报告题目：On Finite Element Modeling of Shear Behavior of Concrete Beam
报告人：Shi Tiansheng 博士
地点：腾讯会议，会议号977 998 151
The shear of concrete beam is a very old problem and researchers are studying this problem in different way. Here we study the shear problem of concrete beam extensively with finite element method and explore whether this problem could be solved with the conventional finite element method. A summary of the result is presented, which shows that finite element method is indeed a useful tool to solve such problem.
Dr. Tiansheng Shi is currently a research associate fellow of the College of Civil and Transportation Engineering, joined SZU in March 2019. He received his B.Eng from Southeast University (SEU), Nanjing, China and his Ph.D in Civil Engineering from the Hong Kong University of Science and Technology (HKUST), Hong Kong, China.
His research interests primarily include simulation of concrete structure with FE method, fiber reinforced cementitious composite, multiple cracking theory.
报告题目：Shear Behavior of RC Beams with Corroded Stirrups Strengthened Using FRP Laminates: Effect of the Shear Span-to-Depth Ratio
报告人：Yang Xu 博士
地点：腾讯会议，会议号977 998 151
Externally bonded reinforcement fiber-reinforced polymer (EBR FRP) laminates have been used around the world for the shear strengthening of reinforced concrete (RC) beams with corroded stirrups. The shear span/depth ratio (av/d) can significantly influence the behavior of an RC beam shear strengthened with EBR FRP composites and can even determine the shear failure mode of RC beams. Therefore, 18 RC beams were constructed and tested in this study to analyze the effect of the av/d ratio on the performance of RC beams with corroded stirrups strengthened in shear with U-wrapped carbon fiber-reinforced polymer (CFRP) strips. The investigated parameters included three stirrup corrosion levels (0%, 5% and 15%) and different shear span/depth ratios (av/d=1.0, 2.0 and 3.0). The test results indicated that the high corrosion level of the stirrups significantly decreased the shear capacity of both the strengthened and unstrengthened beams. The experimental results were compared with those of established models provided in the literature. The design formulation was conservative for both the unstrengthened and strengthened beams with different stirrup corrosion levels.
Dr. Yang Xu is currently a research associate fellow of the College of Civil and Transportation Engineering, joined SZU in September 2018. He received his B.Eng in Civil Engineering from Central South University, Changsha, China and his Ph.D in Civil Engineering from Tongji University.
His research interests primarily include FRP grid reinforcing ECC matrix composite layer strengthening RC structures, shear behavior of FRP composites reinforced concrete beams, and FRP laminates shear strengthening RC beams.