新的kh0-法计算双筋梁
, PP. 0-192
Keywords: A,new,method,for,calculation,of,doubly,reinforced,concrete,beams,and,some,related,examples,are,introduced.,The,calculation,based,on,the,same,stress,distribution,in,compression,zone,is,derived,from,the,method,of,computing,singly,reinforced,beams.,The,calculation,formulas,are,simple,and,similar,to,those,of,the,singly,reinforced,concrete,beams.,It,is,not,necessary,to,divide,bending,moment,into,two,parts,one,related,to,concrete,compression,force,and,another,to,compressive,reinforcement.,The,total,amount,of,tensile,reinforcement,can,be,directly,determined.,The,case,of,over,reinforced,section,can,not,occur,if,the,calculation,is,done,with,the,design,tables,prepared,in,this,paper.,A,check,of,the,maximal,height,of,compression,zone,is,not,necessary.,The,strains,of,tensile,and,compressive,steel,bars,are,both,larger,than,their,elastic,limits.
Abstract:
介绍一新的钢筋混凝土双筋梁的计算方法和算例，该法是在单筋梁的计算公式基础上推导而得。受压区混凝土压应力分布仍然采用矩形加抛物线。计算公式形式与单筋梁的相同，简洁明了。在计算钢筋面积时，无须将弯矩分解成两部分，即混凝土受压合力与对应的钢筋拉力组成的力偶矩和受压钢筋与对应的受拉钢筋组成的另一个力偶矩。受拉钢筋总面积可直接求得。在事先制成的计算表格中已自动排除了超筋，即无须验算受压区的最大高度，受拉和受压钢筋的应变均能大于其屈服应变。
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