波浪腹板受弯构件设计理论及试验研究

波浪腹板工形构件由翼缘与波浪腹板通过高频焊接组成,作为受弯构件具有较高的承载效率。基于波浪腹板工形构件截面承载力的简化模型,提出波浪腹板受弯构件强度和抗剪稳定承载力计算公式,同时亦给出考虑波浪腹板剪切变形的构件挠度计算方法;对2根足尺的波浪腹板工形截面梁进行面内加载试验,揭示受弯构件加载破坏过程及破坏机理;同时以有限元分析进行佐证,分析构件初始缺陷对其破坏形式的影响。研究表明,试验结果与有限元分析结果吻合较好,亦验证建议设计方法的合理性。

THEORETICAL AND EXPERIMENTAL STUDY ON THE FLEXURAL MEMBER WITH SINUSOIDAL CORRUGATED WEB

Sinusoidal corrugated web H-shaped members are composed of flanges and sinusoidal webs,and it has a higher load-carrying efficiency than flat web especially as a beam.Based on the section simplified model of the sinusoidal corrugated web,the bend-carrying capacity and the shearing stability capacity of the sinusoidal corrugated web beams were proposed.Formula of beam deflection which considers the shearing deformation of sinusoidal corrugated web was also presented.Two full scale tests of sinusoidal web members under bending were carried out,and loading process and failure mechanism of the beam were shown.Finite element analysis was used to certify the test results,and the initial defect of members was also considered.It concludes that all of the test results went well with the FEA results,and both of them had confirmed the rationality of the proposed formula mentioned above.