Hysteretic behavior of UHPC beam-column joints after fire exposure
Source abstract
Abstract
Joints are critical parts of structural members. In order to study the mechanical properties of beam-column joints improved by using UHPC after fire exposure, a series of tests have been conducted on reinforced concrete beam-column joints, with both conventional concrete and UHPC in the joint. Fire exposure tests were carried out on the specimens in the light of the designated heating curve, then followed by quasi-static loading tests. Measurements were respectively made on the temperature and load-displacement of the joints. Several significant parameters were analysed from the results of the loading tests, such as pinching width ratio, displacement ductility factor, energy dissipation, stiffness degradation and equivalent hysteretic damping ratio. The results show that high temperatures have a significant effect on the ultimate strength and initial stiffness of concrete beam-column joint specimens. The application of UHPC significantly improves the mechanical behaviour of beam-column joints. In addition, the energy-consuming capacity is enhanced. After fire exposure, the loading capacity of UHPC specimens is reduced correspondingly.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Fire effects on concrete materials · Structural Behavior of Reinforced Concrete · Structural Response to Dynamic Loads
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (32)
Show source-provided references
1. Optimization of ultra-high-performance concrete by the use of a packing model10.1016/0008-8846(94)90022-1 ↗
2. High performance concrete: a material with a large potential10.3151/jact.7.145 ↗
3. Graybeal · 2005
4. Innovative design approach of precast-prestressed girder bridges using ultra high performance concrete10.1139/L09-169 ↗
5. Seismic response of UltraHigh performance concrete-filled FRP tube columns10.1080/13632469.2012.713560 ↗
6. Blast testing of ultra-high performance fibre and FRP-retrofitted concrete slabs10.1016/j.engstruct.2009.03.020 ↗
7. Structural performance of ultra-high-performance fiber- reinforced concrete beams10.1002/suco.201600006 ↗
8. Size effect of ultra-high performance fiber-reinforced concrete composite beams in shear
9. Damage assessment and repair design and implementation for underpass bridge based on fire effects10.4028/www.scientific.net/AMM.226-228.1674 ↗
10. A case study on the fire damage of the underground box structures and its repair works
11. Fast assessing spalling risk of tunnel linings under RABT fire: from a coupled thermo-hydro-chemo-mechanical model towards an estimation method10.1016/j.engstruct.2017.03.068 ↗
12. Fire resistance and spalling performance of confined concrete columns10.1016/j.conbuildmat.2017.08.167 ↗
13. Fire tests on full-scale FRP reinforced concrete slabs10.1016/j.compstruct.2017.07.060 ↗
14. Large-scale test as the basis of investigating the fire-resistance of underground RC substructures10.1016/j.engstruct.2018.09.083 ↗
15. Mechanical behaviour of ultra-high strength concrete at elevated temperatures and fire resistance of ultra-high strength concrete filled steel tubes10.1016/j.matdes.2016.05.050 ↗
16. High-strength concrete exterior beam-column joints with high-yield strength steel reinforcements10.1016/j.engstruct.2017.05.024 ↗
17. Seismic retrofit schemes with FRP for deficient RC beam-column joints: state-of-the-art review10.1061/(ASCE)CC.1943-5614.0000950 ↗
18. Seismic retrofit of reinforced concrete strong beam–weak column joints using EBROG method combined with CFRP anchorage system10.1016/j.engstruct.2019.05.070 ↗
19. Effect of lateral beam on the seismic behavior of corner RC beam–column joints under cyclic reversal loading
20. 3D beam–column corner joints retrofitted with X-shaped FRP sheets attached via the EBROG technique10.1016/j.engstruct.2019.01.038 ↗
21. Shear retrofitting of corner 3D-reinforced concrete beam-column joints using externally bonded CFRP reinforcement on grooves10.1061/(ASCE)CC.1943-5614.0000862 ↗
22. Estimating the seismic performance of CFRP-retrofitted RC beam-column connections using fiber-section analysis10.1080/13632469.2016.1269696 ↗
23. Effects of high-strength reinforcing bars and concrete on seismic behavior of RC beam-column joints10.1016/j.engstruct.2019.01.019 ↗
24. Effects of self-healing on tensile behavior and air permeability of high strain hardening UHPC10.1016/j.conbuildmat.2019.01.193 ↗
25. 2002
26. Experimental study on seismic performance of post-fire reinforced concrete frames10.1016/j.engstruct.2018.10.080 ↗
27. Post-heating response of concrete-filled steel tubular columns under sustained loads10.1016/j.istruc.2019.04.003 ↗
28. Experimental investigation of the efficacy of EBROG method in seismic rehabilitation of deficient reinforced concrete beam–column joints using CFRP sheets10.1061/(ASCE)CC.1943-5614.0000781 ↗
29. Flexural strengthening of reinforced concrete beam-column joints using innovative anchorage system
30. Estimating the seismic performance of CFRP-retrofitted RC beam-column connections using fiber-section analysis
31. EBROG and EBRIG methods for strengthening of RC beams by FRP sheets10.1080/19648189.2014.900523 ↗
32. Equivalent damping of bilinear hysteretic SDOF system considering the influence of initial elastic damping10.1016/j.soildyn.2017.01.017 ↗