【摘要】 本文设计两个土-结构相互作用体系模型,在相同场地土条件下,一个仅有单独上部结构,另一个包含五个上部结构,以研究高层建筑群对场地的影响。通过分别进行的振动台试验,获取模型土在地震激励下的动力反应,研究了由于上部结构存在导致场地土动力特性、加速度反应和速度反应方面的变化。试验结果表明:上部结构的存在会使得土-结构体系的振动频率增大,且上部结构越密集,体系的频率增大越多;上部结构会使得场地土的加速度和速度减小,且结构越多,土体加速度和速度减小得越多。更多还原

【Abstract】 To study the effects on site soil and the dynamic cross effects on structures caused by the high-rise buildings,two soil-structure system control models were designed. Under the same site soil conditions,one included a single upper structure,the other included five. Two shake table tests were carried out respectively to obtain the dynamic response of the model soil under the ground vibration. The tests studied the dynamic characteristic and acceleration changes of the site soil because of the upper structures. The results showed: the frequency of the soil-structures system increases due to the buildings. The more intensive buildings there are,the more the frequency increases. The upper structures can make the acceleration and the velocity of the site soil decrease,and the more buildings there are,the more the acceleration and the velocity decrease.更多还原