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| 任意截面钢筋混凝土构件容许应力法配筋数值解法
摘要：本文针对铁路桥梁任意截面钢筋混凝土构件容许应力法配筋问题，以格林公式为基础，将截面轮廓转换为多段线或圆弧，导出了任意截面特性数值计算公式。对截面零应力线即开裂后截面受压、受拉区分界线迭代计算进行了简化，将对斜率k和与x轴交点b两个参数的二元非线性方程简化为对b值的一元非线性方程，采用不动点迭代法进行计算，大大提高了求解效率。运用本文方法编写了任意截面钢筋混凝土构件容许应力法配筋程序。计算结果表明，本文方法对解决任意截面钢筋混凝土构件容许应力法配筋计算问题稳定、快捷、可靠。
关键词：任意截面；容许应力法；配筋
Abstract: Aiming at the problem of computing reinforcing for reinforced concrete members with arbitrary sections of railway bridges, based on Green's formula, the numerical calculation formula for the characteristics of arbitrary sections is derived. This paper simplifies the iterative calculation of the zero stress line of the section, which greatly improves the efficiency of solution. The program based on the theory in this paper shows that this method is fast and reliable in solving the problem of computing reinforcing.
key words：arbitrary reinforced concrete sections, allowable stress design method, computing reinforcing
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