消防射水对火灾后高性能混凝土剩余抗压强度的影响  

Study on Residual Compressive Strength of High-Performance Concrete Influenced by Fire Spraying after Fire

作　　者：张泽江[1] 王珍[2] 祝杰[3] 

机构地区：[1]公安部四川消防研究所,四川都江堰611830 [2]西南交通大学科学与工程学院,成都610031 [3]西南交通大学土木工程学院,成都610031

出　　处：《防灾减灾工程学报》2010年第4期414-418,共5页Journal of Disaster Prevention and Mitigation Engineering

基　　金：国家"十一五"科技支撑项目(2006BAK06B06);公安部消防局重点科研项目(2008XFGG005)资助

摘　　要：对火灾后消防射水对高性能混凝土(HPC)剩余抗压强度的影响进行了研究。分析了在不同温度、不同冷却方式条件下,C40HPC剩余抗压强度的变化规律,并利用ORIGIN 7.5软件,拟合了高温作用后HPC剩余抗压强度与温度之间的关系。研究表明:消防射水对高温作用后的HPC的剩余抗压强度的影响很大,射水冷却后的HPC剩余抗压强度明显低于自然冷却后的剩余抗压强度;随着破坏温度的升高,经消防射水冷却的HPC剩余抗压强度呈衰减状态。最后,建立了自然冷却及消防射水冷却条件下,C40HPC剩余强度与火场温度之间的二元回归曲线公式。Discussing the residual compressive strength of high-performance concrete （t/PC） influenced by fire spraying after fire. The variation of compressive strength of C40 HPC at different temperatures and by using different cooling methods is analyzed. The relationship of residual compressive strength with tolerable temperature of HPC is drafted by ORIGIN 7.5 software. The results show that the residual compressive strength of HPC is in the condition of high temperature could be remarkably decreased by fire spraying. Moreover, the residual compressive strength of HPC cooled by fire spraying would continuously be decreased with the increasing of the damaging temperature of the samples. And, we get the fitting second order polynomials representing the relationship between residual compressive strength of HPC cooled by fire spraying and room temperature with fire temperature.

关 键 词：消防射水 高温 高性能混凝土(HPC) 剩余抗压强度 

分 类 号：TU528.34[建筑科学—建筑技术科学]