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EXPERIMENTAL RESEARCH ON THE MECHANICAL PERFORMANCES OF DOUBLE-BOX STEEL-CONCRETE CONTINUOUS CURVED COMPOSITE GIRDERS
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摘要: 为研究连续曲线组合梁桥在运营期的力学性能，以直埠南枢纽C匝道实际工程为背景，考虑横隔板连接方式和曲线半径的影响，设计了3根相较于实际案例缩尺比例为1∶10的连续曲线组合梁，进行4种运营工况下的静载试验，得到了试件在各工况下的荷载-挠度曲线、控制截面的应变沿梁高与横向的分布规律等。经对比研究发现：在4种运营工况下，对跨中挠度来说，荷载分布在外侧钢梁处为最不利工况；组合梁偏载系数约为1.30；曲线半径对曲线组合梁的受力性能有一定影响，横隔板的连接方式对其影响不大。
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关键词:
- 钢-混凝土连续曲线组合梁 /
- 弯扭性能 /
- 横隔板连接方式 /
- 曲线半径
Abstract: In order to study the mechanical properties of continuous curved composite girder bridges during operation, taking the actual project of ramp C of Zhibu South Junction as the background, considering the influence of the connection mode of the diaphragms and the curve radius, three continuous curved composite girders with a scale reduction ratio of 1∶10 compared with the actual case were designed. Static load tests under four operating conditions were carried out.The load-deflection curves and the distribution law of the control sections strain along the height and transverse direction under the working conditions were obtained. A comparative study found that under the four operating conditions the partial load of the outer box was the most disadvantaged for cross-center deflection. The eccentric load factor of the composite girder was around 1.30. The curve radius had a certain effect on the mechanical properties of the curved composite girder, and the connection method of the diaphragms had little effect on it. -
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