巨型钢框架-预应力复合支撑体系拉索截面积预估方法  

Estimation method on cable's sectional area of mega steel frame and pre-stressed composite brace structure

作　　者：顾盛[1,2] 唐柏鉴[1] 

机构地区：[1]江苏科技大学土木工程与建筑学院,江苏镇江212003 [2]昆山市建设工程质量检测中心,江苏昆山215337

出　　处：《中国矿业大学学报》2013年第3期489-494,共6页Journal of China University of Mining & Technology

基　　金：国家自然科学基金项目(50948035);江苏省自然科学基金项目(BK2009723)

摘　　要：确定拉索截面积是巨型钢框架-预应力复合支撑体系的关键问题,基于拉索作用建立拉索截面积的确定准则为:水平荷载作用下复合支撑内力增量平衡,并满足侧向变形要求.依据该准则及结构变形叠加原理,推导出了水平荷载作用下复合支撑的内力增量平衡方程,以及巨型层层间位移与拉索截面积之间的关系;由确定的层间位移设计目标值得到拉索截面积,最终建立了拉索截面积的定性预估理论,为巨型钢框架-预应力复合支撑体系的初步设计及定性评判奠定了基础.To determine cable＇s sectional area is one of key problems of mega steel frame and pre-stressed composite brace structure.Based on cables＇ function,the determination rules for cable＇s sectional area were presented.The inner force increasing in composite brace under horizontal load is in balance state and the lateral deformation meets code requirement.According to the rules above and the superposition principle of structural deformation,the balanced equation of inner force increased with composite brace under horizontal load,and the relationship between structural peak inter-story drift and cross section area of cable were established,respectively.Based on the principle about the structural peak inter-story drift design target value,the qualitative estimation theory on cross section area of cable is finally proposed,which is useful for primary design and performance judgement for this structure.

关 键 词：预应力钢结构 巨型框架 复合支撑 拉索截面积 

分 类 号：TU394[建筑科学—结构工程]