【作者】 宛海沫；

【导师】 顾强；

【作者基本信息】 西安建筑科技大学 ， 结构工程， 2004， 硕士

【摘要】 钢结构的梁截面多为工字型，从强度方面考虑梁腹板宜做得高而薄。为了提高腹板的临界应力，通常都设有腹板横向加劲肋，有时还在梁中段加设纵向加劲肋。目前，只有极少资料简单介绍了薄腹板梁横向加劲肋的受力及设置等问题，尚未见薄腹板梁横向加劲肋的系统研究文献。因此，实际工程设计中主要是依靠经验，所取加劲肋的刚度、截面都比较大，耗材比较多，既浪费材料，也不一定合理。本文对受多个集中荷载作用的薄腹板梁的横向加劲肋进行了研究，分析了利用腹板屈曲后强度时，横向加劲肋的受力状态、破坏机理，以及加劲肋局部承压的强度计算公式和稳定计算方法。更多还原

【Abstract】 The sections’ shape of the beam in the steel structure is mostly I. With thinking of the strength factor, it’s necessary to make the beam web high and thin. To raise the critical stress of the web, we always lay some transverse stiffeners on the web, and also lay some longitudinal stiffeners sometime. At present, there are no information or specification on studying the transverse stiffener of the thinned-web beam systemically. And there are a small few literatures related on load-bearing ability and laying of the transverse stiffeners of the thinned-web beam. Therefore the designs of stiffeners in the structures mostly depend on engineers’ experience, then lead to the using stiffeners’ stiffness and section are bigger. That make the waste of material too much and the design maybe not advisable. In this paper we study the transverse stiffeners of the thinned-web beam bearing several concentrated longitudinal strain actions. Thinking of using post-buckling strength of web plate, we study some facts about transverse stiffeners including strain ability, condition of breaking, calculation of strength and stabilization of the stiffener bearing regional load action.更多还原