Seismic Response and Safety Evaluation of Traffic Bridge for Water Intake Tower at Shenzhen Beikeng Reservoir.

The aseismic capability of the water intake tower-traffic bridge, a crucial component of the reservoir's infrastructure, is essential for ensuring the safe operation of the reservoir after an earthquake. Taking the water intake tower-traffic bridge at Shenzhen Beikeng Reservoir as an example, its seismic response was analyzed with finite element method, and its aseismic safety was evaluated. The maximum transverse displacement of the traffic bridge is 3.15 cm, and the minimum distance between adjacent decks is 2.97 cm during the design earthquake. There is no occurrence of beam dropping or collision between adjacent bridge panels. The traffic bridge experiences significant amplification of seismic accelerations in the earthquake. The maximum amplification for the bridge deck's transverse seismic acceleration is 4.01, and for the longitudinal direction, it is 3.36. During the design earthquake, the dynamic shear stress levels in the pier columns of the bridge are not high, indicating that column shear failure is unlikely. However, there are relatively high tensile stress values on the outer vertical side of the bottom of the pier columns. Additionally, the lower beams of the bridge piers exhibit high tensile stress on both the top and bottom surfaces. To ensure the seismic safety of the bridge pier structure, anti-seismic reinforcements are necessary at pier columns and beams. [ABSTRACT FROM AUTHOR]