单道伸臂竖向位置对加强层处筒体弯矩突变的影响分析  

Analysis of effect of single outrigger position on moment reversal of core at strengthened story

作　　者：苏原[1,2] 胡国法 吴晟[1,2] 

机构地区：[1]华中科技大学土木工程与力学学院,湖北武汉430074 [2]华中科技大学控制结构湖北省重点实验室,湖北武汉430074 [3]中冶南方武汉设计咨询有限公司,湖北武汉430077

出　　处：《武汉大学学报（工学版）》2010年第5期623-626,共4页Engineering Journal of Wuhan University

摘　　要：在加强层处结构出现内力突变,是带加强层框架-筒体结构的主要结构特点之一.利用顶部带加强层框架-筒体结构中筒体弯矩计算公式和子结构分析方法,研究了在水平均布荷载和倒三角形荷载作用下,单道伸臂竖向位置和加强层处筒体弯矩突变量的关系.结果表明:在均布荷载作用下,当单道伸臂设置在结构总高度的0.65倍时,筒体弯矩突变量最大;在倒三角形荷载作用下,筒体弯矩突变量随伸臂位置的升高而减少.算例结果表明了以上结论的可信性.该结论可供在带加强层框架-筒体结构初步设计中参考使用.One of main structural features of frame-core structure with strengthened story is the internal force reversal at strengthened story. Using the core moment formula of frame-core structure with top out- rigger and substructure analysis methbd; the relationship between single outrigger position and moment re- versal of the core at strengthened story under lateral uniform load, inverted triangle distributed load are studied. The results show： under lateral uniform load, the core moment reversal is the maximum when the outriggers are located at 0.65 H; under inverted triangle distributed load, the core moment reversal will reduce with the outriggers position increased. The results of example indicate the reliability of the method. These results can be referentially used in preliminary design of fram-core structure with strengthened story.

关 键 词：水平伸臂 筒体弯矩突变 竖向位置 框架-筒体结构 

分 类 号：TU973.3[建筑科学—结构工程]