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为了利用有限元软件ADINA建立了焊接箍筋钢板—混凝土组合连梁数值计算模型,分别对嵌有8 mm,10 mm和12 mm钢板厚度的钢筋混凝土—钢板组合连梁的抗震性能进行计算分析。结果表明了连梁内的钢板厚度即含钢率对钢板—混凝土连梁的抗震性能具有显著的影响。连梁的抗震性能随着钢板含钢率的增大而改善。如果钢板厚度过小会导致连梁在地震时的延性和耗能性能不足;但若厚度过大会造成增大成本及施工难度增大等问题。为此,需要一个相对理想厚度的钢板,使钢板—混凝土连梁的抗震性能达到最优。
In order to establish the numerical calculation model of welded stirrup steel-concrete composite beams with finite element software ADINA, the seismic performance of reinforced concrete-steel composite beams embedded with 8 mm, 10 mm and 12 mm steel plates was calculated and analyzed respectively. The results show that the thickness of the steel plate in the joint beam, ie, the steel content, has a significant effect on the seismic performance of the steel-concrete composite beams. The seismic performance of even beams is improved with the increase of steel content. If the thickness of the steel plate is too small, the ductility and energy dissipation performance of the connecting beam during the earthquake will be insufficient. However, if the thickness is too large, the cost will increase and the construction difficulty will increase. Therefore, a relatively ideal thickness of steel plate is required to achieve the best seismic performance of steel-concrete beams.