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一、概述关于钢筋应变(或应力)不均匀系数ψ可用很多形式表达.早先,苏联В.И.Мурашев教授用较复杂的形式表达,这反映在苏联55年规范中.尔后有采用 f(A_g)/M~2,甚或(M_h/M)~3表达的.在这些表达式中,其首项取1,即写成ψ=1-f(x),f(x)表示某种函数.当测定M—或ε_g—曲线在裂缝后使用荷载范围内为线性的,在文献中已证明ψ只能是 M_h/M 的线性函数.1962年及1975年苏联规范都确取这一线性函数,但表达式首项并不为1,即取
I. General information on the inhomogeneity factor of steel strain (or stress) can be expressed in many forms. Earlier, Professor В. И. Мурашев of the Soviet Union expressed in a more complex form, which is reflected in the 55 year norms of the Soviet Union. Then f(A_g) is adopted. )/M~2, or even (M_h/M)~3. In these expressions, the first term is taken as 1, ie written as ψ=1-f(x), and f(x) represents a function. The determination of the M- or ε-g-curve is linear within the applied load range after cracks. It has been demonstrated in the literature that ψ can only be a linear function of M_h/M. The 1962 and 1975 Soviet regulations all determined this linear function, but The first expression of the expression is not 1, ie