Quasi-Static Testing of Posttensioned Nonemulative Column-Footing Connections for Bridge Piers

摘要

Accelerated bridge construction (ABC) is gaining popularity because it offers a number of advantages over conventional methods of construction. Prefabrication of bridge components for rapid on-site assembly is a highly effective ABC approach. Bridge substructures are traditionally cast in place with columns that form plastic hinges during earthquake events. Recent studies have explored new precast column-footing connections that either emulate the seismic performance of monolithic construction (emulative) or show improved seismic performance with the use of rocking connections (nonemulative). This paper presents findings from half-scale experimental testing of one emulative and two nonemulative precast column-footing connections. The two nonemulative connections were designed and detailed to sustain limited damage that can be rapidly and cost-effectively repaired using predefined methodologies. The tested connections showed promising results for use in regions of moderate to high seismicity; however, further developments of the proposed construction and repair methodologies are required for their full potential to be realized. (C) 2016 American Society of Civil Engineers.