钢筋混凝土正截面极限承载力通用算法  

General Algorithm for Ultimate Capacity of Reinforcement Concrete Cross Sections

作　　者：金玉娟[1] 李彬 

机构地区：[1]武汉理工大学交通学院,武汉430063 [2]中铁第四勘察设计集团有限公司,武汉430063

出　　处：《武汉理工大学学报》2010年第11期58-61,共4页Journal of Wuhan University of Technology

摘　　要：双向压弯作用下,为快速有效的求解钢筋混凝土构件正截面极限承载力,提出一种通用算法,并编制了相应的计算程序。基于平截面假定列出非线性平衡方程组,通过直接迭代求解与给定外力对应的应变场,在此基础上通过试算求得该截面的极限承载力。该算法适用于任意形状的截面和任意的材料本构关系。大量计算实例证实了该算法稳定收敛且结果准确,给出了其中两种典型截面算例的收敛曲线和计算结果的对比表。该算法为工程设计人员提供了一种简明有效的计算正截面极限承载力的方法。A general algorithm is presented that allows for the efficient evaluation of arbitrary shaped sections subjected to biaxial bending and axial load,and a corresponding computer program is developed.The no-linear equilibrium equations were listed according to plane hypothesis.Strain field corresponding to the given external forces is evaluated by direct iteration,thus the ultimate capacity can be captured by trial.This algorithm is applicable to arbitrary shaped sections and any constructive law.Both the accuracy of the results and the steady convergence have been extensively tested for a wide range of RC sections,moreover the convergence curve and the comparison results of two typical examples were shown in the article.Consequently,this algorithm provided a method which can concisely and efficiently calculate the ultimate capacity of arbitrary shaped sections for structural designers.

关 键 词：正截面极限承载力 双向压弯 非线性 直接迭代 任意形状截面 

分 类 号：TU312[建筑科学—结构工程]