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中小跨度拱式桥涵、渡槽及大跨度空腹拱的复拱,一般采用等截面圆弧无铰实腹拱。其内力计算通常采用交通部公路设计院《拱桥设计计算手册》法(以下简称《手册》)。该法提供了不少数表,省略了结构力学中复杂的变位计算,比理论方法简单了许多。但是,具体演算过程仍有许多不便,从m系数、i~2/L~2二值(m为“拱轴线”系数,即
Small and medium-span arch bridges and culverts, aqueducts and long-span fast-arch complex arch, the general cross-section arc with no hinge real abdominal arch. The internal force calculation is usually used by the Ministry of Transportation Highway Design Institute “Arch Bridge Design Calculation Manual” Law (hereinafter referred to as “Manual”). The method provides a number of tables, omits the complex calculation of displacement in structural mechanics, much simpler than the theoretical method. However, there are still many inconveniences in the specific calculation process. From the m coefficient, i ~ 2 / L ~ 2 binary value (m is the “arch axis” coefficient, that is