连续斜梁桥受竖向荷载时的内力近似计算

Approximate Calculation of Internal Force for Continuous Skew Beam Bridges Under Vertical Loads

应用斜梁桥与正梁桥之间夹角的余弦关系 ,找到了一种求解连续斜梁桥赘余未知力的近似方法。它把一个连续斜梁桥的力学问题转化为连续正梁桥的力学问题。通过几个算例的验证 ,其计算结果不但具有较高的精度 ,而且其计算过程可以应用一般平面杆系有限元法的计算程序来完成。因此 。

By using the cosine relation of angle between the skew and straight beam bridges, the approximate method for solution of surplus unknow forces of continuoud skew beam bridge is obtained. It transformed the mechanic problem from the continuous skew beam bridge into the continuous straight beam bridge.This method is proved by analysis of some examples, the results not only have the higher precision ,but complete the calculation process with the aid of common plane finit element computer program. Therefore it is very conveniently for disigners.