论文部分内容阅读
将FEMA440考虑土-结构相互作用的能力谱方法与桥梁脆弱性分析相结合,提出能够综合考虑地基柔性效应、运动学效应和基础阻尼效应的桥梁脆弱性分析方法,再结合所统计的与我国桥梁抗震设计规范相容的强度折减系数谱,对某城市高架梁式桥进行脆弱性分析,建立相应的脆弱性曲线,并与非线性动力时程分析法和不考虑土-结构相互作用的脆弱性分析法所建立的脆弱性曲线进行比较。计算结果表明:所建立的考虑土-结构相互作用的脆弱性曲线与非线性动力时程分析的计算结果十分接近,而不考虑土-结构相互作用的脆弱性曲线则与实际情况有较大差距。可见,该方法可以较为准确地对考虑土-结构相互作用的桥梁结构进行脆弱性分析,这也验证了该法应用于我国桥梁结构抗震性能评估的可行性。
Combining the FEMA440 capability spectrum method considering the soil-structure interaction with the bridge vulnerability analysis, a bridge vulnerability analysis method that can comprehensively consider the foundation flexibility effect, the kinematic effect and the foundation damping effect is proposed. Combined with the statistical analysis, Seismic design code compatible with the strength reduction factor spectrum of a city viaduct beam vulnerability analysis, the establishment of the corresponding vulnerability curve, and nonlinear dynamic time-history analysis and soil-structure interaction without considering the vulnerability analysis France to establish the vulnerability curve for comparison. The calculated results show that the calculated soil-structure interaction considering the soil-structure interaction is in good agreement with the nonlinear dynamic time-history analysis, while the soil-structure interaction without considering the soil-structure interaction has a large gap with the actual situation . It can be seen that this method can more accurately analyze the vulnerability of bridge structure considering soil-structure interaction, which also verifies the feasibility of applying this method to the seismic performance evaluation of bridge structure in China.