Connections Between Precast Elements—Failure within Connection Region

French, Catherine; Hafner, Michael; Jayashankar, V.

doi:10.1061/(asce)0733-9445(1989)115:12(3171)

Cited by 41 publications

(16 citation statements)

References 4 publications

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“…Similar results were reported by French et al [7,8] on three different types of precast concrete connections. The results of their study indicated that the precast connections can provide adequate strength and energy dissipation with respect to monolithic concrete specimens.…”

Section: -Introductionsupporting

confidence: 90%

A new ductile moment-resisting connection for precast concrete frames in seismic regions: An experimental investigation

Parastesh

Hajirasouliha

Ramezani

2014

Engineering Structures

210

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A new ductile moment-resisting beam-column connection is developed for precast reinforced concrete (RC) frames in high seismic zones. The proposed connection provides good structural integrity in the connections and can reduce construction time by eliminating the need for formworks and welding, and minimizing cast-in-place concrete volume. A series of cyclic loading tests were carried out on six full-scale interior and exterior precast connections and two monolithic connections, all designed for use in high seismic zones. Test variables included the type of stirrups (open and closed) and the stirrup spacing in the beam connection zone. Test specimens were subjected to a constant axial load and a reverse cyclic loading based on a given displacement history. Flexural strength, ductility, strength degradation and energy dissipation capacity of the precast and monolithic connections are compared. The proposed interior and exterior moment-resisting connections proved to be efficient at improving the seismic performance of precast concrete frames in high seismic zones. While the precast connections provided adequate flexural strength, strength degradation and drift capacity, they exhibited considerably higher ductility and energy dissipation compared to similar monolithic specimens.

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Section: -Introductionsupporting

confidence: 90%

A new ductile moment-resisting connection for precast concrete frames in seismic regions: An experimental investigation

Parastesh

Hajirasouliha

Ramezani

2014

Engineering Structures

210

View full text Add to dashboard Cite

show abstract

“…These subas- semblies were designed to imitate comparable units from a companion study, 20,21 with the only variation between the two studies being the addition in this study of reinforcement couplers and associated lock nuts at the beam-joint interface. This testing was similar to an earlier study 22 and the test units were designed to investigate the likely response when using reinforcement couplers to join elements in monolithic precast concrete construction.…”

Section: External Beam-column Subassembliesmentioning

confidence: 96%

“…It is emphasised that results presented here are relevant for the specific system investigated in this study, and no suggestion is made or implied that this behaviour would be observed when using alternative coupler systems. However, French et al 22 did also report some slippage of the threaded coupler system used in their beam-column subassemblies when subjected to cyclic loading. The maximum interstorey drift angle permitted in New Zealand 23 is 2 .…”

Section: External Beam-column Subassembliesmentioning

confidence: 99%

Seismic performance of mechanically coupled reinforcing bars

Ingham

Bai

2009

Magazine of Concrete Research

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Seismic performance verification of a spiral thread mechanical reinforcement connection system for use in reinforced concrete structures was investigated by conducting both in-air component tests and structural subassembly tests. Current performance verification criteria listed in NZS 3101:2006 were found to be outdated and, following a review of various international protocols for testing mechanical connection systems, it was concluded that DIS 15835 protocols should instead be considered for adoption. Two external beam-column joint subassemblies having spiral thread mechanical reinforcement couplers installed at the column-joint interface were subjected to simulated seismic cyclic loading. It was found that bar curvature and the development of a non-uniform stress distribution around the perimeter of the reinforcement-coupler connection led to coupler slippage. However, the measured pinched hysteretic response owing to coupler slippage closely matched the response of companion tests where strength degradation was instead a result of excessive beam shear deformations. It was concluded that uniaxial tensile tests are unable accurately to demonstrate probable coupler performance in plastic hinge zones and that such tests should therefore not be used to predict likely ductile response in potential plastic hinge zones of reinforced concrete members.

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“…e short cantilever beam is casted as part of the precast column extending from the column edge. Another precast beam is connected to the cantilever beam through the lapping of the hooks [23,24]. Previous studies verified that the seismic performance of prefabricated structures can be improved and meet the demand of seismic codes as long as the connections are properly designed and retrofitted for strength and ductility [25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Novel Energy‐Dissipating Prefabricated Beam‐Column Joints

Liu

Chen

Lin

et al. 2019

Advances in Civil Engineering

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A new dapped-end beam to column connection is designed in this paper. Its assembly connection zone changes from inside the joint to midspan of the beam. The proposed connection can not only provide good structural integrity but also ensure that the plastic hinge moves away from the column edge. The rotational capacity of the plastic hinge determines the internal force redistribution of the joint and the energy dissipation capacity. The high-strength bolts and steel plates are used to realize connection, further enhancing the rotation of the plastic hinge and minimizing the cast-in-place concrete volume. Three full-scale exterior beam to column joints are casted and then subjected to reversal cyclic loading. The finite element (FE) analyses are carried out to compare with experimental results and study the effect of connection position on the structural behaviours. The obtained results show that the plastic hinges of all three specimens are firstly developed to a distance from the column edge, thus revealing that this kind of joint can achieve beam hinge mechanism and prevent joint shear failure. And the connection position is the most disadvantaged when coinciding with the plastic hinge zone, which would result in the excessive deformation and the early failure of the steel bar anchor system. The new type of joint shows good seismic performance during earthquake if the connection can be properly designed, and thus this kind of structural form can be applied to actual engineering structures in seismic regions.

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Connections Between Precast Elements—Failure within Connection Region

Cited by 41 publications

References 4 publications

A new ductile moment-resisting connection for precast concrete frames in seismic regions: An experimental investigation

A new ductile moment-resisting connection for precast concrete frames in seismic regions: An experimental investigation

Seismic performance of mechanically coupled reinforcing bars

Experimental Study on Novel Energy‐Dissipating Prefabricated Beam‐Column Joints

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