Sensor technology (piezoelectric paint based acoustic emission sensor, bio-inspired sensor technology), smart materials (shape memory alloy-constitutive modeling of superelastic CuAlBe wires; and modeling of piezoelectric 0-3 composite), passive seismic response modification device for seismic hazard mitigation and performance based design of self-centering structural systems, system identification of nonlinear structures, shake-table test and large-scale structural testing