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平铰拱拱趾的内力分析

发表时间:2009-01-31  浏览量:1860  下载量:616
全部作者: 王喜刚,张彬
作者单位: 辽宁科技学院资源与建筑工程系;辽宁工程技术大学土木建筑工程学院
摘 要: 平铰拱理论是介于无铰拱和两铰拱之间的理论。当拱脚开裂时,拱脚不是像无铰拱脚只承担着弯矩的作用,也不像两铰拱只承受着轴力的作用,而是同时承担弯矩和轴力的作用,因此,采用平铰拱理论来分析此时的拱桥。针对服役石拱桥部分截面开裂或人为设缝后,仍然正常工作的现状,研究了平铰拱基本理论及相应计算方法。平铰拱理论解释了当石拱桥拱脚开裂后还能正常工作的现象,其计算结果提高了石拱桥的承载能力。用平铰拱理论来进行石拱桥结构分析,其计算结果更接近于实际受力状态,并对平铰拱拱趾处进行了迭代计算。这对服役石拱桥的承载力评估有一定的现实意义。
关 键 词: 桥梁工程;平铰拱;迭代计算;偏心弯矩Wk;拱脚;转角
Title: Analysis of internal force of flat hinged arc toe
Author: WANG Xigang, ZHANG Bin
Organization: Department of Resources and Construction, Liaoning Institute of Science and Technology; College of Civil Engineering and Architecture, Liaoning Technical University
Abstract: This paper proposes the theory of flat hinged arc which is between the non-hinged and dual-hinged arc. When arc toe crazes, non-hinged arc merely loads bending moment and dual-hinged arc axial forces, flat hinged arc bears the both actions. Therefore, it should be analyzed by theory of flat hinged arc and calculated by iterative procedure. Stone arch bridge servicing for some sections cracking or man-made after a joint, still keep the normal work of the status. Based on the basic theory and corresponding calculation method, arch-hinged theory used to carry out the structural analysis of stone arch bridge, and increase the loaded capability of the bridge. The results close to the actual state of the force, and use iterative methods to calculate arch foot. This service has the practical significance of stone arch bridge on the bearing capacity of a certain assessment.
Key words: bridge engineering; flat hinged arc; iterative procedure; eccentricity moment Wk; arc toe; rotational angle
发表期数: 2009年1月第2期
引用格式: 王喜刚,张彬. 平铰拱拱趾的内力分析[J]. 中国科技论文在线精品论文,2009,2(2):141-145.
 
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