Implementation of GRDR methodology on the Quillota Bridge, Chile. A heritage review analysis
Since 2015, the Ministry of Public Works (MOP) and Pontificia Universidad Católica de Valparaíso (PUCV) have developed the regional disaster risk management (GRDR in Spanish) methodology, which considers a comprehensive protocol of inspections and activities to determine the vulnerability and hazard of infrastructure. The methodology has been applied to several routes in Chile to define a list of interventions on bridges, tunnels, pavement, and minor structures. In the case of bridges, 6,365 bridges with different typologies and materials are under the responsibility of the MOP, but none are in cities. In the framework of a specific study of PUCV on urban road bridges, the GRDR methodology has been extended to bridges under the responsibility of the city Viña del Mar. Viña del Mar is the most famous tourist location in the central zone of Chile and is close to the capital Santiago and linked to Valparaíso Port. The city is divided by the Marga Marga estuary. Originally, the city had 12 bridges, but currently, only nine of them are in service over the Marga Marga estuary. The Quillota bridge is a road bridge recognized for its high heritage value because it was the first reinforcement concrete structure built in the Valparaiso Region. For that reason, the GRDR methodology was applied. This paper presents a historical review and the heritage condition, providing the results of visual inspection (drone) and nondestructive testing applied to the Quillota Bridge. Finally, the results and analysis of the GRDR methodology are presented, including the vulnerability index of the structure, the hazard index due to extreme seismic and scouring events and a proposal intervention on the framework of its heritage condition.