Abstract:

This presentation briefly summarizes the development of confined concrete filled tubes (CCFT). Recent study on impact load behavior of concrete filled tubes (CFT) and confined concrete filled steel tubes (CCFT) investigated using a high-speed gas gun is discussed in details. Experimental parameters included the confinement details and impact speed. Dynamic strains and the failure patterns are discussed. The test results demonstrate the effectiveness of lateral confinement to improve the dynamic impact behavior of CFT columns. Comparisons were also made between the test results and the analytical results using LS-Dyna. The trend of the stress wave propagation in the CFT specimen was reasonably well predicted.

Biography:

Dr. Yan Xiao is an associate professor of civil engineering at the University of Southern California. Dr. Xiao's research interests include earthquake resistant design of structures, structural concrete, steel, hybrid or composite systems, and structural materials. He is an associate editor for the Journal of Structural Engineering, American Society of Civil Engineering (ASCE). His other professional activities include serving as the Central Committee Member of the Association for International Cooperation and Research in Steel Concrete Composite Structures (ASCCS), and members of several ASCE and ACI technical committees. He is awarded with the Cheug Kong Scholarship from the Ministry of Education of China and the Hunan University of China. He is also serving as the supervisory dean of the Civil Engineering College at the Hunan University.

He has more than 100 technical publications including 30 refereed journal papers, one book chapter and one edited proceedings book. Dr. Xiao received his bachelor of engineering degree from the Tianjin University, China, in 1982, his master of engineering degree and doctor of engineering degree from the Kyushu University, Japan, in 1986 and 1989, respectively. Prior to joining the faculty of the University of Southern California, he worked as a research engineer at Aoki Corp., Tokyo, Japan for one year and the University of California at San Diego for four years.