【作者】 汪明武； IAI Susumu；

【Author】 WANG Ming-wu~1 IAI Susumu~2 1.School of Civil Engineering,Hefei University of Technology,Hefei 230009,China; 2.Kyoto University,Kyoto 611-0011,Japan

【机构】 合肥工业大学土木与水利工程学院； 京都大学防灾研究所；

【摘要】 基于30g动态离心机试验,探讨了液化场地中钢结构物的地震响应特征,研究得出液化场地和地下钢结构物侧向位移随着地震强度的增强而增大,且场地发生液化模型的钢结构物侧向位移值明显大于未发生液化模型相应的数值,且对场地发生液化的模型,钢结构物的侧向变形小于同埋深的土体变形,而对场地未液化模型中两者数值则几乎相等且较小;钢结构物侧壁承受的最大动土压力也随地震强度的增强而增大,顶板土层的剪切应力则先随地震振动而增大,但随着土层液化而迅速衰减.更多还原

【Abstract】 Consequently,the seismic performance of underground steel structures in the liquefiable soils is a complex problem.In order to insure the safety of underground structures in the liquefiable soils in the earth- quake prone area,the seismic response analysis of underground structure is of prime importance.Dynamic cen- trifuge model tests of 30 g are conducted to investigate the seismic behaviors of underground steel structures in liquefiable soils in this paper.And detailed discussions are included.Centrifuge tests with peak shaking ampli- tudes of 0.2246,1.1637,1.9224,4.9457 and 8.2569 m/s~2 in prototype scale were adopted to simulate the seismic performances of steel structure in a saturated soil layer with a relative density of about 84%.It is con- cluded that the stronger the motion,the larger deformation of ground and structure are.And these values are much larger for the models,in which the soils are liquefied,with peak amplitude of 4.9457 and 8.2569 m/s~2, than for non-liquefied model with a lower input motion.The results also show that the values of earth pressure acting on the sidewalls of structure increase with the level of input motions.For liquefied models,the value of lateral displacement of structure is less than that of ground at the same buried depth.On the contrary,the both values for non-liquefied models of the other cases are almost same and smaller.更多还原