论文部分内容阅读
随着基础建设的飞速发展,河砂资源短缺的矛盾日益凸显。储量丰富的海砂在力学性能方面和河砂相差不多,但海砂中的氯盐会腐蚀钢材,严重影响构件的耐久性。探讨了一种在钢管混凝土柱(CFST)中采用隔离方法合理安全应用海砂的新方法。具体做法是在钢管内壁铺设FRP薄板或FRP管。FRP材料轻质高强,耐腐蚀性能好,不仅可以有效隔离海砂中氯离子对钢管的腐蚀,并能提高构件的极限强度。主要研究了加入FRP管对钢管混凝土组合构件轴心受压力学性能的影响。通过有限元分析软件ABAQUS模拟得到了组合柱轴压极限强度随FRP管厚度,钢管厚度及屈服强度,混凝土轴心抗压强度,FRP纤维缠绕角度等因素的变化规律。
With the rapid development of infrastructure, the contradiction between the shortage of river sand resources has become increasingly prominent. The abundant sea sand has almost the same mechanical properties as river sand, but the salt of chloride in sea sand will corrode the steel and seriously affect the durability of the component. A new method of applying sea-sand reasonably and safely in the concrete-filled steel tubular column (CFST) is discussed. The specific approach is to lay FRP sheet or FRP pipe in the pipe wall. FRP lightweight and high strength materials, good corrosion resistance, not only can effectively isolate chloride ion in sea sand corrosion of steel, and can improve the ultimate strength of the components. This paper mainly studies the influence of adding FRP pipe on the axial compressive mechanical properties of CFST composite members. Through the finite element analysis software ABAQUS simulation, the ultimate strength of the composite column axial compressive strength with the FRP pipe thickness, yield strength, axial compressive strength of concrete, FRP fiber winding angle and other factors.