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预应力混凝土简支箱梁受力性能足尺模型试验

, PP. 49-56

Keywords: 桥梁工程,预应力混凝土,足尺模型试验,受弯性能,箱梁,非线性分析

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Abstract:

?对一座30m跨径的预应力混凝土简支箱梁进行了足尺模型破坏性试验,根据试验结果对其受力过程、裂缝分布、延性性能等进行分析;用5种相关规范对箱梁抗弯极限承载力及正常使用极限状态下的变形、裂缝进行验算,以此评估规范中相应计算公式的适用性;最后编制程序对箱梁包括卸载过程在内的全过程受力性能进行了参数分析。结果表明:ACI318M-05,CEB-FIPMC90规范基本能反映箱梁正常使用极限状态下的变形性能;GB50010—2002,TB10002.3—2005规范基本能反映预应力混凝土足尺模型箱梁的裂缝特性;预应力筋的配筋率、张拉系数及预应力度对箱梁的延性影响较为明显。

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