地震荷载作用下条形基础地基动承载力的近似解
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摘要
在地震荷载作用下,假定地基滑动面为Prantle滑动面。通过地震系数将静土压力计算扩大到动土压力。利用拟静力法和极限平衡分析方法,导出条形基础均质地基动承载力的近似解答。讨论了地震作用下地基动承载力系数的影响因素,给出了地基动承载力系数随内摩擦角、水平地震系数和竖向地震系数的变化规律,并与其他作者的结果进行了比较。
Prantle model is adopted to simulate the behavior of the ground slope face under earthquake excitations.The computation of earth pressure is extended to dynamic cases from static cases by the help of seismic coefficient.By employing pseudo-stastic approach and the method of limit equilibrium,the approximate solution of seismic bearing capacity of strip foundation is derived.The factors affecting the seismic bearing capacity are discussed.The seismic bearing capacity depends on inner friction angle,as well as horizontal and vertical seismic coefficient.The analyzing results are compared with some published results finally.
Prantle model is adopted to simulate the behavior of the ground slope face under earthquake excitations.The computation of earth pressure is extended to dynamic cases from static cases by the help of seismic coefficient.By employing pseudo-stastic approach and the method of limit equilibrium,the approximate solution of seismic bearing capacity of strip foundation is derived.The factors affecting the seismic bearing capacity are discussed.The seismic bearing capacity depends on inner friction angle,as well as horizontal and vertical seismic coefficient.The analyzing results are compared with some published results finally.
引文
[1]唐谚哲,陈昌富.邻近斜坡地基地震承载力计算新方法[J].湖南大学学报(自然科学版),2008,35(4):1―6.Tang Yanzhe,Chen Changfu.A new calculation method for the seismic bearing capacity of shallow stripfootings close to slope[J].Journal of Hunan University(Natural Sciences),2008,35(4):1―6.(in Chinese)
[2]陈昌富,唐仁华,唐谚哲.地震荷载作用下条形基础地基动承载力统一强度理论解[J].水文工程地质,2007(2):57―62.Chen Changfu,Tang Renhua,Tang Yanzhe.Determination of seismic bearing capacity of strip foundation based on the unified strength theory[J].Hydrogeology&Engineering Geology,2007(2):57―62.(in Chinese)
[3]郑惜平.考虑地震影响的地基极限承载力的理论解析解[J].水文工程地质,2001(6):8―12.Zheng Xiping.Theoretic calculation of the limiting bearing capacity of foundations under seismic influence[J].Hydrogeology&Engineering Geology,2001(6):8―12.(in Chinese)
[4]Sarma S K,Iossifelis I S.Seismic bearing capacity factors of shallow strip footings[J].Geotechnique,1990,40(2):265―273.
[5]Richards R,Elms D G,Budhu M.Seismic bearing capacity and settlement of foundations[J].Geotechnical Engineering,ASCE,1993,119(4):662―674.
[6]Soubra A H.Upper bound solutions for bearing capacity of foundations[J].Geotechnical and Geoenvironmental Engineering,ASCE,1999,125(1):59―69
[7]Soubra A H.Seismic bearing capacity of shallow strip footings in seismic conditions[J].Geotechnical Engineering,ASCE,1997,125(4):230―241.
[8]Dormieux L,Pecker A.Seismic bearing capacity of foundations on cohesionless soil[J].Geotechnical Engineering,ASCE,1995,121(3):300―303.
[9]Deepankar Choudhury,Kanakapura S Subba Rao.Seismic bearing capacity of shallow strip footings[J].Geotechnical and Geological Engineering,2005,23:403―418.
[10]Subba Roul K S,Deepankar Choudhury.Seimic passive earth pressures in soils[J].Journal of Geotechnical and Geoenvironmental Engineering ASCE.2005,(4):131―135.
[2]陈昌富,唐仁华,唐谚哲.地震荷载作用下条形基础地基动承载力统一强度理论解[J].水文工程地质,2007(2):57―62.Chen Changfu,Tang Renhua,Tang Yanzhe.Determination of seismic bearing capacity of strip foundation based on the unified strength theory[J].Hydrogeology&Engineering Geology,2007(2):57―62.(in Chinese)
[3]郑惜平.考虑地震影响的地基极限承载力的理论解析解[J].水文工程地质,2001(6):8―12.Zheng Xiping.Theoretic calculation of the limiting bearing capacity of foundations under seismic influence[J].Hydrogeology&Engineering Geology,2001(6):8―12.(in Chinese)
[4]Sarma S K,Iossifelis I S.Seismic bearing capacity factors of shallow strip footings[J].Geotechnique,1990,40(2):265―273.
[5]Richards R,Elms D G,Budhu M.Seismic bearing capacity and settlement of foundations[J].Geotechnical Engineering,ASCE,1993,119(4):662―674.
[6]Soubra A H.Upper bound solutions for bearing capacity of foundations[J].Geotechnical and Geoenvironmental Engineering,ASCE,1999,125(1):59―69
[7]Soubra A H.Seismic bearing capacity of shallow strip footings in seismic conditions[J].Geotechnical Engineering,ASCE,1997,125(4):230―241.
[8]Dormieux L,Pecker A.Seismic bearing capacity of foundations on cohesionless soil[J].Geotechnical Engineering,ASCE,1995,121(3):300―303.
[9]Deepankar Choudhury,Kanakapura S Subba Rao.Seismic bearing capacity of shallow strip footings[J].Geotechnical and Geological Engineering,2005,23:403―418.
[10]Subba Roul K S,Deepankar Choudhury.Seimic passive earth pressures in soils[J].Journal of Geotechnical and Geoenvironmental Engineering ASCE.2005,(4):131―135.
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