Design and Analysis of a Partially Cable-stayed Bridge over the Mingyue Qujiang River in Guang'an

Abstract

The long bridge over the Mingyue Qujiang River in Guang'an, Sichuan, China is a prestressed concrete partially cable-stayed bridge with a main bridge span arrangement of (110+210+110) m constructed with a pier-girder-tower fixed system. The girder features a single-box three-chamber section, measuring a width of 23 m, a height of 7.5 m at the main pier top, and a height of 1.6 m at mid-span. The girder is reinforced with prestressed steel bars in three directions and constructed using the cast-in-place cantilever method. The main tower is a reinforced concrete structure with a rectangular cross-section and a height of 32.05 m. The bridge has a total of 56 pairs of stay cables in a single plane. Sleeve cable saddles are adopted with two-way anti-slip keys arranged on both sides of tower wall. The findings in this study serve as a reference for the design of similar projects in the future.