1. Advanced Materials and Structures Laboratory, VNU Hanoi, University of Engineering and Technology (UET), Hanoi 100000, Vietnam
2. NTT Institute of High Technology, Nguyen Tat Thanh University, Disctric 4, Ho Chi Minh City, Vietnam
3. Department of Civil and Environmental Engineering, Sejong University, 98 Gunja Dong, Gwangjin Gu, Seoul 143-747, South Korea