Seismic response of reinforced concrete walls with lap splices

Villalobos, Enrique; Escolano‐Margarit, David; Ramírez-Márquez, Ana Luisa; Pujol, Santiago

doi:10.1007/s10518-016-0051-0

Cited by 11 publications

(4 citation statements)

References 6 publications

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“…However, unlike for continuous longitudinal reinforcement, a larger moment gradient is now expected to increase the ductility capacity. This effect has been mentioned in recent wall tests with lap splices (Hardisty et al 2015;Villalobos et al 2017). Because the member shear span only insufficiently reflects the effect of the moment gradient along the lap splice, the ratio between the lap splice length and the shear span should be considered instead, see Fig.…”

Section: Moment Gradientmentioning

confidence: 98%

Influence of Lap Splices on the Deformation Capacity of RC Walls. I: Database Assembly, Recent Experimental Data, and Findings for Model Development

et al. 2017

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Recent postearthquake missions have shown that reinforced concrete (RC) wall buildings can experience critical damage owing to lap splices, which led to a recent surge in experimental tests of walls with such constructional details. Most of the 16 wall tests described in the literature thus far were carried out in the last six years. This paper presents a database with these wall tests, including the description of a new test on a wall with lap splices and a corresponding reference wall with continuous reinforcement. They complement the existing tests by investigating a spliced member with a shear span ratio smaller than two, which is the smallest among them. The objective of this database is to collect information not just on the force capacity but mainly on the deformation capacity of lap splices in reinforced concrete walls. It is shown that (1) well-confined lap splices relocate the plastic hinge above the lap splice, (2) lap splices with adequate lengths but insufficiently confined attain the peak force but their deformation capacity is significantly reduced, and (3) short and not well-confined lap splices fail before reaching the strength capacity. The analysis of the test results, which are used in the companion paper for the finite element analysis of walls with lap splices, indicates in particular that the confining reinforcement ratio and the ratio of shear span to lap splice length influence the lap splice strain capacity.

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Section: Moment Gradientmentioning

confidence: 98%

Influence of Lap Splices on the Deformation Capacity of RC Walls. I: Database Assembly, Recent Experimental Data, and Findings for Model Development

et al. 2017

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“…Failure in the moment gradient region initiates from the extremity with a higher moment. The moment gradient along the lap splice influences deformability, and a larger moment gradient is required to increase the ductility capacity [18].…”

Section: State Of Stress and Moment Gradientmentioning

confidence: 99%

Efficiency Of Bond-Slip Response For FE Numerical Modeling Of Reinforced Concrete- A Review

Kumar,

Appa Rao

2023

Proceedings of the 11th International Conference on Fracture Mechanics of Concrete and Concrete Structures

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The realistic response of reinforced concrete (RC) structures can be reflected through numerical modeling in finite element (FE) analysis when the true bond-slip response is assigned. The bond on rebar with the surrounding concrete prevents excessive slipping to maintain compatibility. The bond controls the stiffness and capacity of RC members, including cracking, deformations, and hysteretic response under seismic loading. This paper reports on bond-slip responses adopted between deformed rebar and concrete. The complexity of the bond-slip behavior presents a significant challenge in developing accurate bond-slip models; since the factors like rebar surface deformation and rib area, concrete strength and stiffness, rebar diameter and spacing, casting position, and confinement of the surrounding concrete influence the bond. This paper highlights different types of bond-slip models adopted by researchers, including complex cyclic bond-slip deterioration model under reverse cyclic loading. It emphasizes the application of bond-slip models to simulate the interaction between the deformed rebar and the surrounding concrete in the analysis of RC structures, as the bond stress depends on the corresponding slip. Several studies have been reported on the bondslip characteristics of deformed rebar, on its application in finite element analysis. In this study, two modeling techniques have been adopted using bond-slip characteristics of rebar in FEA of RC structures to predict crack spacing, stiffness, and deformation.

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“…The results show that the UPT wall structures exhibit no residual deformation and show minimal damage during an earthquake. Some studies [1,14] indicate that the seismic performance of the PCSW structure with AHW connection (i.e., longitudinal rebars spliced using sleeves combined with high-strength mortar) and the CCSW structure are similar. However, there has been little investigation on the seismic behaviour of PCSW structures with AHW connection using bolted connections.…”

Section: Horizontal Connectionmentioning

confidence: 99%

Seismic Performance of Base‐Isolated Precast Concrete Shear Wall Structure with AHW Connections

Wang

2018

Shock and Vibration

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To improve the seismic performance and seismic reliability of precast concrete shear wall (PCSW) structure with improved assembly horizontal wall connections (AHW connections), base isolation technology was proposed to be applied in the PCSW structure. Two 1/4-scaled structure models using the improved AHW connections were constructed: a lead-rubber bearing (LRB) base-isolated PCSW structure model and a base-fixed PCSW structure model. Shaking table tests were conducted on these two models with three strong ground motions to assess the seismic performance of the structures. It was found that the improved AHW connections in the base-isolated PCSW structure are useful and effective and that they fulfil the requirements to be met by the connections to withstand an earthquake. In addition, the maximum absolute acceleration and base shear force of the base-isolated PCSW structure model were less than those of the base-fixed PCSW structure model, and the isolation effect on the absolute acceleration responses and base shear responses increased with increase in the intensity of ground motions. In a word, the seismic performance and seismic reliability of PCSW structures can be effectively improved using base isolation technology. After this investigation, the seismic responses of the base-isolated PCSW structure model were numerically simulated using OpenSees software. There was a reasonable agreement between the numerically simulated results and test results; thus, the numerical simulation method and analysis model used for the base-isolated PCSW structure model were verified.

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Seismic response of reinforced concrete walls with lap splices

Cited by 11 publications

References 6 publications

Influence of Lap Splices on the Deformation Capacity of RC Walls. I: Database Assembly, Recent Experimental Data, and Findings for Model Development

Influence of Lap Splices on the Deformation Capacity of RC Walls. I: Database Assembly, Recent Experimental Data, and Findings for Model Development

Efficiency Of Bond-Slip Response For FE Numerical Modeling Of Reinforced Concrete- A Review

Seismic Performance of Base‐Isolated Precast Concrete Shear Wall Structure with AHW Connections

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