Prof. Fayun Liang
Prof. Liang is a professor and doctoral supervisor of Tongji University, a deputy director of Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education and Department of Geotechnical Engineering, and the winner of the Mao Yisheng Youth Award for Soil Mechanics and Geotechnical Engineering. He also serves as a director of the Foundation Branch of the Architectural Society of China and Port Engineering Branch of the China Civil Engineering Society, and an editorial board member of the Chinese Journal of Geotechnical Engineering and China Journal of Highway and Transport. Prof. Liang has chaired five projects supported by the National Natural Science Foundation of China, one sub-project of the National Key Basic Research Program (973 Program) and one sub-project of the National Key Research and Development Program. His research results have won one first prize and four second prizes of Provincial and Ministerial Science and Technology Progress Award. Beyond accomplishments in scientific research, his course was selected into the National First-class Undergraduate Courses. He was also granted the first prize of the Shanghai Teaching Achievement Award, Shanghai Municipal Award for Bringing up Talents, and Outstanding Teacher Award of Tongji University.
Title: Ground motion characteristics of the scour site and seismic performance analysis of pile-supported bridge
Abstract: This paper investigates the dynamic behavior and potential risks of the pile-supported bridge under local scour, discusses the effects of scouring on the ground motion of the site, and presents a fast calculation method for calculating ground motion. Next, a simplified model describing the bridge response is put forward, which considers the ground motion changes caused by local scour. Then the shear force at the pier bottom and pile head, and the maximum displacement of the bridge are calculated by the modal superposition method to quickly evaluate the potential damage of bridges after scour. Finally, the centrifugal shaking tests on the pile-supported bridge are conducted to verify the accuracy of this model. It is found that the site period obviously decreases under general scour and hardly changes under local scour. The motions at local scour sites are quite different from those at general scour sites, but similar to those at the original site. The bridge response calculated by this simplified method is close to the experimental results. Therefore, it's proved that the proposed model can be applied to the fast calculation of seismic response, the risk assessment of seismic hazard, and the critical scour depth under earthquakes.