摘要
通过对某佛塔基础底板大体积混凝土施工难点进行分析,对浇筑前混凝土中的温度峰值、温度应力进行了模拟计算。深入研究了三种裂缝控制新技术,结果表明:加入相变材料的大体积混凝土的升、降温速率明显变得缓慢,在一定程度上减少了混凝土温度裂缝产生的概率;设置滑动支座改善约束条件,对防止大体积混凝土的开裂起到了明显的作用;充分利用混凝土自身的徐变、应力松驰特性,以时间控制裂缝,是一种消耗资源最少的方法。
Major construction difficuhies are analyzed, the maximum temperature value and temperature stress in the foundation base slab of mass concrete before casting are simulated. Three new techniques for controlling crack are researched, which proved that PCM （phase change materials） can not only lower probability of temperature crack in some degree but also can delay its speed of temperature rise or temperature reduction of mass concrete, and we will acquire a obvious effect on Preventing mass concrete from Cracking if we set sliding support, we may control cracking of mass concrete by enough time if we make use of creep and relaxation of mass concrete itself, moreover it is a good way to consume the lowest resource.
出处
《建筑结构》
CSCD
北大核心
2009年第9期70-73,110,共5页
Building Structure
基金
国家自然科学基金项目(59878044)
安徽理工大学引进人才科研启动基金
