钢桁架与砼组合梁滑移及掀起的空间计算分析

Analysis of Interface Slip and Lift Displacement on Composite Beams of Steel Truss and Concrete by Finite Element Method

介绍了钢桁架与混凝土组合梁的三维空间分析系统 ,对芜湖长江大桥主桥的主梁即采用钢桁架与混凝土组合梁作详尽的空间有限元计算分析 ,得到了组合梁的交接面滑移、竖向掀起位移沿梁长分布及刚度变化对其影响的图形 ,并详尽地分析了交接面滑移、竖向掀起位移沿梁长分布规律、连接件受力性能及交接面的连接程度对组合梁的刚度影响 ,为钢桁架与混凝土组合梁的设计提供可靠的理论依据·

Spatial analysis system for the composite beams of steel truss and concrete is presented. The long main span of the cable stayed Wuhu bridge with composite beams of steel truss and concrete on Yangtse River was analyzed using the system by finite element method. The distribution graphs of the interface slip and lift displacement along the longitudinal directions of the beam are obtained. The function of the interface slip and lift displacement and the shear mechanism of the connector are shown on the composite beams.The system can provide a scientific basis for the engineering design with composite beams of steel truss and concrete.