摘要
根据现场施工条件,对丹江口大坝2次加高试验进行了温度应力仿真计算,并对现场原型监测资料进行了分析,其计算结果与原型监测结果基本一致。通过对比分析后认为:施工期的温度应力不是控制因素,最大拉应力出现在试验块温度准稳定期,气温年变化是影响新老混凝土结合面应力状态的主要因素;新老混凝土结合面开度随年气温呈周期变化,并且任一时刻,结合面都是部分脱开部分接触。
An emulation computation on thermal stress of twice heightening test of Danjiangkou Dam was carried out, the results were compared with those from safety monitoring and they were in good agreement. It is concluded that: thermal stress during construction period is not the pacing factor, for the maximal tension stress of the test block appears during quasi?steady period,and the annual variation of ambient temperature is the important factor affecting the stress state of bounding interface between freshly mixed and old concrete; the opening of the interface varies periodically with annual variation of ambient temperature, and the interface is partially open and partially close at anytime.
出处
《长江科学院院报》
CSCD
北大核心
2002年第B09期54-56,共3页
Journal of Changjiang River Scientific Research Institute
关键词
丹江口大坝
加高试验
温度应力
仿真计算
原型监测
Danjiangkou Dam
heightening test
emulation computation on thermal stress
safety monitoring
