钢管珊瑚混凝土试验和理论研究  

Experimental and theoretical study on coral concrete filled steel tube

作　　者：王芳[1] 查晓雄[1] 

机构地区：[1]哈尔滨工业大学深圳研究生院土木与环境学院,广东深圳518055

出　　处：《建筑结构学报》2013年第S1期288-293,共6页Journal of Building Structures

摘　　要：为了探讨珊瑚混凝土应用于钢管混凝土中的可行性,研究基于氯离子腐蚀钢筋机理,通过理论分析证明,将珊瑚混凝土浇灌入钢管内能有效避免氯离子腐蚀问题。为了讨论钢管珊瑚混凝土柱的承载力性能,以珊瑚礁、砂替代混凝土中的粗、细骨料,进行了3组9根钢管珊瑚混凝土短柱轴压承载力试验,主要考察了不同产地(渤海、南海)的钢管珊瑚混凝土和钢管普通混凝土力学性能差异,试验结果表明:3组钢管珊瑚混凝土柱的荷载-位移关系曲线变化趋势基本一致,最大承载力十分接近,且珊瑚没有因产地的不同表现出较大的力学性能差异。依据试验结果和有限元模拟分析结果,给出基于普通钢管混凝土统一理论的钢管珊瑚混凝土柱承载力计算式,为钢管珊瑚混凝土应用于实际工程提供设计依据。The feasibility of using coral concrete in CFST was studied based on the reinforcement corrosion mechanism of chloride iron.The theoretical analysis shows that,filling coral concrete into the inner tube can effectively avoid the problem of corrosion of chlorine ion.In order to examine the bearing capacity of coral-CFST,using coral reefs and sand to substitute conventional coarse and fine aggregates,three groups of nine coral-CFST short columns were tested under axial compression.The tests mainly focused on the influences of coral origin(Bohai Sea,South China Sea) on the mechanical properties of coral-CFST and the difference between coral-CFST and plain CFST.The experimental results show that the load-displacement curves of the three groups of coral CFST column are basically the same with very close maximum capacities.The coral origin doesn't cause significant difference to the mechanical properties of the coral-CFST specimens.According to the test results and the finite element analysis results,the paper gives the coral-CFST capacity calculation formula based on ordinary CFST design method,which is useful to practical engineering.

关 键 词：钢管混凝土 珊瑚礁 珊瑚砂 氯离子腐蚀 静载试验 承载力 

分 类 号：TU398.9[建筑科学—结构工程]