Experimental design for FRP-concrete interface bond behavior under blast loads 爆炸荷载下 FRP-混凝土界面黏结性能研究试验设计

Li，Xiaoqin1; Zhang，Li1; Liao，Junzhi1; Chen，Jianfei2; Lu，Yong3; He，Yong1

2024-04-01

10.14006/j.jzjgxb.2022.0807

Jianzhu Jiegou Xuebao/Journal of Building Structures   影响因子和分区

1000-6869

To enhance the numerical simulation efficiency of FRP-concrete beam components under blast loads, a meso-scale numerical simulation scheme for FRP-concrete joints under blast is proposed. Based on the failure modes and bond-slip behavior of FRP-concrete interface for different FRP-concrete joints under various loading conditions in previous research, a modified configuration and dimension of FRP-concrete bending joint under blast is designed. The joint consists of two concrete beams with dimensions of 500 mm in length, 100 mm in width, and 150 mm in height, with a compressive strength of 54. 4 MPa. The beams are hinged at the bottom, and a GFRP plate with an elastic modulus of 30 GPa, dimensions of 450 mm in length, 100 mm in width, and 3. 0 mm in thickness, is bonded to the top surface of the concrete specimen. Employing the modified FRP-concrete bending joint, and under the condition of scaled distance Z≥1. 2 m/ kg and distance span ratio a≥0. 5, the actual stress range of the FRP at an interface debonding failure mode similar to intermediate crack-induced debonding (IC Debonding) is [180. 1, 583. 3] MPa. Pressure-impulse(P-I) curve and empirical formula of P,I, explosive equivalent weight W, explosion distance R, and scaled distance Z for the modified FRP-concrete bending joint under blast of which the length is 1. 0 m in longitudinal direction are proposed, which can be used for numerical simulation of FRP-concrete beam components under explosive loading conditions.

blast load FRP-concrete bond interface homothetic IC debonding modified bending joint pressure-impulse curve

EI

中文

其他

2-s2.0-85186710182

Scopus

1.Faculty of Civil Engineering,Kunming University of Science and Technology,Kunming,650500,China
2.Department of Ocean Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
3.Institute for Infrastructure and Environment,School of Engineering,University of Edinburgh,Edinburgh,EH93JL,United Kingdom

Li，Xiaoqin,Zhang，Li,Liao，Junzhi,等. Experimental design for FRP-concrete interface bond behavior under blast loads 爆炸荷载下 FRP-混凝土界面黏结性能研究试验设计[J]. Jianzhu Jiegou Xuebao/Journal of Building Structures,2024,45(4):226-236.

Li，Xiaoqin,Zhang，Li,Liao，Junzhi,Chen，Jianfei,Lu，Yong,&He，Yong.(2024).Experimental design for FRP-concrete interface bond behavior under blast loads 爆炸荷载下 FRP-混凝土界面黏结性能研究试验设计.Jianzhu Jiegou Xuebao/Journal of Building Structures,45(4),226-236.

Li，Xiaoqin,et al."Experimental design for FRP-concrete interface bond behavior under blast loads 爆炸荷载下 FRP-混凝土界面黏结性能研究试验设计".Jianzhu Jiegou Xuebao/Journal of Building Structures 45.4(2024):226-236.