变截面梁预应力计算的积分算子法  

THE METHOD OF INTEGRATION OPERATORS FOR PRESTRESSED NON-UNIFORM BEAM

作　　者：谢靖中[1] 

机构地区：[1]上海交通大学土木工程系,上海200030

出　　处：《工程力学》2006年第A01期46-51,共6页Engineering Mechanics

摘　　要：将积分算子法用于变截面梁预应力问题的计算,提出了一种新型计算方法。该方法将多段变截面梁作为一个计算单元处理,直接计算多段预应力索等效节点力和单元内力,包含了变截面梁刚度分布对等效节点荷载的影响,包含了变截面剪切变形影响。该方法克服此前方法的缺陷,为变截面梁预应力的计算提供了一种精确计算方法。Based on the method of integration operators, a new method of computing equivalent nodal forces and inner forces for prestressed non-uniform beams is presented in this paper. A non-uniform beam with multiple spans is treated as a single element, and the equivalent nodal forces and inner forces of multiple prestressed cables are directly computed. The proposed method successfully includes the influences of varied stiffness and shear deformation. It is an accurate method for computing prestressed non-uniform beam, which overcomes the shortage of previous methods.

关 键 词：变截面梁 预应力 等效节点荷载 积分算子法 直接积分 

分 类 号：TU313[建筑科学—结构工程]