Anjiazhuang Grand Bridge

The Anjiazhuang Grand Bridge is situated in Anjiazhuang Village, Wangping Town, Mentougou District, Beijing Municipality. It serves as a critical control project for the New National Highway 109 Expressway. The bridge features an asymmetric structural design for its left and right decks. The left deck is a double main truss steel truss cable-stayed bridge with variable bottom height with a main span of 249 meters; the right deck is a continuous double main truss steel truss girder bridge with variable bottom height with a total length of 342 meters, spanning the Fengsha Railway, Yongding River and National Highway 109 in a continuous stretch.

The entire bridge was closed in April 2025, with 4 sets of viscous dampers applied. The model and parameters are as follows: