摘要
大跨度钢结构网架的杆件容易受温度的影响而伸长或缩短从而产生温度应力,在多次温度应力交替作用下钢结构连接处的焊缝成为应力集中点,有可能产生破坏使结构失效[1];网架结构的支座节点应能保证平安牢靠的传递支承反力,由于钢网架结构是高次超静定的杆件体系,不同的约束条件有可能导致杆件内力和支座反力的转变,这将直接影响杆件的内力和位移,且若支座节点的构造不符合计算假定,甚至还会造成杆件内力变号的情况。所以杆件的温度应力和支座形式应受到足够的重视。通过调整不同的温度应力和支座约束形式,对比分析了不同工况下钢结构网架的计算结果,分析了温度应力和支座约束对钢结构网架各项指标的影响,旨在最大程度上提高钢网架结构的安全性、经济性及合理性。
The members of the large-span steel structure grid are easy to stretch or shorten under the influence of temperature to produce temperature stress. Under the alternating action of multiple temperature stresses, the weld at the connection of the steel structure becomes the stress concentration point, which may cause damage and make the structure invalid[1];The support node of the grid structure should be able to ensure safe and reliable transmission of the support reaction. Because the steel grid structure is a high order statically indeterminate member system, different constraint conditions may lead to the transformation of the internal force of the member and the support reaction, which will directly affect the internal force and displacement of the member. If the structure of the support node does not conform to the calculation assumptions, even the internal force of the member will change. Therefore, the temperature stress of the bar and the type of the support should be paid enough attention. In this paper, by adjusting different temperature stress and support constraint forms, the calculation results of steel structure grid under different working conditions are compared and analyzed, and the influence of temperature stress and support constraint on various indexes of steel structure grid is analyzed, in order to maximize the safety, economy and rationality of steel grid structure.
作者
张如月
安然
ZHANG Ruyue;AN Ran(Baoding Institude of Architecture Design Co.,Ltd.,Baoding 071000,China)
出处
《建筑结构》
CSCD
北大核心
2022年第S02期583-586,共4页
Building Structure
关键词
钢结构网架
温度应力
支座约束
steel structure grid
temperature stress
support constraint
