全波纹腹板H型钢门式刚架的内力分析

全波纹腹板H型钢在一定程度上缓解了腹板薄壁化与稳定性之间的矛盾.运用变截面梁单元有限元法和MATLAB高级编程语言分析了波幅与波纹改变时对全波纹腹板变截面门式刚架的内力与柱顶水平位移的影响.通过分析可知,随着波幅的增大刚架柱顶水平位移在减小,随着波长的增大刚架柱顶水平位移在增大,但波幅与波纹的改变对刚架的内力影响不明显;并与等截面门式刚架进行对比,用实例说明了全波纹腹板H型钢门式刚架柱顶水平位移较小的优越性.这为全波纹腹板H型钢在工程中的应用提供了理论依据.

Elastave bucking of whole-corrugate web H-beam

Contradiction between thin wall and stability of H-beam is lightened by whole-corrugated web H-beam to some extent.This paper introduces the use of finite-element method of non-uniform beam and high programming language of MATLAB to analyze effect of the changing of corrugation and wave amplitude to internal force and horizon displacement of whole-corrugated web nonuniform section portal frame.Through analysis,with increasing of wave amplitude the horizon displacement diminish;with wave length increase the horizontal displacement is enlarged,but the changing of wave amplitude and corrugation has no obvious effect on internal force of steel frame.And contrast to constant cross-section H-beam,declaration superiority of whole-corrugated web H-steel portal with example,supply theory to this kind of H-beam in engineering applies.