活性粉末混凝土偏压构件受力性能试验研究
发布时间：2019-03-04 20:18
【摘要】：为探讨RPC材料应用于隧道管片结构中的可行性,文章通过22根活性粉末混凝土(PRC)构件的大偏心受压试验,确定了不同截面尺寸、配筋率以及有无钢纤维条件下RPC偏心受压构件的承载特性,得到了各级荷载条件下试验柱的整个截面的应变分布特征。研究结果表明,偏心荷载作用下RPC偏心受压试件截面应变符合平截面假定,采用RPC材料制作隧道管片结构时,其厚度可有较大幅度的降低;试件截面厚度对其承载力的影响最为显著;由于RPC材料本身的抗拉、压强度较高,钢筋在RPC偏压结构中所起的作用逐渐减弱,RPC结构可适当减少其配筋量。
[Abstract]:In order to explore the feasibility of applying RPC material to tunnel segment structure, different cross-section sizes were determined by large eccentric compression test of 22 reactive powder concrete (PRC) members. The strain distribution characteristics of the whole section of the test column under various loading conditions are obtained by using the reinforcement ratio and the load bearing characteristics of the eccentrically compressed members of RPC under the condition of steel fiber or not. The results show that the cross-section strain of RPC eccentrically compressed specimen accords with the assumption of plane section under eccentric load. When RPC material is used to fabricate tunnel segment structure, the thickness of the specimen can be greatly reduced. The thickness of the specimen section has the most significant effect on its bearing capacity, because of the high compressive strength of RPC material itself, the role of steel bars in the RPC bias structure is gradually weakened, and the reinforcement quantity of RPC structure can be reduced appropriately.
【作者单位】： 中南大学土木工程学院;高速铁路建造技术国家工程实验室;
【基金】：国家重点基础研究发展计划项目(2011CB013800) 国家自然科学基金资助项目(51278494) 中铁四局计划项目
【分类号】：U451.5
[Abstract]:In order to explore the feasibility of applying RPC material to tunnel segment structure, different cross-section sizes were determined by large eccentric compression test of 22 reactive powder concrete (PRC) members. The strain distribution characteristics of the whole section of the test column under various loading conditions are obtained by using the reinforcement ratio and the load bearing characteristics of the eccentrically compressed members of RPC under the condition of steel fiber or not. The results show that the cross-section strain of RPC eccentrically compressed specimen accords with the assumption of plane section under eccentric load. When RPC material is used to fabricate tunnel segment structure, the thickness of the specimen can be greatly reduced. The thickness of the specimen section has the most significant effect on its bearing capacity, because of the high compressive strength of RPC material itself, the role of steel bars in the RPC bias structure is gradually weakened, and the reinforcement quantity of RPC structure can be reduced appropriately.
【作者单位】： 中南大学土木工程学院;高速铁路建造技术国家工程实验室;
【基金】：国家重点基础研究发展计划项目(2011CB013800) 国家自然科学基金资助项目(51278494) 中铁四局计划项目
【分类号】：U451.5
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