摘要
本文对国内外现有计算理论和公式的实质进行了分析.提出把钢管混凝土视为一种新的组合材料进行研究的新概念.在正确选定钢管和核心混凝土本构关系的基础上,首次导出了组合材料轴心受力时本构关系全过程.得到组合材料的物理力学性能指标:屈服点、弹性模量、切线模量和强化模量等.按照构件的几何参数:面积、惯性矩、截面抵抗矩和截面回转半径等,即可导出各种构件的计算公式.形成了以本构关系为基础的一整套具有一定理论基础的计算体系,为研究钢管混凝土结构开创了一种新途径.
The Substance of calculating theoreies and formulas at home and abroad is ana-lysed in this paper.Advance a new conception to research the concrete filled steeltube as a composite meterial.On the base of the correctly selected constitutive rela-tionships of steel tube and core concrete,the full constitutive relationship of compo- site material under axial load(compression and tension)has been derived.And ob-tained a series of physical mechanical characters,such as:yield point,elasticmodulus,tangent modulus and strengthening modulus.By using geometry charac-ters of members,such as:area,moment inertia of cross section,section module andradius of gyration,the calculation formulas of members can be derived.Formed anew theoretical calculation system on the basis of constitutive relationship.It initi-ates a new way to research the concrete filled steel tubular structures.
基金
国家自然科学基金
关键词
钢管混凝土
结构
concrete filled steel tube
full contitutive relationship
