摘要
对钢筋混凝土梁进行了二维有限元弹性分析,采用四边形等参元推导了单元刚度矩阵的显示表达式。揭示了简支梁在均布荷载作用下的力学表现,构建相应的桁架模型。获得截面高度、跨度和正截面受弯承载力的力臂之间的关系,给出了深梁和短梁的力臂计算公式。为今后技术标准修订提供参考建议。
A two-dimensional finite element elastic analysis is carried out for reinforced concrete beams.The display expression of the element stiffness matrix is deduced by the isoparametric element of the quadrilateral.Reveal the mechanics performance under uniformly distributed loads,and the corresponding truss model is constructed.The relationship between the depth,span and the force of bending bearing capacity of the deep beams is obtained,and the calculating formulas of the arm of force of the deep flexual members are given.Provide reference suggestions for future technical standards revision.
作者
陈旭
邱志刚
魏留闯
周卫霞
熊平家
CHEN Xu;QIU Zhigang;WEI Liuchuang;ZHOU Weixia;XIONG Pingjia(School of Urban and Rural Construction and Engineering Management,Kunming University,Kunming,Yunnan 650214,China)
出处
《公路工程》
北大核心
2018年第4期44-47,104,共5页
Highway Engineering
基金
国家自然科学基金地区科学基金(51668027
51468026)
云南省教育厅科学研究基金项目(2017zzx089)
关键词
钢筋混凝土梁
桁架模型
四边形等参元
力臂
设计公式
reinforced concrete beams
truss model
quadrilateral isoperimetric element
arm of force
design formulas
