A STUDY ON HYSTERESIS MODELING OF REINFORCED CONCRETE COLUMNS
Journal
World Conference on Earthquake Engineering proceedings
Journal Volume
2021
Start Page
2i-0060
ISSN
30065933
Date Issued
2021
Author(s)
Ling Y.C.
Abstract
Due to the higher modes of structural response, the nonlinear time-domain dynamic analysis is considered appropriate to perform the seismic evaluation of the mid-to high-rise buildings. The analysis must accurately reflect structural members’ non-linear behaviors such as yielding strength, failure mechanism and hysteretic behavior. Columns as the major structural members in the lateral load-resisting systems. Hence, the hysteretic behavior prediction of columns is extremely importance in seismic design. In addition, there are a large amount of the reinforced concrete buildings which were built before the 1999 Chi-chi Earthquake in Taiwan. These old reinforced concrete buildings had lower seismic demands by code and were not detailed with the ductile reinforcement. Therefore, to assist the technology development for engineers on collapse prevention for the medium-to-high rise buildings in Taiwan, the proposed study aims at the development of the hysteretic models of reinforced concrete columns in different failure mode. In this study, a hysteretic model of columns and its model parameters’ formulas had been proposed based on the Pivot Hysteretic Model. A database of column specimens subject to cyclic loading has been collected from literature for the model optimization. The model optimization method was executed base on energy dissipation. Simulated annealing algorithm was used to calibrate the response with experimental results and to identify model parameters. Simultaneously, the relationship between the structural characteristics and model parameters was resolved by regression analysis, hypothesis testing and simulated annealing algorithm. The analytical results based on proposed model formulas can accurately reflect hysteretic behavior of columns such as unloading behavior and pinching effect in different failure mode.
Subjects
hysteretic behavior
pinching effect
Pivot model
reinforced concrete column
Publisher
International Association for Earthquake Engineering
Type
conference paper