Seismic retrofit schemes for RC structures and local‐global consequences

TLDR

The paper adopts a consequence‑based engineering framework that addresses expected damage only when it exceeds acceptable limits and iteratively reassesses until community objectives are met. The study reviews repair schemes for reinforced concrete frame buildings, aiming to evaluate their impact on seismic response parameters and guide decision‑making for intervention objectives. Local and global intervention measures, including foundation system actions, are discussed with technological details, and their qualitative effects on member, sub‑assembly, and system performance are assessed. Repair methods are found to influence stiffness, strength, and ductility, providing a global assessment that assists researchers and practitioners in meeting intervention goals.

Abstract

Abstract A review of repair schemes for reinforced concrete frame buildings is presented in this paper, within the context of global objectives of the intervention process. Local as well as global intervention measures are discussed and their technological application details outlined. The effect of the reviewed repair schemes on the member, sub‐assemblage and system performance are qualitatively assessed. The important role of the foundation system in the rehabilitation process is outlined and measures that are consistent with the super‐structure intervention methods are given. The paper concludes with a global assessment of the effect of repair methods on stiffness, strength and ductility, the three most important seismic response parameters, to assist researchers and practitioners in decision‐making to satisfy their respective intervention objectives. The framework for the paper complies with the requirements of consequence‐based Engineering, where the expected damage is addressed only when consequences are higher than acceptable consequences, and a cyclical process of assessment and re‐assessment is undertaken until the community objectives are deemed to be satisfied.