利用无粘结预应力技术解决超长混凝土结构温度裂缝的有限元分析  

FINITE ELEMENT ANALYSIS ON THE TECHNIQUE TO SOLVE THE THERMAL CRACK PROBLEM OF SUPER-LENGTH REINFORCED CONCRETE STRUCTURE BY UNBONDED TENDONS

作　　者：王建仁 王春青[2] 来春景[2] 

机构地区：[1]广东珠江投资有限公司,广州510623 [2]兰州理工大学土木工程学院,兰州730050

出　　处：《建筑技术开发》2007年第6期6-8,26,共4页Building Technology Development

摘　　要：通过对一典型超长混凝土建筑结构在温降作用下响应的有限元分析,给出了该结构的温度响应变化特征,对利用无粘结预应力技术解决温度裂缝的作用效果进行了对比分析,说明利用预应力技术解决超长混凝土结构的抗裂问题是非常有效的。其计算方法和计算结果对超长混凝土建筑结构的设计有一定的参考作用。By means of finite element analysis on the response of a typical super-length concrete structure under the action of the temperature dropping, the response characteristics of the structure to the temperature was given. The effect of the technology to solve the thermal crack by unbonded tendon was analyzed. And it is illustrated that the technique of unbonded tendons was very effective for dealing with the anti-splitting problem in super-length concrete structure. This analysis method and the result could be a reference for the designs of super-length reinforced concrete structure.

关 键 词：无粘结预应力 抗裂 混凝土收缩 环境温度 有限元分析 温度应力 

分 类 号：TU378.1[建筑科学—结构工程]