高温循环作用后混凝土力学性能试验研究

Experimental Study on Mechanical Properties of Concrete After Different High Temperature Cycles

采用液压伺服试验系统对经历不同温度、不同高温循环次数后混凝土的力学性能进行试验研究,分析了不同温度、不同高温循环次数对混凝土峰值应力、峰值应变、弹性模量、应力应变曲线等力学性能的影响,结果标明:高温循环后混凝土的力学性能随循环次数的增加而劣化,表现为随高温循环次数的增加,混凝土的峰值应力、弹性模量降低,峰值应变增大。此外,还探讨了高温循环后混凝土的峰值应力、峰值应变、弹性模量和应力应变关系随高温循环次数的变化规律。

The experimental studies on the mechanical properties of concrete after different high tempera-ture cycles were conducted by hydraulic servo testing system. The influence of the high temperature cy-cles on peak stress, peak strain, elastic modulus, stress-strain curve of concrete was analyzed. The test re-sults show that the mechanical properties of concrete after different high temperature cycles deteriorated with the increasing of cycling times, the peak stress and elastic modulus decreased with the increasing of cycling times, while the peak strain increased gradually. The regularity and mechamsm of compressive strength,elastic modulus,stress-strain curve of concrete affected by different numbers of high tempera-ture cycles was analyzed.