落锤冲击荷载作用下蒸压加气混凝土的缓冲性能试验研究  

Experimental investigation on the buffer performance of autoclaved aerated concrete under the impact load of drop weight

作　　者：周耀[1] 俞斌 郭全全[1] 马英 ZHOU Yao;YU Bin;GUO Quanquan;MA Ying(School of Transportation Science and Engineering,Beihang University,Beijing 100191,China;China Nuclear Power Engineering Co.,Ltd.,Beijing 100840,China)

机构地区：[1]北京航空航天大学交通科学与工程学院,北京100191 [2]中国核电工程有限公司,北京100840

出　　处：《振动与冲击》2019年第22期79-84,共6页Journal of Vibration and Shock

基　　金：国家自然科学基金(51578032)

摘　　要：蒸压加气混凝土落锤冲击试验考虑了试件的厚度、落距对冲击力最大值的影响。试验结果表明,一定冲击能量下试件的冲击力最大值随自身厚度增加先变小后变大,存在一个使冲击力最大值为最小的最佳厚度。提出了冲击力最大值的计算公式,公式与试验结果吻合良好,并得出了最佳厚度的计算方法。冲击过程中,冲击能量转化为缓冲层材料的表面能,转化的量随厚度先增大后减小,缓冲效果先变好后变差。The influences of the thickness of specimens and the drop height on the maximun impact force were investigated in impact tests of autoclaved aerated concrete.The test results show that the maximun impact force under a certain impact energy first reduces,then increases as the thickness increases.There is an optimum thickness to minimize the impact force.The formula for calculating the maximun impact force was proposed,by which the calculating results are in good agreement with the test results and the optimum thickness can be derived.During the impact process,the impact energy is converted into the surface energy of the buffer layer material,this surface energy increases first and then decreases with the increase of thickness,and the buffer effect first becomes better and then becomes worse.

关 键 词：蒸压加气混凝土(AAC) 落锤冲击试验 缓冲层厚度 缓冲性能 表面能 

分 类 号：TU27[建筑科学—建筑设计及理论]