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受地震扰动时,可以通过一系列方法对桥的响应进行评估。传统的方法是采用线性静态或动态分析结合适当的修正来说明非弹性响应,而现行的实践着重强调非线性静态分析方法。本研究采用线性动态分析程序,对两跨公路桥的初步地震响应进行分析以确定潜在的非弹性响应。按照两个非线性静态分析方法对桥进行分析,评估了两种方法所预测的全部响应的差别以及采用各种软件进行非线性静态分析的效率。结果显示:所采用的两种不同非线性响应预测的非线性静态分析方法,由于存在大量的简化,都不能获得正确的结果。此外,研究还揭示在综合分析和提供破坏过程图方面,一些软件更适合进行非线性静态分析(如塑性铰的性能)。
When disturbed by an earthquake, the bridge’s response can be assessed through a number of methods. The traditional approach is to use linear static or dynamic analysis with appropriate corrections to account for inelastic response, whereas current practice emphasizes nonlinear static analysis. In this study, a linear dynamic analysis program was used to analyze the preliminary seismic responses of two-span highway bridges to determine the potential inelastic response. The bridge was analyzed according to two non-linear static analysis methods to evaluate the differences between the full responses predicted by the two methods and the efficiency of the nonlinear static analysis using various software. The results show that the two non-linear static analysis methods adopted by different nonlinear response predictions can not get correct results due to a large number of simplifications. In addition, the study revealed that some software is better suited for non-linear static analysis (such as plastic hinges) in terms of comprehensive analysis and the provision of destructive process maps.