚的增加而增大,虽然板柱结构在形成出铰机制时出现梁铰数量略减而柱铰数量略增的现象,但整体仍以梁铰为主;在7度多遇、罕遇地震作用下,跨厚比在30~40且经过合理设计的板柱结构的最大层间位移角均能满足抗震规范的要求.The purpose of this paper is to study the influence of slab thickness on seismic behavior of slabcolunm structures and to provide a basis for extending applications of slabcolumn struc tures in seismic regions. Based on the method of 3D solid modeling, finite element analysis was employed for slabcolumn structures with slab thicknesses ranged from 190mm to 240mm（ span to depth ratios ranged from 30 to 40）. Curves of base shearpeak displacements of slabcolumn struc tures and Pushover analysis results were obtained and hinges appearance situation of plastic hinges was analyzed. The loading process was divided into four stages;the response of structure in each stage was compared;and the structural lateral displacements and story drift angles under the actions of frequent and rare earthquakes with 7 degrees were given. It is found that with the increase of slab thickness from 190mm to 240mm, the lateral stiffness of slabcolumn structure is increased about 5% per incrcase 10 mm of slab thickness ;the stiffness of equivalent beam is also increased. When the hinge appearance mechanism is formed, the number of beam hinges are decreased and the column hinges are increased slightly;while the slabcolumn structure still dominated by beam hinge mechanism. Under frequent and rare earthquakes with 7 degrees, the all maximum story drift angles of reasonably designed slabcolumn structures with span to depth ratios ranged from 30 to 40 can meet requirements of the seismic code.

关 键 词：板-柱结构 抗震性能 PUSHOVER分析 结构侧移 层间位移角 

分 类 号：TU398.1[建筑科学—结构工程]