摘要
本文叙述了土中浅埋箱形结构模型动力试验结果。试验的目的是检验我们在文献[8、9]中,所提出的地表冲击波荷载作用下,土中箱形结构动力反应分析的两步法。试验有两种情况:一是利用室内模爆器进行的小模型(模型尺寸与实际结构之比约为1:40)试验;另一种是利用室外试验坑中进行的模拟平面波加载下的中等模型(尺寸缩比约为1:10)试验。试验的箱形结构有单孔与双孔两种。根据埋深与超压的不同,共进行了20炮次试验,试验对自由场中应力、结构周边压力、结构应变、结构运动等参数进行了测量。试验结果表明,所提出的两步分析法中关于土中结构内力分析的准静态法是可行的。
In the paper the dynamic model tests of shallow buried box-type structures are described. The tests were aimed at the verification of the two-step approach proposed by the second auther of this paper for the dynamic response analysis of the buried structure un der surface impulsive loading. Two kinds of testing had been conducted: One using a small blast simulator with 1/40-scaled structural model and one using the so-called High-Explosive Simulotion Technique (HEST) with 1/10-scaled structural models. In tests the ratio of the buried-depth to the structure width varied between 0. 54 to 1. 1. and the surface over pressure (0.4 to 0.8)×105Pa. In tests stresses in the free field, pressure on the structure and strains and motion parameters of the structure were measured.From the comparison between test results and theoretical calculations, it is shown that the quasi-static analysis procedure used in the proposed two-step approach is available.
出处
《爆炸与冲击》
EI
CAS
CSCD
北大核心
1990年第2期145-155,共11页
Explosion and Shock Waves
关键词
箱形
结构
冲击
荷载
模型
试验
shallow buried box-type structure, model test, soil-structure interaction.
