超长钢筋混凝土墙温度效应分析与控制*
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(哈尔滨工业大学土木工程学院，哈尔滨 150090)[摘要] 未设置伸缩缝的超长钢筋混凝土墙中过大温差应力将导致结构开裂，直接影响建筑物的正常使用与耐久性。结合环境温度工况及结构物热工参数分析，采用弹性有限元计算了某超长建筑地下室外墙施工与使用阶段的温差效应；基于温差应力大小及其分布特点，提出了合理布置并张拉无粘结预应力筋的温差效应控制方法，使钢筋混凝土外墙的温差拉应力为预压应力所平衡或抵消。可供超长建筑钢筋混凝土墙分析与设计计算参考。[关键词] 超长;钢筋混凝土;墙;温差效应;预应力中图分类号：TU378.1 文献标识码：A 文章编号：1002-848X(2013)S1-0669-03Analysis and control of thermal effect in a long reinforced concrete wall without expansion jointsZhou Wei(School of Civil Engineering, Harbin Institute of Technology,Abstract: The thermal variation occurs the tensile stresses in a reinforced concrete wall without expansion joints. The wall would crack due to this stress exceeding the tensile strength of concrete, which influences service state and endurance of the whole of a structure. Analyzing the temperature case and thermal paramters, the thermal stress in the joint less wall in a super long building were determined based on the elastic finite element method. Considering the magitude and distribution of the thermal stress, the post-tensioned unbounded tendons were arranged reasonably to balance or counteract the tensile stress due to temperature variation. It can be served as reference of the same structures with over long concrete walls.Keywords: over length; reinforced concrete; wall; thermal effect; prestress*国家自然科学基金项目(51108124)作者简介：周 威，工学博士，副教授，Email：zhouwei-hit@163.com。
