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首页> 美国政府科技报告 >Concrete Dead Load Deflections of Continuous Steel Girder Composite Bridges
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Concrete Dead Load Deflections of Continuous Steel Girder Composite Bridges

机译：连续钢梁组合桥混凝土静载挠度

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The study involved two activities: collecting data from the testing of concretecylinders and laboratory-size beams representative of composite bridge girders and developing a computer program that calculates dead load deflections during construction based on the data from the laboratory testing. The 300 concrete cylinders were tested at ages varying from 2 to 36 hours after pouring to establish stress-strain relations in axial compression. The four composite beams (20 feet long) with 16 strain gages and 4 deflection gages were tested by applying small incremental loads starting soon after the concrete was poured. Based on these measurements, the change in stiffness of the composite beam was computed and the concrete properties evaluated.

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