The BSDS Design Guide Manual addresses seismic design for conventional new bridges under what hazard scenario?

• A. Floods
• B. Large earthquakes
• C. Hurricanes
• D. Tsunamis

Answer: (B)

The main idea is designing bridges to withstand strong ground motion from large earthquakes. In the BSDS Design Guide, the seismic provisions are about how conventional new bridges respond to significant earthquake shaking, ensuring adequate strength, ductility, and redundancy so the structure doesn’t collapse and remains serviceable after a major event. This focus on large earthquakes means the guide addresses inertial forces and dynamic effects caused by strong seismic ground motion, rather than other hazards. Other scenarios like floods, winds from hurricanes, or tsunami loading involve different loads and design criteria, which are handled by separate guidelines or specialists. So the hazard scenario the BSDS Design Guide tackles for conventional new bridges is large earthquakes.