轴向荷载下混凝土受压构件塑性内力研究  

Research on the plastic internal forces of concrete compressive members under axial loads

作　　者：王恒昆 赵倩 WANG Hengkun;ZHAO Qian(Shandong Transportation Institute,Shandong Jinan 250031 China;Jinan City Ecological Environmental Protection Comprehensive Administrative Law Enforcement Detachment Jiyang brigade,Shandong Jinan 251400 China)

机构地区：[1]山东省交通科学研究院,山东济南250031 [2]济南市生态环境保护综合行政执法支队济阳大队,山东济南251400

出　　处：《山东交通科技》2024年第4期42-44,48,共4页

摘　　要：混凝土结构设计中常采用弹性内力作为设计依据,但由于混凝土受压构件具有非线性性质,导致超静定结构内力计算结果存在误差。通过对钢筋混凝土受压构件在跨中区域轴向力作用下的弹塑性加载情况分析,研究钢筋混凝土受压构件各受力阶段的内力结果差异。算例结果表明,传统结构力学方法计算的内力和配筋与考虑弹塑性计算的结果差异很大,其中最大内力误差将近8倍。Elastic internal forces are often used as the design basis in the design of concrete structures,but due to the nonlinear nature of concrete compression members,it leads to errors in the calculation results of internal forces of superstatic structures.In this paper,the differences in the internal force results of reinforced concrete compression members at various stress stages are investigated by analysing the elastic-plastic loading of reinforced concrete compression members under the axial force in the mid-span region.The calculation results show that the internal forces and reinforcements calculated by the traditional structural mechanics methods differ significantly from the results calculated by considering elastic-plastic,in which the maximum internal force error is nearly eight times.

关 键 词：钢筋混凝土 轴向力 弹塑性 内力分析 

分 类 号：TU375[建筑科学—结构工程]