高强高性能混凝土高温爆裂机理研究进展  

THE MECHANISM OF EXPLOSIVE SPALLING OF HIGH STRENGTH AND HIGH PERFORMANCE CONCRETE EXPOSED TO ELEVATED TEMPERATURE

作　　者：王里[1] 刘红彬[1,2] 鞠杨[2,3] 刘金慧[1] 田开培[4] 葛志顺[1] 

机构地区：[1]中国矿业大学(北京)力学与建筑工程学院,北京100083 [2]中国矿业大学(北京)煤炭资源与安全开采国家重点实验室,北京100083 [3]中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州221008 [4]斯图加特大学建材研究所

出　　处：《力学与实践》2014年第4期403-412,共10页Mechanics in Engineering

基　　金：教育部高等学校博士学科点专项科研基金(20110023110015);国家杰出青年科学基金(51125017);北京市教委共建资助项目

摘　　要：高强高性能混凝土已得到广泛应用,然而高温或火灾下的性能衰减与爆裂成为制约其应用的瓶颈问题,高温爆裂破坏机理尚不清楚.该文对国内外高温或火灾下高强高性能混凝土爆裂机理的研究进行综述,阐述了蒸汽压、热应力、热开裂3种热爆裂机理及其影响因素,分析了目前研究存在的困难与挑战.提出建立一个以蒸汽压致爆机理为主,热应力和热开裂机理为辅的多因素耦合的爆裂模型来定量分析高强高性能混凝土的高温爆裂机理.High strength and high performance concrete （HSC/HPC） enjoys a wide application. However, the performance degradation and the thermal spalling under high temperature or fire is a bottleneck problem in its applications. Especially, the spalling mechanism is an important issue demanding a thorough study. The study of the explosive spalling mechanism of high strength and high performance concrete under high temperature or fire is reviewed in this paper, with a focus on three kinds of spalling mechanism： the vapor pressure, the thermal stress and the thermal cracking and related influencing factors, the difficulties and challenges. A multi-factor coupling spalling model is established with the steam pressure as the main factor, and the thermal stress and the thermal cracking as the secondary factors, and the high temperature spalling mechanism of HSC/HPC is quantitatively analyzed.

关 键 词：高强高性能混凝土 爆裂 高温 机理 模型 

分 类 号：TU528[建筑科学—建筑技术科学]