预应力活性粉末混凝土简支梁受力性能试验研究

发布时间：2018-03-05 06:02

本文选题：活性粉末混凝土　切入点：受弯构件　出处：《武汉理工大学学报》2014年01期 　论文类型：期刊论文

【摘要】：通过8根梁的试验研究预应力活性粉末混凝土简支梁的正截面受弯机理。开展试块的抗压、抗折强度及弹性模量等力学性能分析,进行梁的正截面承载力计算值(试验值)与理论值的对比研究。结果表明,无粘结预应力活性粉末混凝土梁的受弯过程主要分为弹性、裂缝扩展、纤维增强和破坏4个阶段,RPC在弹性阶段发挥了一定的抗拉作用,钢纤维的阻裂增强作用延缓了裂缝的开展;提出了活性粉末混凝土梁正截面承载力的计算简图。
[Abstract]:The flexural mechanism of normal section of simply supported prestressed reactive powder concrete beams was studied through the tests of 8 beams. The mechanical properties of the specimens such as compressive strength, flexural strength and elastic modulus were analyzed. The results show that the flexural process of unbonded prestressed reactive powder concrete beams is mainly divided into elastic and crack propagation. In the elastic stage, the fiber reinforced and destroyed RPC plays a certain role in tensile resistance, and the crack resistance and enhancement of steel fiber delay the crack development, and the calculation diagram of the normal section bearing capacity of the reactive powder concrete beam is presented.
【作者单位】：桂林理工大学广西矿冶与环境科学实验中心;桂林理工大学广西岩土力学与工程重点实验室;
【基金】：国家自然科学基金(51368013) 广西科技攻关项目(桂科攻0995004) 广西岩土力学与工程重点实验室项目(11-CX-04)
【分类号】：U448.217;U441

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