均布与线性荷载作用下的简支T梁翼缘的有效宽度

Effective flange width of T simple-supported beam under uniform or linear load

以辛弹性力学方法为基础,将简支宽翼缘T梁翼缘部分简化为平面应力板,推导了简支T梁在满跨均布荷载与线性荷载作用下翼缘部分的有效宽度的表达式。将均布荷载下翼缘有效宽度比求解结果与英国规范BS5400中的取值进行了比较,验证了本文闭合多项式形式的有效宽度表达式的正确性。用本文方法计算T梁翼缘有效宽度简洁有效,丰富了简支T梁桥有效宽度的理论分析并简化了计算。

Simplifying the flange of T simple-supported beam as the plane stress plate,an expression in closed polynomial form was derived based on the method of symplectic elasticity for the effective width of the T simple-supported beam under uniform or linear load acting on whole span. The solution of the effective width ratio from the expression under the uniform load was compared with the data in British Standard BS5400 and the result show that the obtained expression is correct,simple and effective,enriches the theoretical analysis and simplified calculation of the effective width in the T simple-supported beam bridge.