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一、前言对于超静定结构,考虑材料弹塑特性的设计方法,可以获得材料和资金的大量节约,已为多数工程技术工作者们所重视。但目前在某些工程领域的钢筋混凝土结构物的设计中,考虑弹塑性的计算方法仍较少采用。其主要原因是钢筋混凝土结构由受力开裂至破坏的过程比较复杂,与迄今为止的弹塑性计算中把材料理想化了的假设,有相当明显的不符之处,因而使得设计者不得不谨慎从事。在图1中表示了钢材和混凝土的应力应变关系,可以明显看出,它们的关系曲线有着相
I. INTRODUCTION For the statically indeterminate structure, considering the design method for the elastoplastic properties of materials, substantial savings in materials and capital can be obtained, which have been valued by most engineering and technical workers. However, at present, in the design of reinforced concrete structures in certain engineering fields, the elasto-plastic calculation methods are still rarely used. The main reason is that the process of reinforced concrete structure cracking from stress to failure is rather complicated, and the assumption that the material has been idealized in elasto-plastic calculation has obvious inconsistencies, thus making designers have to be cautious . The stress-strain relationship between steel and concrete is shown in Figure 1. It is clear that their relationship curves have a phase relationship.