1. State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Jiaotong University, Xi’an 710049, People's Republic of China
2. MOE Key Laboratory for Multifunctional Materials and Structures, Xi’an Jiaotong University, Xi’an 710049, People's Republic of China
3. Department of Civil Engineering, University of Siegen, Siegen 57076, Germany