Experimental Study of RC Prefabricated Shear Walls with Shear Keys Affected by a Slotted Floor Slab

Shen, Shifei; Cui, Yao; Pan, Peng; Gong, Ruzhi; Qian, Miao; Li, Wenfeng

doi:10.1061/(asce)as.1943-5525.0001000

Cited by 15 publications

(9 citation statements)

References 14 publications

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“…The floor slab of S1 began to crack at a drift of 1/300, after which the cracks continued to propagate. Meanwhile, deformation began to concentrate at the mid‐span of the floor slab because of the relative displacement between the wall segments. The deformation gradually grew larger, and the floor slab showed obvious flexure at 1/100.…”

Section: Test Resultsmentioning

confidence: 99%

Behaviour of wall segments and floor slabs in precast reinforced concrete shear walls assembled using steel shear keys (SSKW)

Shen

Pan

Qian

et al. 2019

Struct Control Health Monit

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Summary Reinforced concrete (RC) precast shear walls are commonly used in building structures. For transportation ease, large walls are divided into smaller segments and assembled at the construction site with various connection methods. This study focussed on the RC precast shear wall assembled using steel shear keys, which is simply called the steel shear key wall (SSKW) in this paper. Three SSKW specimens were designed and built by considering different sizes and numbers of shear keys. Quasi‐static cyclic loading tests were performed to investigate the strength and stiffness of the assembled SSKWs and the behaviour of the wall segments and floor slab. We found that adding strength and more shear keys gradually increased the lateral resistance and stiffness of the specimens and decreased the distortion and damage to the floor slabs. However, the specimens also exhibited lower ductility and energy dissipation with increasing link strength. Finally, an appropriate coupling ratio for SSKWs was suggested for their design in practical engineering.

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Section: Test Resultsmentioning

confidence: 99%

Behaviour of wall segments and floor slabs in precast reinforced concrete shear walls assembled using steel shear keys (SSKW)

Shen

Pan

Qian

et al. 2019

Struct Control Health Monit

Self Cite

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“…In contrast, slotted floor slabs ensure deformation capacity without weakening dry shear walls. Most importantly, the floor is better protected if slots are set to release concentrated deformation [19]. This paper designed a kind of bolt connection with horizontal flat-fell seam prefabricated concrete shear wall specimen pseudo-static test and numerical simulation analysis of two kinds of methods, from the bearing capacity, ductility, energy dissipation and the deformation and failure mode to study the seismic performance, authentication using this type connection mode for prefabricated shear wall structure in our country small and medium-sized urban and rural residents in seismic fortification of its feasible applicability.…”

Section: Literature Reviewmentioning

confidence: 99%

An exhaustive research and analysis on seismic performance of prefabricated concrete shear wall structure

Chen¹,

Poongodi²

2020

J. vibroeng.

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In order to accelerate the process of building industrialization, improve the overall stability and construction quality of the building. In this paper, a bolted connection method is designed to study the seismic performance of the composite concrete shear wall specimens with horizontal split joints from the aspects of bearing capacity, ductility, energy dissipation, deformation capacity and failure mode. The test results show that the bolted concrete shear wall is feasible and the connectors can effectively connect the upper and lower precast shear walls to form a whole with certain lateral stiffness. The energy dissipation capacity of the specimens is similar to that of other prefabricated concrete shear wall structures with “self-reduction”. The displacement Angle is greater than 1/120 of the limit value of the displacement Angle between elastic-plastic layers under the action of large earthquakes, and the specimen has good deformation capacity. The energy dissipation capacity of the structure from dynamics perspective reveals that smaller capacity of the specimen by providing energy dissipation factor E= 0.24 and equivalent viscous damping coefficient of 0.038.

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“…Fourteen displacement meters, with a precision of 0.01 mm and a range of ±100 mm, measured the global and local deformations of the specimen and SSKs. 24 Additionally, strain gauges were set on the longitudinal steel bars of the wall segments and the core area of the SSKs to monitor the real-time strains. The specimens were divided into the upper and lower parts at the middle height, and D7-D10 were set along the diagonal directions of both parts to monitor the respective shearing deformation.…”

Section: Instrumentationmentioning

confidence: 99%

“…23 Similarly, D11-D14 were installed onto the diagonal lines of SSKs to measure their shearing drifts. 24 Additionally, strain gauges were set on the longitudinal steel bars of the wall segments and the core area of the SSKs to monitor the real-time strains. Figure 8A-D shows test specimens W1, W2, W3, and W4, respectively.…”

Section: Instrumentationmentioning

confidence: 99%

Test and analysis of reinforced concrete (RC) precast shear wall assembled using steel shear key (SSK)

Shen

Pan

Qian

et al. 2019

Earthq Engng Struct Dyn

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Summary Reinforced concrete (RC) precast shear walls are extensively applied in practical engineering, owing to their fast construction speed. However, because of the transport conditions, RC precast shear walls have to be separated into small wall segments during the factory prefabrication procedure before being assembled on site. Typically, wet‐type jointing methods are adopted to link the segments, which is time‐consuming and results in unreliable post‐pouring area strength. To overcome this problem, the novel scheme of the steel shear key (SSK) featuring steel shear panels and combined fillet and plug welding is proposed. Three RC precast shear wall specimens with different linking strength, termed as weakened SSK wall, standard SSK wall, and strengthened SSK wall, respectively, and an integrated shear wall specimen were designed. Quasi‐static cyclic loading was applied to investigate the specimens' dynamic properties. The test results suggest the prefabricated wall segments equipped with SSKs showed reliable stiffness and bearing capacity and were improved in energy dissipation ability, compared with conventional shear walls. As the shear stiffness and number of equipped SSKs increased, the specimens exhibited higher strength, but their ductility and energy dissipation were slightly decreased. Most importantly, the standard SSK wall specimen could achieve satisfactory bearing capacity and deformability and is thus recommended for precast building structures. Finite element method (FEM) models were established to validate the test results, and parametric study analysis was conducted based on the coupling ratio of the SSK walls. Finally, an appropriate coupling ratio range is recommended for practical engineering applications.

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Experimental Study of RC Prefabricated Shear Walls with Shear Keys Affected by a Slotted Floor Slab

Cited by 15 publications

References 14 publications

Behaviour of wall segments and floor slabs in precast reinforced concrete shear walls assembled using steel shear keys (SSKW)

Behaviour of wall segments and floor slabs in precast reinforced concrete shear walls assembled using steel shear keys (SSKW)

An exhaustive research and analysis on seismic performance of prefabricated concrete shear wall structure

Test and analysis of reinforced concrete (RC) precast shear wall assembled using steel shear key (SSK)

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