1. PhD Candidate, Civil Engineering Dept., School of Engineering, Shiraz Univ., Shiraz, Fars 7134851156, Iran.
2. Assistant Professor, Civil Engineering Dept., School of Engineering, Shiraz Univ., Shiraz, Fars 7134851156, Iran.
3. Assistant Professor, Dept. of Mechanical Engineering, School of Engineering, Shiraz Univ., Shiraz, Fars 7134851156, Iran.
4. Professor, Dept. of Civil Engineering, Keio Univ., Tokyo, Japan.