张弦木梁刚度分析

Analysis on Stiffness of Timber Beam String Structure

对木梁进行张弦是解决大跨木梁挠度过大的一个有效方法,它比同截面普通木梁的刚度有了较大的提高.该文用1∶2比例的模型试验,在对张弦木梁变形性能试验及理论分析的基础上,用有限元法对其刚度及影响因素进行分析,从而验证了试验及理论分析结果.

It is an effective method to reduce the large deflection of long-span timber beam by tensioning steel string in the timber beam,which makes the stiffness of timber beam string structure（TBSS） to be greatly enhanced than that of the common timber beam in the same cross section.Model test with the scale of 1∶2 is conducted,and on the basis of theoretical analysis on experiment results of deformation characteristic of TBSS,stiffness and the factors affecting it are analyzed by using of finite element method,thus experimental and theoretical results of TBSS are verified.