抛物线拱型竹编水泥沼气池模型内力分析

针对目前在我国滇南一带开发推广的竹编水泥沼气池，在实地测试和实验室内测试研究的基础上，将实际的几何结构简化为一类抛物线拱型结构，以此力学模型来模拟实际结构．采用力法对赘余力进行严格的数学推导，并运用自编程序针对壁厚3cm的模型进行内力分析与计算，计算结果与圆弧拱型理论分析及实测结果一致，说明所建立的理论模型和力学分析计算正确、计算程序可靠；抛物线拱型的结构性能优于圆弧拱型。

Analysis of Internal Forces of Bamboo- weaved Concrete Methane Generating Pit Models with Parabolic Arch Structure Surface

The real structure of bamboo-weaved concrete methane generating pit, which is being broadly applied in south Yunnan, P. R. China, was simplified into a kind of parabolic arch structure surface as the result of studies based on the spot test and lab test. Some detailed formulae were strictly deduced according to the principles of force method in structural mechanics. Computational programs were designed to obtain good results consistent to those calculated by theoretical models containing two cases (h=3 cm). It was indicated that the theoretical model built and the force calculation analyses were correct, the computation program was liable. It was also showed that the properties of parabolic arch structure were superior to those of ordinary round arch structure.