Response of lap splice of reinforcing bars confined by FRP wrapping: modeling approach

2011 ◽  
Vol 37 (1) ◽  
pp. 95-110 ◽  
Author(s):  
Dam Xuan Thai ◽  
Amorn Pimanmas
Keyword(s):  
Reinforcing Bars ◽  
Lap Splice ◽  
Modeling Approach ◽  
Frp Wrapping

scholarly journals Study on the Bending and Joint Performances of Reinforced Concrete Beams Using High-Strength Rebars

2021 ◽  
Vol 13 (6) ◽  
pp. 3482
Author(s):  
Seoungho Cho ◽  
Myungkwan Lim ◽  
Changhee Lee
Keyword(s):  
Yield Strength ◽  
High Strength ◽  
Reinforced Concrete Beams ◽  
High Yield ◽  
Performance Tests ◽  
Reinforcing Bars ◽  
Joint Performance ◽  
Lap Splice ◽  
Reinforcing Bar ◽  
Nominal Strength

High-strength reinforcing bars have high yield strengths. It is possible to reduce the number of reinforcing bars placed in a building. Accordingly, as the amount of reinforcement decreases, the spacing of reinforcing bars increases, workability improves, and the construction period shortens. To evaluate the structural performance of high-strength reinforcing bars and the joint performance of high-strength threaded reinforcing bars, flexural performance tests were performed in this study on 12 beam members with the compressive strength of concrete, the yield strength of the tensile reinforcing bars, and the tensile reinforcing bar ratio as variables. The yield strengths of the tensile reinforcement and joint methods were used as variables, and joint performance tests were performed for six beam members. Based on this study, the foundation for using high-strength reinforcing bars with a design standard yield strength equal to 600 MPa was established. Accordingly, mechanical joints of high-strength threaded reinforcing bars (600 and 670 MPa) can be used. All six specimens were destroyed under more than the expected nominal strength. Lap splice caused brittle fractures because it was not reinforced in stirrup. Increases of 21% to 47% in the loads of specimens using a coupler and a lock nut were observed. Shape yield represents destruction—a section must ensure sufficient ductility after yielding. Therefore, a coupler and lock nut are effective.

Lap Splice Test of SD400 D10 Reinforcing Bars Confined with Spiral or U-Bar

2021 ◽  
Vol 33 (4) ◽  
pp. 389-398
Author(s):  
Jin-Gyu Kim ◽  
Sung-Chul Chun ◽  
In-Ho Kim
Keyword(s):  
Reinforcing Bars ◽  
Lap Splice

Tension Lap Splice Length of Reinforcing Bars Embedded in Reactive Powder Concrete (RPC)

Structures ◽  
2019 ◽  
Vol 19 ◽  
pp. 362-368 ◽  
Author(s):  
Hussein Al-Quraishi ◽  
Mahdi Al-Farttoosi ◽  
Raad AbdulKhudhur
Keyword(s):  
Reactive Powder Concrete ◽  
Reinforcing Bars ◽  
Lap Splice ◽  
Reactive Powder

scholarly journals Feasibility of Reduced Lap-Spliced Length in Polyethylene Fiber-Reinforced Strain-Hardening Cementitious Composite

2018 ◽  
Vol 2018 ◽  
pp. 1-10
Author(s):  
Wonchang Choi ◽  
Seok-Joon Jang ◽  
Hyun-Do Yun
Keyword(s):  
Strain Hardening ◽  
Cement Composite ◽  
Cementitious Composite ◽  
Fiber Reinforced ◽  
Interfacial Behavior ◽  
Reinforcing Bars ◽  
Cracking Behavior ◽  
Lap Splice ◽  
Cyclic Tension ◽  
Polyethylene Fiber

This research investigates the interfacial behavior between polyethylene (PE) fiber-reinforced strain-hardening cement composite (PE-SHCC) and reinforcing bars that are spliced in the tension region to determine feasibility of reduced lap-spliced length in PE-SHCC. Twenty test specimens were subjected to monotonic and cyclic tension loads. The variables include the replacement levels of an expansive admixture (0% and 10%), the compressive strength of the SHCC mixtures (40 MPa and 80 MPa), and the lap-spliced length in the tension region (40% and 60% of the splice length recommended by ACI 318). The PE-SHCC mixture contains polyethylene fiber to enhance the tensile strength, control the widths of the cracks, and increase the bond strength of the lap splice reinforcement and the calcium sulfo-aluminate- (CSA-) based expansive admixture to improve the tension-related performance in the lap splice zone. The results have led to the conclusion that SHCC mixtures can be used effectively to reduce the development length of lap splice reinforcement up to 60% of the splice length that is recommended by ACI 318. The addition of the calcium sulfo-aluminate-based expansive admixture in the SHCC mixtures improved the initial performance and mitigated the cracking behavior in the lap splice region.

Seismic Performance of Bridge Pier with FRP Wrapping

2006 ◽  
Vol 326-328 ◽  
pp. 1717-1720 ◽  
Author(s):  
Hyung Joong Joo ◽  
Seung Sik Lee ◽  
Soon Jong Yoon ◽  
Joo Kyung Park ◽  
Sun Kyu Cho
Keyword(s):  
Seismic Performance ◽  
Loading Condition ◽  
Plastic Hinge ◽  
Seismic Loading ◽  
Concrete Cover ◽  
Bridge Pier ◽  
Concrete Bridge ◽  
Lap Splice ◽  
Ductile Behavior ◽  
Frp Wrapping

This paper presents the results of an experimental study on the seismic performance of reinforced concrete (RC) bridge piers wrapped with FRP at the lap-spliced region. It is well known that the FRP wrapping on the surface of concrete bridge pier can prevent concrete cover from spalling and it can reduce the slip displacement of lap-spliced longitudinal re-bars due to confinement. In order to develop the effective way of strengthening the concrete bridge pier with poor lap-spliced longitudinal re-bars, which is not designed under seismic design consideration, a series of pier test under seismic loading condition is conducted. As a result, FRP wrapped bridge pier under seismic loading exhibits ductile behavior with plastic deformation at lap-spliced region. Half-scaled six circular and nine square pier specimens were tested under uniform concentric axial compression and quasi-static lateral loading at the top of the pier. For the purpose of comparison, two piers without lap-splice and two piers with lap-splice were not wrapped with FRP and tested under same loading condition. Other experimental parameters were the height of FRP wrapping and the reinforcing method. The experimental results showed that the FRP wrapping could significantly increase ductility of piers with lap-spliced longitudinal re-bars at the potential plastic hinge region.

Influence of FRP wrapping on reinforcement performances at lap splice regions in RC columns

2017 ◽  
Vol 116 ◽  
pp. 313-324 ◽  
Author(s):  
Vincenzo Giamundo ◽  
Gian Piero Lignola ◽  
Francesco Fabbrocino ◽  
Andrea Prota ◽  
Gaetano Manfredi
Keyword(s):  
Rc Columns ◽  
Lap Splice ◽  
Frp Wrapping
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