Ultra high performance concrete and C-FRP tension Re-bars: A unique combinations of materials for slabs subjected to low-velocity drop impact loading

被引:17
作者
Anas, S. M. [1 ]
Alam, Mehtab [2 ]
Isleem, Haytham F. [3 ]
Najm, Hadee Mohammed [4 ]
Sabri, Mohanad Muayad Sabri [5 ]
机构
[1] Jamia Millia Islamia, Fac Engn & Technol, Dept Civil Engn, Delhi, India
[2] Netaji Subhas Univ Technol, Dept Civil Engn, Delhi, India
[3] Qujing Normal Univ, Dept Construct Management, Qujing, Yunnan, Peoples R China
[4] Aligarh Muslim Univ, Zakir Husain Engn Coll, Dept Civil Engn, Aligarh, India
[5] Peter Great St Petersburg Polytech Univ, St Petersburg, Russia
关键词
RC slabs; impact loading; strain-rates; UHPC; SFR-UHPC; CFRP; dynamic response; damage; REINFORCED-CONCRETE; NUMERICAL-SIMULATION; MECHANICAL-PROPERTIES; FAILURE MODES; HIGH-STRENGTH; MASONRY WALL; STEEL; BEHAVIOR; BEAMS; PREDICTION;
D O I
10.3389/fmats.2022.1061297
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In this research work, different combinations of normal strength concrete (NSC), ultra-high-performance concrete (UHPC), and steel fiber-reinforced UHPC (SFR-UHPC) concrete with re-bars of conventional steel and of carbon fiber-reinforced polymer (C-FRP) are used in a two-way square slab of size 1000mm x 1000mm x 75mm subjected to 2500 mm free-fall impact loading. Experimental arrangement consisting of 105 kg dropping weight with the circular flat impacting face of 40 mm diameter used for carrying out impact test is modeled using a high-fidelity physics-based finite element computer code, ABAQUS/Explicit-v.6.15. After validating the experimental results of the NSC slab with steel bars, analyses are extended by replacing NSC and steel bars with UHPC/SFR-UHPC and C-FRP bars, respectively, under the same dropping weight. Only the remote face (tension face) of the slabs is provided with the re-bars. Widely employed and available with the ABAQUS, the Concrete Damage Plasticity model with strain-rate effects has been entrusted for simulating the concrete plastic response. Re-bars of steel are idealized with the Johnson-Cook plasticity damage model. C-FRP re-bars are defined with the classical plasticity model following the elastic-plastic constitutive laws. The impact responses of the slabs consisting of NSC/UHPC/SFR-UHPC concrete with re-bars of steel, and C-FRP combinations considered are discussed and compared. Slabs made of UHPC/SFR-UHPC concrete with the C-FRP re-bars are found to offer a promising combination of materials to withstand low-velocity impact load with little damage and extraordinary impact performance.
引用
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页数:18
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