混凝土重力坝的温度应力  

TEMPERATURE STRESS OF CONCRETE GRAVITY DAMS

作　　者：赵代深[1] 薄钟禾 李广远[1] 彭东育 

机构地区：[1]天津大学

出　　处：《土木工程学报》1993年第4期29-39,共11页China Civil Engineering Journal

摘　　要：本文根据热传导理论和粘弹性理论、按照混凝土大坝的施工和运行过程、采用二维和三维有限单元法、对混凝土重力坝进行了全过程仿真分析。在计算中考虑了下列因素:混凝土分层浇筑时间、浇筑温度、气温变化、水库蓄水和正常运行水位、水温变化、混凝土徐变和自生体积变形等。计算结果说明温度荷载是重力坝最重要的荷载之一,温度应力在总应力中占很大比重,特别是施工期的温度应力对大坝全过程中的应力有很大影响。本文还对重力坝的温度控制提出了问题和意见。Based on the theories of heat conduction and visco-elasticity, and according to the process of construction and operation of concrete gravity dams, the whole course simulation analysis is presented in this peper by using two and three dimensional F. E. M.. The following Factors were considered in computation, the time sequence and temperature of concrete placement, the hydration heat of concrete, the atmosphere temperature, the course of reservoir storing water, the water level and water temperature of reservoir varying with depth and time during normal operation, the creep and autogenous volume change of concrete and ect..The results obtained show that the temperature load is one of the most important loads of gravity dams and the temperature stress makes up a large percentage of total stress. Especially the temperature stress in the course of construction affect the stress of whole course outstandingly. This paper also presents some opinions on the temperature control of concrete grevity dams.

关 键 词：混凝土 重力坝 温度 应力 

分 类 号：TV642.3[水利工程—水利水电工程]