门式刚架加固的简化内力计算方法

The Force Simplified Analysis Method in the Reinforcement of the Gabled Frames

门式刚架作为一种特殊的轻型结构形式,在实际工程中得到广泛的应用。对于一些已经建成的门式刚架钢结构房屋,使用方可能会要求改变其结构使用用途,需要对原主要受力构件(梁、柱等)进行加固,通常的方法是增加构件截面尺寸,以达到承载力设计要求。由于原结构构件已经处于受力状态,若直接考虑原截面的初始变形、初始应力及支承条件的改变,采用一次分析的方法,则整个结构体系属于状态非线性结构,考虑初始条件、采用顺序加载的方法比较繁琐,且易出错。本文采用"分阶段分析,线性叠加"的方法,可以准确地求出各构件截面的内力,此方法概念清晰,操作简捷,对其它类似改造的钢结构房屋同样适用。

Gabled frames was used in practical project widely as a kind of special structure,in some time,the structure purpose was changed by the investor,it is necessary that the main member section was reinforced by magnifying section dimension.some member of the old structure was among the stressing,if the initial deformation,the initial stress and the support condition was considered at one time,the whole structure was non-linear structure,it is very difficult to solve the structure.In this paper,a kind of new force analysis method is provided,in which every structure part was solved alone and then linear-overlaped,And this method can be also used in the similar reinforcement engineering.