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对U形截面梁进行了抗弯试验,并在第一部分试验性研究[Pastor MM,Roure F.Open cross-section beams under pure bending.Ⅰ.Experimental investigations.Thin-Walled Struct 2008; 46(5):476-483.]中,建立了数值分析模型。分析模拟了实际的试验条件和纯弯作用下塑性铰的产生,同时得到了截面的弯矩-转角曲线和加载过程中梁的应力应变信息。模型经证实有效后,对U形截面进行了参数分析。分析了影响截面极限抗弯强度的数个参数:厚度t、宽度b、深度cw和加载位置y。
Bending tests on U-section beams were carried out and in the first part of a pilot study [Pastor MM, Roure F. Open cross-section beams under pure bending. I. Experimental investigations. Hin- Walled Struct 2008; 46 (5): 476-483.], Established a numerical analysis model. The actual experimental conditions and the plastic hinges under pure bending were simulated and analyzed. The bending moment-corner curves and the stress-strain information of the beam during the loading process were also obtained. After the model is validated, the parameters of the U-shaped section are analyzed. Several parameters affecting the ultimate flexural strength of the section were analyzed: thickness t, width b, depth cw and loading position y.