预应力混凝土薄壁曲线梁空间分析的刚度法──Ⅱ．薄壁曲线梁预应力的空间分析与应用实例  

THREE-DIMENSIONAL STIFFNESS ANALYSIS OF P.C. CURVED THIN-WALLED GIRDERS Ⅱ.THREE-DtheENSIONAL ANALYSIS FOR THE PRESTRSSSING OF THE CURVED THIN-WALLED GIRDER AND ITS APPLICATION TO THE ANALYSIS OF P.C. CURVED BOX GIRDEER BRIDGE IN DA-LIAN

作　　者：任茶仙[1] 黄剑源[1] 

机构地区：[1]宁波大学土木建筑工程系

出　　处：《宁波大学学报（理工版）》1994年第2期81-91,共11页Journal of Ningbo University：Natural Science and Engineering Edition

基　　金：浙江省自然科学基金

摘　　要：本文通过矢量分析和伏拉索夫曲线梁平衡微分方程将曲线梁中任一空间预应力筋的作用换算成等代空间荷载，然后根据薄壁曲线架空间翘曲单元的刚度矩阵与等效节点法算式，可以方便地应用通常的刚度法进行预应力混凝土薄壁曲线架的空间结构分析。为了验证方法的正确性，通过与美国Ｓｃｏｒｄｅｌｉｓ用曲线有限条法的计算结果以及一个预应力混凝土曲线梁模型实验的一比较，表明本文对曲线梁预应力空间分析所提供的方法具有足够的精确性。最后结合一工程实例对预应力引起的曲线架内力作了分析。Based on the vectors analysis and Vlasov curved girder differential equations,the equivalent spatial loads for an arbitrarily acting pnstrereing tendon force are developed. According to the stiffness matrix formulation of a spatially curved,thin-walled beamelement and the computational formulae for the equivalent nodal forces given by part I of this paper. It is possible for the three-dimensional strUctural analysis of P.C. Curved girder bridges by the stiffness method.A comparision with the mumerical deta of P.C. curved continuous box girder bridge obtained by the curVed finite strip method and its model test of Scordelis demonstrates the accuraCy and appliability of the method.As a practical application,this method has beed used to analyze a curved P.C. bridge in Da-Lian.Part of the results are listed at the end of this paper.

关 键 词：预应力混凝土结构 空间分析 曲线梁 

分 类 号：TU973.2[建筑科学—结构工程]