(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)

［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。

［关键词］早龄期混凝土；余震；抗压强度；损伤

中图分类号：TU528文献标识码：A文章编号：1002-848X(2011)03-0069-03

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

Jin Zhenli1, Yang Junjie1, Ying Yimiao2, Zhang Xuefeng2, Zheng Shuguang2

(1 College of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310014, China; 2 Architectural

and Planning Design & Research Institute Co., Ltd of Zhejiang University of Technology, Hangzhou 310014, China)

Abstract: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.

Keywords:early-age concrete; aftershock; compressive strength; damage

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)。

作者简介：金臻丽，硕士研究生，Email: jinzhenli1985@163.com。

参考文献

［1］张治泰,邱平.超声波在混凝土质量检测中的应用［M］.北京:化学工业出版社,2006.

［2］楼志文. 损伤力学基础［M］. 西安：西安交通大学出版社,1991.

［3］金贤玉,钱春,钱在兹. 对早龄期混凝土产生损伤的试验研究与分析［J］.土木工程学报, 1997, 30(6)：47-51.