斜简支梁桥支点剪力计算方法的研究

以某斜简支T 形梁桥为研究对象，通过建立空间力学模型，分析了不同斜度下斜梁桥的荷载传递机理，并计算和比较了由汽车荷载所引起的正交桥与斜桥的支点剪力，指出杠杆原理法在斜梁桥内力计算中的局限性.为优化斜梁桥在汽车荷载下支点剪力的计算方法，提出混合影响线法并明确了斜梁桥通过混合影响线法计算支点剪力的具体步骤. 通过该方法计算得到的斜梁桥内力结果与模型计算结果相符，且该方法理论明确，计算简，可应用于工程实际.
For a skew T-beam supported simply bridge, the space mechanics model established to calculate and compare the shearing force caused by vehicle load, and analyze the load transfer mechanism of skew beam bridge with different angles. The limitations of lever principle method is indicated. In order to optimize the traditional calculation method for shearing force, the mixed influence line method is proposed and the procedure of this method is cleared. The results obtained with mixed influence line method agree with the theoretical model value, and this method is practical.