用不同的“应力-应变”关系确定钢筋混凝土梁的解析承载能力

Y. Biks
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引用次数: 0

摘要

本文根据现行计算标准DBN B.2.6-98: 2009《混凝土与钢筋混凝土结构》,以变形法为基础,对确定钢筋混凝土梁承载能力(二次设计任务)的方法进行了对比分析。实质性的规定”。基于“应力-应变”曲线图(Bambura a.m.的非线性变形模型、Pavlikov a.m.的新变形模型、Romashko V.M.的变形-力模型)、简化的“应力-应变”双线性图(Popov v.o.、Wojciechivski O.V.)以及简化的“应力-应变”矩形图(Babayev V.M.、Bambura a.m.、Pustovoitova o.m.等)五种方法确定Mu梁弯矩最大值的结果。结果表明,根据DBN和DSTU[1,2],这些方法的承载力计算与规范的差异在1%以内。在这种情况下,根据作者的说法,从工程使用和解释实现算法的角度来看,最简单的是矩形依赖,而最复杂的是变形-力模型Romashko V.M.的方法
本文章由计算机程序翻译,如有差异,请以英文原文为准。
ANALYTICAL LOAD-BEARING CAPACITY’S DETERMINATION OF REINFORCED CONCRETE BEAMS BY DIFFERENT "STRESS-STRAIN" DEPENDENCIES
The article presents a comparative analysis of methods for determining the load-bearing capacity of reinforced concrete beams (second design task), based on the deformation approach according to current standards of calculation DBN B.2.6-98: 2009 "Concrete and reinforced concrete structures. Substantive provisions". The results of determining the maximum value of the bending moment in the Mu beam by five methods based on the use of a curvilinear diagram of "stress-strain" (nonlinear deformation model of Bambura A.M., new deformation model of Pavlikov A.M., deformation-force model Romashko V.M.), simplified bilinear diagram of "stress-strain" (Popov V.O., Wojciechivski O.V.) as well as a simplified rectangular form of «stress-strain» diagram (Babayev V.M., Bambura A.M., Pustovoitova O.M., etc.). It is shown that the calculation of bearing capacity for all these methods differs from the normative according to DBN and DSTU [1, 2] within 1%. In this case, according to the author, the simplest in terms of engineering use and interpretation of the implemented algorithm is a rectangular dependence, and the most complex is the method of deformation-force model Romashko V.M.
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