拉索预应力空间网格结构全过程设计的分析方法  

Analytical Method of Pretensioned Reticulated Structure

作　　者：邓华[1] 董石麟[1] 

机构地区：[1]浙江大学,杭州310027

出　　处：《建筑结构学报》1999年第4期42-47,共6页Journal of Building Structures

基　　金：国家自然科学基金!59878049

摘　　要：本文将拉索预应力空间网格结构中产生预应力的本质归纳为拉索的初始缺陷长度。并从初始缺陷长度的角度出发，提出了拉索预应力空间网格结构的计算分析方法。证明了该方法与将拉索张力作为外力分析方法的一致性。特别对该结构施工阶段的力学问题作了详细的分析，提出了初始缺陷不变的特点，解决由于拉索分级分批张拉所造成的预应力损失量计算的关键问题。通过文中的两个算例，验证了以上方法的正确性和有效性。In this paper, the prestress pwhuced in the pretensioned reticulated structure is considered to be basically owing to the lack of fit in tendons- From this point of view, a general analytical method for computing such 8tructures has been develoPed. It is testified that this method is coincident with the method by considering the pretension of tendons as extemal forces. Some mechanics problems in construction of this structure have been analyzed in detail. The peculiarities of the nonvariation of lack of fit are put forward, and the key problem for calculating loss of prestress due to prestressing of tendons in turn are s0lved. Finally, two numerical examples are analyzed, and it is proved that the above-mentioned method is correct and effective.

关 键 词：拉索 预应力 空间网格结构 分析方法 设计 

分 类 号：TU398.901[建筑科学—结构工程]