In this article, the author takes engineering as the background, elaborates the smal box girder program of first simple support and continuous after for non-standard span, and establish the finite element model to analysis the structural int-ernal forces, mainly as the bridge and operating situation to c-alculate, and consider the effects of temperature, live load, and bearing subsidence to provide reference for similar structure d-esign.%本文以某工程为背景,对其中一联非标准跨径的先简支后连续小箱梁方案进行阐述。并建立有限元模型进行结构内力分析,计算主要以成桥及运营状态为主,考虑温度、活载、支座沉降等的影响,为同类结构设计提供了参考。
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