Abstract: This paper not only deals with the criteria of rigid-diaphragm method for computing the lateral load distribution in straight, skew and horizontal curved bridges, but also presents formulae of calculating the influence lines of specified girder for lateral load distribution. When diaphragms are considered as to be supported on main girders with the properties of bending and torsional springs, the necessary expressions of influence lines of lateral load distributions in straight, skew and horizontal curved bridges can be obtained. Finally,a conclusion has been drawn out.

摘要： 本文除了讨论刚性横梁法在直交桥、斜交桥及平面弯桥的判别条件外,还要推导刚性横梁法在各种桥型中计算荷载横向分布影响线的计算公式。当横隔梁看成为支承于具有弯曲与扭转弹簧特性的主梁上时利用这样的力学模式,假定横隔梁受荷后其挠度线呈直线变化规律时,就不难推导出直交桥、斜交桥及平面弯桥的荷载横向分布影响线的计算公式。最后做一小结。