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-  2018 

型钢外包活性粉末混凝土组合梁的受力性能试验 Experimental of mechanical performance of shaped steel encircled with reactive powder concrete composite beams

Keywords: 型钢,活性粉末混凝土,组合梁,受力性能,破坏形态

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Abstract:

设计了1根纯型钢对比梁和3根型钢外包活性粉末混凝土(RPC)组合梁,通过试验研究型钢与RPC组合结构的受力性能.试验结果表明:在型钢四周外包1层RPC后,试验梁的承载力得到了大幅度的提升.随着RPC强度等级的提高,型钢外包RPC组合梁的开裂荷载和承载能力均有所提高,但提高的幅度并不十分明显.在剪跨比λ=1.5的情况下,型钢外包RPC组合梁最终发生了弯曲破坏,并且具有良好的延性.按照相关规范的最小配箍率配置箍筋,能有效避免发生粘结劈裂破坏.推导出了受弯承载力理论计算公式,与试验值吻合得较好.型钢外包RPC组合梁表现出优良的使用性能和耐久性能,同时能够大幅度地减小构件的截面尺寸,具有十分重要的工程应用价值

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