多层预应力巨型支撑-钢框架结构拉索初拉力预估研究  

ESTIMATION OF INITIAL TENSION OF CABLES IN MULTI-STOREY PRESTRESS-MEGA-BRACED STEEL FRAME STRUCTURE

作　　者：顾盛[1] 唐柏鉴[1] 

机构地区：[1]江苏科技大学土木工程系,江苏镇江212003

出　　处：《工业建筑》2011年第1期120-123,共4页Industrial Construction

基　　金：国家自然科学基金项目(50948035);江苏省自然科学基金项目(BK2000723)

摘　　要：基于纯钢框架结构及钢框架-支撑结构的受力特点,提出新的结构形式———预应力巨型支撑-钢框架结构体系。从理论上分析预应力巨型支撑工作机理,基于此,提出拉索初始预拉力准则,通过数值模型研究巨型支撑变形的预估方法,进而建立初始预拉力的确定理论。认为预应力巨型支撑初始预拉力以"在外部作用下,受压预应力巨型支撑剩余拉力接近零"为准则;多层预应力巨型支撑-钢框架结构的竖向位移,可以通过估算纯钢框架结构在竖向荷载下的竖向位移得到;工程范围内,拉索端点处的水平位移比较固定,钢框架的相对抗侧刚度影响较小。Based on steel frame structure and frame-brace structure,a new type of structure-prestress-mega-braced steel frame was presented.Firstly it was analyzed work principle of prestressed mega brace,then the rule of initial prestress value was proposed,further researching the estimate method of mega brace deformation to set up,theory of initial prestress in mega brace.Initial prestress value should comply in the rule that residual tension in compression brace is near to zero under exterior loads.The vertical displacement of multi-storey prestress-mega-braced steel frame structure nearly equals to the value of steel frame structure under vertical load.And the horizontal displacement at brace end keeps fixed,no matter how to alter the relative stiffness of steel frame.

关 键 词：预应力钢结构 巨型支撑 钢框架 初拉力准则 侧移模式 

分 类 号：TU394[建筑科学—结构工程]