单层多跨刚架在移动荷载作用下的影响量计算方法  

THE CALCULATION METHOD FOR THE INFLUENCE QUANTITY OF SINGLE-LAYER MULTI-SPAN FRAMES SUBJECT TO MOVING LOAD

作　　者：黄卷潜[1] 李丽娟[1] 

机构地区：[1]广东工业大学工程力学研究所,广东广州510006

出　　处：《工程力学》2007年第7期110-115,共6页Engineering Mechanics

基　　金：广东省自然科学基金资助项目(032489);广州市科技攻关项目(2003Z3-D0221)

摘　　要：讨论了桥梁、工业厂房和大型公共建筑中较多采用的单层多跨刚架在移动荷载作用下影响量的计算方法。以工程中计算连续梁的一次力矩分配法的概念和思路为基础,建立了结构中杆端真实抗转刚度和结点转角传递的概念及其相应计算公式,提出了一种单层多跨刚架超静定结构影响量的精确计算方法。算例表明,该方法较之传统的计算方法简捷,且既便于手算,也利于编制通用程序用于电算。The calculation method for the influence quantity is discussed for single-layer multi-span frames under moving load, which are wildly used in bridges, industrial and public buildings. Based on the concept of moment distribution method for continuous beam, the concept of anti-rotation stiffness of bar end and the transfer of node rotational angle is established, and the corresponding calculation formula is proposed. An exact calculation method is put forward to determine the influence quantity of single-layer multi-span frames under moving load. Examples show that the proposed method is simple and feasible.

关 键 词：单层多跨刚架 影响量 精确计算 真实抗转刚度 结点转角传递 

分 类 号：TU31[建筑科学—结构工程]