强震区桥台地基沉陷失效破坏机理研究
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摘要
针对汶川地震中大量桥台地基出现沉陷失效现象,对地震作用下桥台地基沉陷进行了理论研究。基于Prandtl破坏面理论和Coulomb楔体平衡条件,并考虑地震力和接触面剪切摩擦的影响,采用Mononobe-Okabe地震公式,得出地震作用下地基承载力计算公式,据此对地震下地基强度降低现象进行安全评定。
For a large number of abutment foundation failure and subgrade subsidence occurred in Wenchuan earthquake,a study on the bridge abutment ground subsidence under earthquake was made.Based on Prandtl theory and Coulomb wedge equilibrium condition,Mononobe-Okabe earthquake formula was adopted considering the impact of shear friction force of interface and the calculating formula of ground bearing capacity under earthquake was made out.According to this formula, the safety assessment of the foundation intensity reduced in earthquake could be easily carried out.
For a large number of abutment foundation failure and subgrade subsidence occurred in Wenchuan earthquake,a study on the bridge abutment ground subsidence under earthquake was made.Based on Prandtl theory and Coulomb wedge equilibrium condition,Mononobe-Okabe earthquake formula was adopted considering the impact of shear friction force of interface and the calculating formula of ground bearing capacity under earthquake was made out.According to this formula, the safety assessment of the foundation intensity reduced in earthquake could be easily carried out.
引文
[1]杜修力,韩强,李忠献,等.5.12汶川地震中山区公路桥梁震害及启示[J].北京工业大学学报,2008,34(12):1270-1279. DU Xiu-li,HAN Qiang,LI Zhong-xian,et al.5.12 earthquake damage in the mountainous roads and bridges and Enlightenment [J].Beijing University of Technology,2008,34(12 ):1270 - 1279.
[2]李鸿晶,陆鸣,温增平,等.汶川地震桥梁震害的特征[J].南京工业大学学报:自然科学版,2009,31(1):24-29. LI Hong-jing,LU Ming,WEN Zeng-ping,et al.Characteristics of bridge damages in Wenchuan earthquake[J].Nanjing University of Technology:Natural Science,2009,31(1):24 - 29.
[3]宋胜武.汶川大地震工程震害调查分析与研究[M].北京:科学出版社,2009.
[4]陈洪凯,刘荣灿.强震区桥梁墩台液化地基膨胀桩挤压加固研究[C]//汶川地震公路抗震技术文集.成都:四川人民出版社, 2010(1):67-79.
[5]Conte J P,Pister K S,Mahin S A.Influence of the earthquake ground motion process and structural properties on response characteristics of simple structures[R].EERC - 90/09,EERC,Berkeley, CA:University of California,1990.
[6]Gonzalez L,Abdoun T,Zeghal M,et al.Physical modeling and visualization of soil liquefaction under high confining stress[J]. Earthquake Engineering and Engineering Vibration,2005,4(1): 51 -55.
[7]李耘宇,胡晓敏,张嵘峰.地震液化对桥梁桩基础极限承载力的影响[J].武汉理工大学学报:交通科学与工程版,2006,30 (6):1044-1047. LI Yun-yu,HU Xiao-min,ZHANG Rong-feng.Liquefaction ultimate bearing capacity of bridge pile foundation of[J].Journal of Wuhan University of Technology;Transportation Science & Engineering, 2006,30(6):1044-1047.
[8]Veiskarami M,Jahanandish M,Ghahramani A.Application of the ZEL method in the prediction of foundation bearing capacity considering the stress level effect[J].Soil Mechanics and Foundation Engineering,2010,47(3):75 -85.
[9]Janoyan K D,Whelan M J.Intelligent Transportation Infrastructure Technologies for Condition Assessment and Structural Health Monitoring of Highway Bridges[M].London:Springer London Limited, 2010:159 -184.
[2]李鸿晶,陆鸣,温增平,等.汶川地震桥梁震害的特征[J].南京工业大学学报:自然科学版,2009,31(1):24-29. LI Hong-jing,LU Ming,WEN Zeng-ping,et al.Characteristics of bridge damages in Wenchuan earthquake[J].Nanjing University of Technology:Natural Science,2009,31(1):24 - 29.
[3]宋胜武.汶川大地震工程震害调查分析与研究[M].北京:科学出版社,2009.
[4]陈洪凯,刘荣灿.强震区桥梁墩台液化地基膨胀桩挤压加固研究[C]//汶川地震公路抗震技术文集.成都:四川人民出版社, 2010(1):67-79.
[5]Conte J P,Pister K S,Mahin S A.Influence of the earthquake ground motion process and structural properties on response characteristics of simple structures[R].EERC - 90/09,EERC,Berkeley, CA:University of California,1990.
[6]Gonzalez L,Abdoun T,Zeghal M,et al.Physical modeling and visualization of soil liquefaction under high confining stress[J]. Earthquake Engineering and Engineering Vibration,2005,4(1): 51 -55.
[7]李耘宇,胡晓敏,张嵘峰.地震液化对桥梁桩基础极限承载力的影响[J].武汉理工大学学报:交通科学与工程版,2006,30 (6):1044-1047. LI Yun-yu,HU Xiao-min,ZHANG Rong-feng.Liquefaction ultimate bearing capacity of bridge pile foundation of[J].Journal of Wuhan University of Technology;Transportation Science & Engineering, 2006,30(6):1044-1047.
[8]Veiskarami M,Jahanandish M,Ghahramani A.Application of the ZEL method in the prediction of foundation bearing capacity considering the stress level effect[J].Soil Mechanics and Foundation Engineering,2010,47(3):75 -85.
[9]Janoyan K D,Whelan M J.Intelligent Transportation Infrastructure Technologies for Condition Assessment and Structural Health Monitoring of Highway Bridges[M].London:Springer London Limited, 2010:159 -184.
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