约束效应系数对钢管砼构件力学性能影响分析

Analysis on the Influence of Restraining Effect Coefficient on the Mechanical Property of the Concrete-filled Steel Tube

约束效应系数能反映钢管砼组合构件组成成分的物理、几何特性,它不仅能反映组合构件的含钢量,而且在很大程度上体现了钢管对核心砼的约束作用。文中通过约束效应系数对钢管砼组合构件的力学性能的影响的试验研究,认为约束效应系数与构件承载力近似成线性关系,极限应变、弹性模量和变形模量、泊松比均随约束效应系数增加而增大,约束效应系数越大,组合构件在受力过程中进入塑性变形阶段越晚。

The physical and geometrical characteristics of the concrete filled steel tube can be reflected through the restraining effect coefficient.The restraining effect coefficient could reflect not only the steel content,but also externalize the confining action of the steel tube on the core concrete to some extent.Through experimental study on impact of the restraining effect coefficient on the mechanical property of the concrete filled tube,it concluded that the restraining effect coefficient and the bearing ca...