Seismic Fragility Assessment for Reinforced Concrete High -Rise Buildings

A complete methodology is proposed and demonstrated, containing the key steps of the methodology and the illustration through an example of the fragility assessment of an existing 54-storey building with a dual core wall system. The set of rigorously derived probabilistic fragilities are the first published for high-rise RC buildings, thus they fill an important void in regional earthquake impact assessment in Metropolitan communities. The inelastic dynamic analyses for the fragility assessments are undertaken using a simplified lumped-parameter model that was derived from highly detailed FE models using genetic algorithms. New definitions for performance limit states are based on the results of detailed pushover analyses of a multi-resolution distributed finite element model that includes shear-flexure-axial interaction effects. To develop the fragility relationships, more than two thousand dynamic response history analyses were conducted. This study considered uncertainty in structural material values as well as in seismic demand. Thirty natural and twenty artificial strong motion records were selected for the analyses that would produce an appropriate range in structural response parameters due to variation in magnitude, distance and site condition. The overall approach is generic and can be applied to develop computationally efficient and probabilistically based seismic fragility relationships for RC high-rise buildings of different configurations.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Civil Engineering

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2015

Author dc:creator

• Ji, Jun

Contributors dc:contributor

• Elnashai, Amr S.
• Kuchma, Daniel A.

• Engineering, Civil

Language dc:language

eng

Identifier

(MiAaPQ)AAI3269926

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/83325