十字交叉格构梁内力分析与优化设计

根据格构锚加固边坡工程的特点,采用Winkler弹性地基梁理论对格构梁的内力进行分析,针对目前设计中将格构梁拆分为单片梁计算的不足,讨论十字交叉格构节点处荷载分配方法,按有限长梁受多个集中力作用推导其内力公式,并编制相应计算程序。通过工程实例讨论间距、截面尺寸和悬臂长度对梁内力的影响,用于指导优化设计。计算结果表明,格构梁设计可取较小间距和较小的截面尺寸,且两端应留有一定的悬臂长度。

Analysis on internal force of lattice beam and optimization design

Based on the analysis of characteristic of lattice beam and cable engineering,the internal force of lattice beam is computed by Winkler elastic foundation beam theory,the method of assign load in the decussating node is discussed to overcome the disadvantages of present method,and the formula of internal force of the beam with finite distance is conducted.The space,section dimension and cantilever length are discussed via a project to guide optimization design.The results show that the design of lattice beam ought to use small space,less section dimension and the lattice beam should have appropriate cantilever length.