Influence of isolated footing embedment on the seismic performance of building considering the soil-foundation-structure interaction:An experimental approach  

作　　者：Vaibhav Mittal Manojit Samanta D.P.Kanungo 

机构地区：[1]CSIR-Central Building Research Institute(CSIR-CBRI),Roorkee,247667,India [2]Academy of Scientific and Innovative Research(AcSIR),Ghaziabad,201002,India

出　　处：《Journal of Rock Mechanics and Geotechnical Engineering》2025年第2期1194-1212,共19页岩石力学与岩土工程学报(英文)

基　　金：fellowship received from the Department of Science and Technology(DST)under a unique scheme,“Innovation in Science Pursuit for Inspired Research(INSPIRE),”under the file number 20190000871,during the present work。

摘　　要：The present study investigates the influence of embedment depth of isolated footing supporting moment-resisting frame buildings through scaled-down tests.These experiments utilize scaled models representing different building aspect ratios and footing embedment depths.All the model tests are subjected to scaled-down input ground motions of different intensities and magnitudes.These model tests are performed in laminar shear containers through shake table testing.The results obtained for different cases of soil-foundation-structure systems and fixed-base conditions are expressed in terms of natural frequency,peak spectral acceleration,frequency response,lateral deformation,inter-storey drifts,and rocking of the foundation.The analysis reveals that the natural frequency of the coupled system on isolated footings diminishes by 27.52%–58.21%relative to fixed-base conditions,highlighting the significance of accounting for soil-foundation-structure interaction effects.Moreover,a notable increase of 52.97%in the natural frequency of the coupled system is observed as the embedment depth of the footing increases from 0.75 to 6.Additionally,the study demonstrates that the inter-storey drift of the 5-storey building remains well within acceptable limits under dense soil conditions.Consequently,within the parameter range explored in this research,the study concludes that soil-foundation-structure interaction effects are insignificant for low-rise buildings(H≤15 m)supported on isolated footings during seismic events.

关 键 词：Shake table test Isolated footing Soil-foundation-structure interaction Laminar shear box EARTHQUAKE 

分 类 号：P31[天文地球—固体地球物理学]