一、前言 众所周知,在跨越面宽的高桥中,充分利用可能的跨长和新的结构型式,是可以获得好的经济效果的。经验证明,采用斜腿刚构、斜拉桥、板桁组合结构等,都是有利于实现大跨度的力学性能较好的结构型式。 现行《桥规》对于钢结构和拱桥都明确规定宽跨比不小于1/20;然而,这个规定对其它类型桥梁是否适用,能否突破,对某些特殊结构型式(例如斜腿刚构、斜拉桥等),其计算 I. Preface As we all know, in the span of Takahashi wide, take full advantage of the possible cross-length and the new structure, you can get good economic results. Experience shows that the use of oblique rigid-frame, cable-stayed bridge, plate girder combination of structures, are conducive to achieve large-span mechanical properties better structure. The current “bridge gauge” clearly stipulates that the span ratio is not less than 1/20 for both steel structures and arch bridges; however, whether this provision is applicable to other types of bridges can make breakthroughs. For some special structural types (such as the rigid frame with inclined legs, Cable-stayed bridge, etc.), its calculation