His research doctorate was on the seismic capacity assessment of irregular structures using adaptive pushover procedures. He investigates the response of complex networks and structures under extreme loading conditions. He has also undertaken many studies on the safety assessment of structures and evaluation of post-earthquake failures. Specifically, he works on nonlinear inelastic dynamic response simulation for infrastructures. His recent research includes seismic performance assessment of a nuclear reactor building under multiple earthquake excitations considering the degradation effects.