《高规》中剪力墙偏心受压设计公式存在的问题  

Existent problems of eccentric compression design formula about shear-wall in code for tall building

作　　者：黄太华[1] 周先雁[1] 谭萍 

机构地区：[1]中南林业科技大学土木建筑与力学学院,湖南长沙410004 [2]株洲市规划设计院,湖南株洲412007

出　　处：《中南林业科技大学学报》2010年第7期123-126,共4页Journal of Central South University of Forestry & Technology

摘　　要：通过理论分析得出现《高层建筑混凝土结构技术规程》(JGJ3—2002)中正截面偏心受压承载力设计公式。采用该公式进行剪力墙设计时,在同样的轴力下配置腹筋比不配置腹筋的受弯承载力更小;从另一角度讲就是对于一组给定的轴力和弯矩,若增加腹筋的用量则必须同时增大边缘构件的钢筋用量方能满足承载力的要求,反过来若对腹筋进行减少则不仅不需增加边缘构件的钢筋用量反而可以使其减少,这显然是与现实情况严重不符的,后续的算例也佐证了此分析的正确性。有鉴于此,很有必要对现高规中正截面偏心受压承载力设计公式进行修改。Through the academic analysis,when design the shear-wall adopting the designing formula about shear-wall＇s normal section eccentric stressed bearing capacity in the current code for tall building（《Technical specification for concrete structures of tall building》 JGJ3-2002）,it is found that under the same axial power,the shear-wall with belly reinforcement＇s bending-resistance bearing capacity is less than that of the shear-wall without the belly reinforcement;in an another point of view,with a certain axial power and moment,if add the dosage of the belly reinforcement,at the same time,must add the reinforcement dosage of the edge component to satisfy the bearing capacity;on the contrary,if decrease the dosage of the belly reinforcement,it not only have no use for adding the reinforcement dosage of the edge component,but also can decrease the dosage.This is clearly not agree with the current fact,and the subsequent calculating example proved the correctness of the analysis.Therefore,it is necessary to modify the designing formula of the shear-wall＇s normal section eccentric stressed bearing capacity in the current code for tall building.

关 键 词：技术规程 剪力墙 偏心受压 正截面承载力 设计公式 

分 类 号：TU37[建筑科学—结构工程]