经历荷载历史后的混凝土动态抗压试验  

EXPERIMENTAL STUDY ON DYNAMIC COMPRESSIVE PROPERTIES OF CONCRETE EXPERIENCED LOADING HISTORY

作　　者：刘俊飞[1] 田汉儒[2] 孙吉书[1] 

机构地区：[1]河北工业大学土木工程学院,天津300401 [2]长安大学建筑工程学院,西安710061

出　　处：《低温建筑技术》2012年第11期1-3,共3页Low Temperature Architecture Technology

基　　金：国家自然科学基金资助项目(50878073)

摘　　要：为了研究荷载历史对混凝土动态抗压特性的影响,应用MTS试验机对经历了30%极限抗压强度荷载历史后的C30混凝土试件进行了应变速率为1×10-5/s～1×10-2/s的单轴动态抗压试验。试验结果表明:经历荷载历史后,混凝土的动态抗压特性发生了一定程度的变化;与直接加载相比,经历荷载历史后的混凝土平均极限抗压强度、弹性模量降低了,峰值应变没有明显变化;抗压强度、弹性模量随着应变速率的增大而增大,峰值应变正好相反。In order to study the impact of the loading history of dynamic compressive properties of concrete, compressive experiments of concrete specimens（C30） experienced a 30% ultimate compressive strength loading history are carried out on MTS, with the uniaxial strain rate ranging from 100^-5/s to 10^-2/s. The test results show that after the loading history, the dynamic compressive properties of con- crete has a certain degree of change; compared with the direct load, the average ultimate compressive strength and elastic modulus of concrete would decrease after the loading history, but the peak strain did not change significantly;compressive strength and elastic modulus would increase with the strain rate in- creasing, but the peak strain is just the opposite.

关 键 词：荷载历史 混凝土 应变速率 抗压特性 试验研究 

分 类 号：TU528.0[建筑科学—建筑技术科学]