In this paper, Aimed at the four 4 × 30m simple-supported continuous beam bridges, the finite element space model is built. Through non-lineartimehistoryanalysismethods,Icalculateearthquakeintensitywithintheeightintensityregions.Usingordinaryrubberbridgesteadiesand specializedisolationsteadies,theinternalforcesofchangeattheendofthePierareanalyzed.Theconclusionthereissomevaluefortherelevanttechnical officers.%本文对四联4×30m 的先简支后连续梁小箱梁桥建立有限元空间模型，通过非线性时程分析方法，考虑8级地震裂度区域内梁桥采用普通橡胶支座和专门的减隔震支座时，分析各桥墩墩底的内力变化，得出了有一定价值的结论，供有关技术人员参考。
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