余震作用下早龄期混凝土强度及损伤试验  

Experimental investigation on strength and damage of early-age concrete subjected to aftershock

作　　者：金臻丽[1] 杨俊杰[1] 应义淼[2] 章雪峰[2] 郑曙光[2] 

机构地区：[1]浙江工业大学建筑工程学院,杭州310014 [2]浙江工业大学建筑规划设计研究院有限公司,杭州310014

出　　处：《建筑结构》2011年第3期69-71,共3页Building Structure

基　　金：浙江省科技厅资助项目"余震作用下混凝土结构施工技术研究"(2009C16076)

摘　　要：汶川地震灾后重建项目是在不断发生的余震中开工建设的,余震是否会对在建建筑物造成损伤是共同关注的问题。对早龄期混凝土试块模拟不同峰值加速度的振动扰动,通过28d的抗压强度及超声波波速的比较,研究不同龄期的新浇混凝土受振动扰动后强度及损伤的变化规律。试验结果表明,在刚性模板的试验条件下,新浇混凝土在2d后受振对后期强度及损伤影响甚微。The reconstructions after Wenchuan Earthquake suffered ongoing aftershock.It was concerned whether the new constructions in process were influenced by aftershock.Early-age concrete was subjected to different earthquake excitations at different ages.The 28 days compressive strength and ultrasonic velocity of specimens were tested and compared with the control samples.The result shows that the influence of aftershock on fresh concrete after two days is little.

关 键 词：早龄期混凝土 余震 抗压强度 损伤 

分 类 号：TU528[建筑科学—建筑技术科学]