某两层钢筋混凝土框架结构厂房温度作用计算分析

Calculation and analysis of temperature action of a two-story reinforced concrete frame structure workshop

考虑到设缝结构给建筑节点做法带来的诸多问题,越来越多的建筑结构不设置伸缩缝,采用超长结构。超长结构计算时应考虑温度作用对结构的不利影响。基于弹性有限元模型,采用简化的弹性分析方法考虑混凝土徐变,即徐变应力折减系数法,同时温度作用中计入了混凝土收缩当量温差,在此基础上,分析了超长钢筋混凝土框架结构在温度作用下的内力及变形特点,并与设缝结构进行对比,给出了超长结构配筋特点及加强措施。

In view of the many problems caused by the structure with expansion joints to the construction node practice,more and more building structures do not set expansion joints,using ultra-long structures.The adverse effect of temperature on the structure shall be considered in the calculation of ultra-long structure.In this paper,based on elastic finite element model,a simplified elastic analysis method is adopted to consider concrete creep,namely the creep stress reduction coefficient method.At the same time,the equivalent temperature difference of concrete shrinkage is included in the temperature action.On this basis,the internal forces and deformation characteristics of ultra-long reinforced concrete frame structure under the action of temperature are analyzed,and compared with the Parted structure.The reinforcement characteristics and reinforced measures of ultra-long structure are given.