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本文对采用预制钢筋砼板和现浇层砼共同形成翼缘这种新型连续钢—砼组合梁进行了试验研究。阐述了这些试验梁的基本性能,内力重分布过程和破坏形态。对支座截面和跨中截面的极限抗弯强度计算方法提出了建议。本文还对这种连续梁的使用极限状态进行了讨论且得到了能满足使用阶段要求的支弯座矩调幅系数最大值。
In this paper, a new type of continuous steel-truss composite beam with prefabricated reinforced concrete slabs and cast-in-situ concrete flanges was studied. The basic properties of these test beams, the internal force redistribution process and the failure modes are described. The proposed method for calculating the ultimate bending strength of the bearing cross-section and mid-span section is proposed. This article also discusses the use limit state of this continuous beam and obtains the maximum value of the branch bending moment modulation factor that can meet the requirements of the use stage.