考虑温度变化的碾压混凝土拱坝地震响应分析  

作　　者：魏彦军 

机构地区：[1]山东省水利勘测设计院有限公司,山东临沂276000

出　　处：《科技创新与应用》2023年第31期89-93,共5页Technology Innovation and Application

摘　　要：常态混凝土拱坝通常采用柱状分块方式浇筑,施工期通过坝内埋设冷却水管基本将混凝土水化热温升消除,对拱坝运行期的应力状态影响甚微;碾压混凝土拱坝的施工通常采用全断面通仓碾压法,施工期碾压混凝土水化热温升所产生的温度应力随坝体温度的回降持续影响拱坝运行期的应力状态。因此,碾压混凝土拱坝的应力状态与常态混凝土拱坝相比截然不同,且大体积混凝土受温度荷载的作用不容忽视,考虑温升、温降对碾压混凝土拱坝进行坝体应力分析是十分必要的。The normal concrete arch dam is usually poured by column block method,and the hydration heat temperature rise of concrete is basically eliminated by embedding cooling water pipes in the dam during construction,which has little effect on the stress state of arch dam during operation.Full-section through-silo compaction method is usually used in the construction of roller compacted concrete(RCC)arch dam,and the temperature stress caused by hydration heat rise of RCC during construction continues to affect the stress state of arch dam during operation with the fall of dam body temperature.Therefore,the stress state of RCC arch dam is completely different from that of normal concrete arch dam,and the effect of mass concrete under temperature load can not be ignored.Considering temperature rise and temperature drop,it is essential to analyze the stress of RCC arch dam.

关 键 词：碾压混凝土 拱坝 温度变化 地震响应 反应谱 

分 类 号：TU37[建筑科学—结构工程]