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采用弯梁桥与直梁桥的边中跨比的类比方法,根据已建直线部分斜拉桥的边中跨比,类比出曲线部分斜拉桥合理的边中跨比,其适用的边中跨比范围在0.5～0.6左右。通过对我国已建部分斜拉桥相关参数的统计并与日本规范进行对比,对曲线部分斜拉桥适宜的主梁高度进行了分析,得到了变截面梁曲线部分斜拉桥适宜的梁高取值范围。通过调查,对变截面曲线部分斜拉桥合理的梁底曲线进行了分析,建议曲线部分斜拉桥跨径小于200 m时采用2次抛物线,大于200 m时采用1.8次曲线。
Based on the method of analogy between side span of curved girder bridge and straight girder bridge, according to the side-to-center span ratio of built-up straight cable-stayed bridge, the reasonable aspect ratio of cable- Span than the range of 0.5 to 0.6 or so. By comparing the statistics of some parameters of the existing cable-stayed bridges in our country with those of Japan, the suitable height of the main girders of the cable-stayed bridges in the curves is analyzed. The suitable beam height of the cable-stayed bridges with varying cross-section beams is obtained Value range. Through the investigation, the reasonable beam bottom curve of the cable-stayed bridge with variable cross-section curve is analyzed. It is suggested that the second-order parabola should be adopted when the span of cable-stayed bridge is less than 200 m in the curve part, and 1.8 times when the cable-stayed bridge is larger than 200 m.