减震沟尺寸对塌落冲击振动影响的试验研究  

Experimental study on effect of damping ditch size on impact vibration of collapse

作　　者：蓝鹏[1] 吴枫 刘军[1,3] 刘明清[1] 张超 

机构地区：[1]河海大学安全与防灾工程研究所,江苏南京210098 [2]上海地质调查研究院,上海200072 [3]河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京210098

出　　处：《能源与环保》2018年第1期99-106,共8页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

基　　金：国家自然科学基金项目(51174076)

摘　　要：塌落冲击振动的减震效果是拆除工程中的研究重点。为了研究减震沟尺寸对塌落冲击振动的影响规律,采用现场试验,设计了简化的落锤冲击振动试验来模拟拆除工程中建筑物塌落触地冲击,通过改变减震沟的尺寸得到不同条件下的地面振动响应。利用回归分析得到了不同减震沟尺寸下塌落冲击振动传播规律。研究表明:减震沟的长度与深度对减震效果影响最大,在减震沟后方一定距离内减振效果显著。The damping effect of collapse vibration was the focus of the study in the demolition project. In order to study the law of the influence of damping ditch size on the impact vibration of collapse,field tests were conducted,and a simplified drop hammer impact vibration test was designed to simulate the collapse of a building in a demolition project,the ground vibration responses under different conditions were obtained by changing the size of the damping ditches. The propagation law of impact vibration under different damping ditches was obtained by regression analysis. The results showed that the length and depth of the damping ditches had the greatest influence on the damping effect,in some certain distance behind the damping ditch,the damping effect was significant.

关 键 词：冲击振动 减震沟尺寸 振动速度 回归分析 

分 类 号：TU746.5[建筑科学—建筑技术科学]