某综合体育馆训练场预应力主梁次内力研究  

Study and analysis of secondary internal force of pre-stressed main beam in the training place of a comprehensive gymnasium

作　　者：熊学玉[1,2] 吕品[1] 顾炜[1,3] 李亚明[4] 

机构地区：[1]同济大学建筑工程系,上海200092 [2]同济大学先进土木工程材料教育部重点实验室,上海200092 [3]上海同吉建筑工程设计有限公司,上海200092 [4]上海建筑设计研究院有限公司,上海200041

出　　处：《建筑结构》2011年第3期55-58,83,共5页Building Structure

基　　金：中华人民共和国行业标准<预应力混凝土结构设计规范>研究项目;上海市科委科技支撑计划资助项目(09231201102);上海市科委<现代预应力成套技术>资助项目(0907H194200);高等学校博士学科点专项科研基金(20090072110051)资助项目;合肥市重点工程建设管理局科研项目(2010CGAZ0669)

摘　　要：某综合体育馆训练场为大跨度预应力混凝土框架结构,其主梁次弯矩值与按平面框架结构计算的结果存在较大差异,主梁次轴力最大值占主轴力的8.9%。利用有限元分析研究了该结构次弯矩的分布特点,并分析了原因。横向各榀框架的竖向位移通过次梁相互影响,次梁在端部受到的框架柱和非预应梁的强约束加剧了这种影响。按平面框架计算的次弯矩与空间框架计算的结果相比,最大误差达到1 435%。影响主梁次弯矩的主要因素是次梁的截面尺寸和主梁跨度,次梁预应力筋配筋量的影响很小。最后,根据次弯矩分布特点对设计提出了建议。The training place of a comprehensive gymnasium is a large-span pre-stressed concrete frame structure,in which secondary moment of the main beam is quite different from the results calculated through plane frame model,and the maximum secondary axial force accounts for 8.9 percent of the primary axial force.The characteristic of the secondary moment was analyzed through FEA.The vertical displacements of lateral frames interact through secondary beams,and strong constraint to secondary beams produced by columns and frame beams exacerbates this effect.The maximum percentage error of secondary moment is 1435 percent.Main factors affecting the secondary moment are the size of secondary beam section and span of the main beam,while the pre-stress reinforcement ratio of secondary beam has little effect.At last,suggestions were proposed for design.

关 键 词：预应力 次内力 空间性能 约束分布 

分 类 号：TU378.2[建筑科学—结构工程]