IMPACT RESISTANCE OF REINFORCED CONCRETE FLOOR SLABS STRENGTHENED WITH FRP
Some accidental impact loads, for example blast wave loads from terrorist attacks and other acts of war, can bring serious damage and disruption to existing concrete structures. Both researchers and civil engineers around the world have been challenged to analysis and construct these structures which are capable of withstanding the impact loads. One promising approach of protecting the structures is to retrofit them with fibre reinforced polymer (FRP) composites. This paper mainly focuses on investigating the out-of-plane impact resistance of reinforced concrete (RC) floor slabs strengthened with FRP laminates, by means of finite element explicit schemes. In order to evaluate the performance of FRP-strengthening RC slabs, different categories of FRP (including carbon FRP, glass FRP, and aramid FRP), different amounts of FRP, and different retrofit schemes are studied. Meanwhile, different standoff distance is also investigated. In the finite element analysis, the dynamical effects on material strengths are considered by using dynamical increase factors, and the typical air-blast impact load is simplified as a triangular impulsive loading. It is found that the FRP-strengthening can enhance the impact resistance of the RC slabs, and the finite element model herein can provide reasonable simulations to concrete floor slabs strengthened with FRP under impact loads. The comparison of different categories of FRP shows that carbon FRP material is the most efficient, while glass FRP is the lowest.
impact resistance concrete slabs strengthening FRP finite element analysis
Han-Liang Wu Yuan-Feng Wang
School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, P.R. China School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, P.R.China
国际会议
广州
英文
351-356
2009-11-28（万方平台首次上网日期，不代表论文的发表时间）