山东大学学报 (工学版) ›› 2023, Vol. 53 ›› Issue (3): 88-95.doi: 10.6040/j.issn.1672-3961.0.2021.531
于洋1,石南2,高磊3,赵国浩3,张峰3
YU Yang1, SHI Nan2, GAO Lei3, ZHAO Guohao3, ZHANG Feng3
摘要： 基于12片不同跨径预应力混凝土空心板梁的抗剪承载力试验,针对板梁破坏模式、极限承载力等开展分析,研究预应力混凝土空心板梁的抗剪性能,总结已有空心板梁抗剪承载力计算方法并通过试验结果进行校验。分析混凝土和箍筋的抗剪承载力,提出基于斜裂缝水平投影的抗剪承载力计算公式。研究结果表明,各试验梁均表现为剪压破坏,梁端钢绞线产生滑移。当梁剪跨比增大时,极限荷载减小,而加载点位移增大。不同方法计算得到的试验梁安全评价和离散度均是JTG3362规范最大,Marí模型最小;提出的考虑斜裂缝水平投影长度的抗剪承载力预测模型,抗剪承载力试验结果与预测模型比值为1.10,实现对空心板梁极限抗剪承载力的更准确预测。
中图分类号:
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