爆炸荷载下桩基竖向动承载力研究
|
摘要
针对地面抗爆工程建设中桩基设计问题,采用动三轴试验、动力有限元方法等手段,开展了爆炸作用下地基土的动力特性及桩基抗爆承载力研究,结果表明桩基竖向极限抗爆承载力为其竖向极限静承载力2倍以上,高于按照现行桩基规范得到的1.25～1.5倍范围值,表明将常规抗震设计的办法直接用于抗爆炸冲击荷载的桩基设计时偏保守。
For the problem of pile foundation design of ground protective projects subjected to blast loading,a series of resrearches of dynamic property of soil and bearing capacity of pile under shock waves are carried out by the methods of dynamic triaxial test and dynamic FEM and so on.The result shows that the dynamic bearing capacity of pile is two times greater than that of static bearing capacity and 1.25 ～ 1.5 times greater than that of current pile code method.Therefore it is conservative to estimate the dynamic bearing capacity of pile with current pile code method.
For the problem of pile foundation design of ground protective projects subjected to blast loading,a series of resrearches of dynamic property of soil and bearing capacity of pile under shock waves are carried out by the methods of dynamic triaxial test and dynamic FEM and so on.The result shows that the dynamic bearing capacity of pile is two times greater than that of static bearing capacity and 1.25 ～ 1.5 times greater than that of current pile code method.Therefore it is conservative to estimate the dynamic bearing capacity of pile with current pile code method.
引文
[1]王后裕,等.某构筑物桩基动承载力及动力响应研究[R].北京:空军工程设计研究局,2011.WANG Houyu,et al.Study on dynamic bearing capacity of pile foundation and structure-pile-soil dynamic interaction of certain structure under blastload[R].Beijing,Air Force Engineering Design&Research Bureau,2011.(in Chinese)
[2]Davis T G,Sen R,Banerjee P K.Dynamic behaviour of pile groups in inhomogeneous soil[J].J.Geotech.Engng.ASCE,1985,111(12):1365-1379.
[3]Al-Douri R H,Poulos H G.Predicted and observed cyclic performance of piles in calcareous sand[J].J.Geotech.Engng.ASCE,1995,121(1):1-16.
[4]黄雨,叶为民,唐益群,等.地震作用下桩竖向抗震承载力的退化效应[J].岩土力学.2001,22(3):281-284.HUANG Yu,YE Weimin,TANG Yiqun,et al.Degradation effects of pile vertical seismic capacity during earthquakes[J].Rock and soil Mechan-ics,2001,22(3):281-284.(in Chinese)
[5]GJBz20419.2-98防护工程防常规武器结构设计规范[S].1998.GJBz20419.2-98 Structural Design Specifications to Resist Conventional Weapons for Protective Building Engineering[S].1998.(in Chinese)
[6]赵跃堂,郑守军,郑大亮,等.爆炸波在饱和土介质中传播时压力变化规律的试验研究[J].防灾减灾工程学报,2004,24(1):60-65.ZHAO Yuetang,ZHENG Shoujun,ZHENG Daliang,et al.Experimental investigation on pressure variation during explosion wave propagation in sat-urated soils[J].Journal of diasster Prevention and Mitigation Engineering,2004,24(1):60-65.(in Chinese)
[7]约瑟夫.E.波勒斯著,基础工程分析与设计[M].童小东等译.北京:中国建筑工业出版社,2004.Bowles J E.Foundation analysis and design[M].Beijing:China Architecture&building Press,2004.(in Chinese)
[8]JGJ94-2008建筑桩基技术规范[S].北京:中国建筑工业出版社,2008.JGJ94-2008 Technical Code for Building Pile Foundations[S].Beijing:China Architecture&Building Press,2008.(in Chinese)
[2]Davis T G,Sen R,Banerjee P K.Dynamic behaviour of pile groups in inhomogeneous soil[J].J.Geotech.Engng.ASCE,1985,111(12):1365-1379.
[3]Al-Douri R H,Poulos H G.Predicted and observed cyclic performance of piles in calcareous sand[J].J.Geotech.Engng.ASCE,1995,121(1):1-16.
[4]黄雨,叶为民,唐益群,等.地震作用下桩竖向抗震承载力的退化效应[J].岩土力学.2001,22(3):281-284.HUANG Yu,YE Weimin,TANG Yiqun,et al.Degradation effects of pile vertical seismic capacity during earthquakes[J].Rock and soil Mechan-ics,2001,22(3):281-284.(in Chinese)
[5]GJBz20419.2-98防护工程防常规武器结构设计规范[S].1998.GJBz20419.2-98 Structural Design Specifications to Resist Conventional Weapons for Protective Building Engineering[S].1998.(in Chinese)
[6]赵跃堂,郑守军,郑大亮,等.爆炸波在饱和土介质中传播时压力变化规律的试验研究[J].防灾减灾工程学报,2004,24(1):60-65.ZHAO Yuetang,ZHENG Shoujun,ZHENG Daliang,et al.Experimental investigation on pressure variation during explosion wave propagation in sat-urated soils[J].Journal of diasster Prevention and Mitigation Engineering,2004,24(1):60-65.(in Chinese)
[7]约瑟夫.E.波勒斯著,基础工程分析与设计[M].童小东等译.北京:中国建筑工业出版社,2004.Bowles J E.Foundation analysis and design[M].Beijing:China Architecture&building Press,2004.(in Chinese)
[8]JGJ94-2008建筑桩基技术规范[S].北京:中国建筑工业出版社,2008.JGJ94-2008 Technical Code for Building Pile Foundations[S].Beijing:China Architecture&Building Press,2008.(in Chinese)
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心