【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。更多还原

【Abstract】 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.更多还原