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为研究正弦波形波纹腹板工字型钢板梁的抗剪性能,采用ABAQUS非线性有限元程序,借助于线弹性特征值屈曲分析以及弹塑性剪切屈曲分析(考虑腹板初始缺陷的影响),将典型正弦波形波纹腹板钢板梁的抗剪强度与梯形波纹腹板钢板梁做了对比,并分析了影响正弦波形波纹腹板钢板梁抗剪强度的关键因素。数值分析结果表明,在波长与波幅不变的情形下,正弦波形的抗剪承载力低于梯形形式,在设计中应予以注意;若通过减小波长保证材料用量不变,正弦波形的抗剪承载力与梯形形式相同;正弦波形波纹钢腹板钢板梁的剪切屈曲临界应力随着腹板厚度的增加或波长的减小而显著增大,而腹板高度与波幅均没有显著影响正弦波形波纹钢腹板的剪切屈曲临界应力对初始缺陷的敏感程度。
In order to study the shear resistance of I-shaped corrugated webs with sinusoidal corrugated webs, nonlinear finite element program ABAQUS was used. With the help of elastic buckling analysis and elastic-plastic buckling analysis (considering the influence of initial web defects) The shear strength of corrugated webs with typical sinusoidal corrugated webs is compared with those of trapezoidal corrugated webs. The key factors that influence the shear strength of corrugated webs with sinusoidal corrugated webs are analyzed. The results of numerical analysis show that in the case of constant wavelength and amplitude, the shear strength of sine wave is lower than that of trapezoidal form, and attention should be paid in design. If the amount of material is reduced by reducing the wavelength, the sine wave shear resistance The bearing capacity and the trapezoidal form are the same. The critical stress of shear buckling of the corrugated steel web with sinusoidal corrugated steel web increases with the increase of the web thickness or the decrease of the wavelength, but the web height and amplitude have no significant effect on the sinusoidal waveform The sensitivity of shear stress of corrugated steel webs to initial defects.