土-高层建筑群相互作用对场地土影响的试验研究
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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。
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.
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.
引文
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[8]李培振,程磊,吕西林,等.可液化土-高层结构地震相互作用振动台试验[J].同济大学学报:自然科学版,2010,38(4):467-474.LI Peizhen,CHEN Lei,LU Xilin,et al.Shaking table testing on high-rise buildings considering liquefiable soil-structure interaction[J].Journal of Tongji University:Natural Science,2010,38(4):467-474.(in Chinese)
[9]Tabatabaiefar S,Fatahi Behzad,Samali Bijan.Numerical and experimental investigations on seismic response of building frames under influence of soil-structure interaction[J].Advances in Structural Engineering,2014,17(1):109-130.
[2]Bhattacharya S,Nikitas N,Gamsey J,et al.Observed dynamic soil-structure interaction in scale testing of offshore wind turbine foundations[J].Soil Dynamics and Earthquake Engineering,2013,54(9):47-60.
[3]刘晶波,刘祥庆,王宗纲,等.土-机构动力相互作用系统离心机振动台模型试验[J].土木工程学报,2010,43(11):114-121.LIU Jingbo,LIU Xiangqing,WANG Zonggang,et al.Dynamic centrifuge model test of a soil-structure interaction system[J].China Civil Engineering Journal,2010,43(11):114-121.(in Chinese)
[4]Celebi M.Seismic responses of two adjacent buildings:Interaction[J].Journal of Structural Engineering,1993,119(8):2477-2492.
[5]Mahmoud Yahyai,Masoud Mirtaheri et al.Soil Structure Interaction between Two Adjacent Buildings under Earthquake Load[J].American Journal of Engineering and Applied Sciences,2008,1(2):121-125.
[6]陈跃庆,吕西林,侯建国,等.不同土性地基中地震波传递的振动台模型试验研究[J].武汉大学学报(工学版),2005,38(2):49-53.CHEN Yueqing,LU Xilin,HOU Jianguo,et al.Shaking table model testing on transfer of earthquake wave in various ground soils[J].Engineering Journal of Wuhan University,2005,38(2),49-53.(in Chinese)
[7]陈跃庆,吕西林,李培振,等.不同土性的地基-结构动力相互作用振动台模型试验对比研究[J].土木工程学报,2006,39(5):57-64.CHEN Yueqing,LU Xilin,LI Peizhen,et al.Comparative study on the dynamic soil-structure interaction system with various soils by using shaking table model tests[J].China Civil Engineering Journal,2006,39(5):57-64.(in Chinese)
[8]李培振,程磊,吕西林,等.可液化土-高层结构地震相互作用振动台试验[J].同济大学学报:自然科学版,2010,38(4):467-474.LI Peizhen,CHEN Lei,LU Xilin,et al.Shaking table testing on high-rise buildings considering liquefiable soil-structure interaction[J].Journal of Tongji University:Natural Science,2010,38(4):467-474.(in Chinese)
[9]Tabatabaiefar S,Fatahi Behzad,Samali Bijan.Numerical and experimental investigations on seismic response of building frames under influence of soil-structure interaction[J].Advances in Structural Engineering,2014,17(1):109-130.
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