i ACKNOWLEDGMENTS iii TABLE OF CONTENTS v LIST OF FIGURES vii LIST OF TABLES ix CHAPTER

A beam element for seismic damage analysis

Nonlinear Structural Analysis Towards Collapse Simulation: A Dynamical Systems Approach

The performance of different nonlinear modelling strategies to simulate the response of RC columns subjected to axial load combined with cyclic biaxial horizontal loading is compared. The models studied are classified into two categories according to the nonlinearity distribution assumed in the elements: lumped-plasticity and distributed inelasticity. For this study, results of tests on 24 columns subjected to cyclic uniaxial and biaxial lateral displacements were numerically reproduced. The analyses show that the global envelope response is satisfactorily represented with the three modelling strategies, but significant differences were found in the strength degradation for higher drift demands and energy dissipation.

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Comparative efficiency analysis of different nonlinear modelling strategies to simulate the biaxial response of RC columns

Optimal performance-based design of non-linear stochastic dynamical RC structures subject to stationary wind excitation

Simplified hysteretic model for the representation of the biaxial bending response of RC columns

The paper presents an efficient model for inelasitc biaxial bending interaction of reinforced concrete sections. Based on a rate-dependent viscoelastic equation, it is shown that the model is extremely versatile and has the capability to incorporate stiffness and strength decay. The model also enables identification of the physical nature of interaction and achieves a controlled hysteretic behavior. Only uniaxial information is required for the material parameters that describe the model. Unlike other conventional reinforced concrete models, loop tracing is necessary, thereby making it simple, efficient, and readily suitable for use with large computational models for analyzing reinforced concrete building structures. The validity of the proposed scheme is demonstrated through the analytical simulation of available biaxial experiences on reinforced concrete columns and comparison with other analytical models.

SashiI K. Kunnath

Papers

Model for inelastic biaxial bending interaction of reinforced concrete beam-columns

Seismic evaluation of reinforced concrete frame-wall buildings