Which structural outcome occurs on a pre-stressed concrete bridge span undergoing prolonged high-temperature exposure?

💡 Explanation

High temperatures induce creep in concrete and reduce steel tendon tensile strength; therefore, *stress relaxation* reduces the pre-stressing force, because the sustained heat causes gradual deformation, leading to decreased beam capacity, rather than improved resistance to other failures.

• Which risk increases when a fly-by-wire system's control algorithms prioritize load alleviation over immediate pilot commands?
• Which outcome results when extreme pressure spikes erode valve trim?
• Which limitation does turbine blade flutter impose on turbofan engine design?
• Which risk increases when improperly compacted concrete surrounds a vertical steel support column during construction?
• Which consequence results when a hydraulic actuator, tasked with rapidly adjusting heavy telescope mirrors for optimal observation, experiences air entrainment?
• Which consequence results when joint angle sensors fail in inverse kinematics calculation for a welding robot arm?