论文部分内容阅读
单跨单层框架是框架体系中常用的一种,特别在工业建筑中应用最为普遍。这种结构的内力计算,目前有直接计算公式。但这些公式均对一种荷载作用而言,且系数较多,具体应用很不方便。本文通过简单推证,求出这类框架在任意垂直荷载作用下内力计算统一公式,并将公式中有关系数制成表格,供工程中直接查用。 1.在任意垂直荷载作用时内力公式推证推证应用弯矩分配法并按节点有线位移进行。图1(a)是结构计算简图,图1(b)是弯矩分配过程。根据迭加原理,由图1(b)得:
Single-span single-layer frames are commonly used in the framework system, especially in industrial buildings. There are currently direct calculation formulas for the internal force calculation of this structure. However, these formulae all have a large number of coefficients for a kind of load action, and the specific application is inconvenient. In this paper, a simple formula is used to determine the unified formula for calculating the internal force of any such frame under any vertical load, and the relevant coefficients in the formula are tabulated for direct use in the project. 1. In the application of any vertical load, the internal force formula is used to deduce the application of the bending moment distribution method and the wire displacement according to the node. Figure 1 (a) is a simplified structural calculation and Figure 1 (b) is a bending moment distribution process. According to the principle of superposition, from Figure 1(b):