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Advances in Materials Science and Engineering
Volume 2016 (2016), Article ID 3696418, 10 pages
http://dx.doi.org/10.1155/2016/3696418
Research Article

Control Parametric Analysis on Improving Park Restoring Force Model and Damage Evaluation of High-Strength Structure

1School of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai 200092, China
2Bolina Ingegneria SR., Mestre, 30173 Venice, Italy

Received 1 May 2016; Revised 9 July 2016; Accepted 11 July 2016

Academic Editor: Antônio G. de Lima

Copyright © 2016 Huang-bin Lin et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

In the dynamic time-history analysis of structural elastoplasticity, it is important to develop a universal mathematical model that can describe the force-displacement characteristics for restoring force. By defining three control parameters (stiffness degradation, slip closure , energy degradation ), the Park restoring force mathematical model can simulate various components. In this study, the Park restoring force has been improved by adding two control parameters (energy-based strength degradation and ductility-based strength degradation ). Based on the testing data, the constitutive model is input and 55 numerical models are developed to analyze the effects of various parameters on structural behavior. Conclusion. (1) has determinative effect on structural behavior; the effect of is basically consistent with that of ; has significant effect on shear forces and bending moments; has significant effect on displacements and accelerations; has significant effect on shearing forces, acceleration, and total energy consumptions. (2) Based on the classification of four types of damage level, the recommended values for , , , , and are presented. (3) Based on the testing data of high-strength columns, the recommended values for the five control parameters of the improved Park restoring force model are presented.