Evaluate Performance of Precast Concrete Wall to Wall Connection

Vaghei, Ramin; Hejazi, Farzad; Taheri, Hafez; Jaafar, Mohd Saleh; Ali, Abang Abdullah Abang

doi:10.1016/j.apcbee.2014.01.051

Cited by 25 publications

(15 citation statements)

References 7 publications

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“…In this type of connection, the assembly process requires minimum work in the construction site. In precast connection, ensuring the integration the connection between the precast elements is of significant concern as it ensures the stability of buildings when subjected to dynamic loads from earthquakes excitation, vehicles, and machineries [16]. In the proposed U-shaped steel channel, the connection was developed for seismic zones.…”

Section: B Wire Ropes Connectionmentioning

confidence: 99%

Wall to Wall Horizontal Connection for Precast Concrete Structures

2019

IJRTE

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Precast concrete wall is one of the prefabricated components of high demands in the construction industry especially in residential buildings as it combines the benefit of rapid speed of construction, good quality control and minimum labour intensity at the construction site. Precast wall is produced in forms of wall panels and connected in the construction site to form an integrated structural element called precast concrete wall. However, the connection of wall panels is a key factor as it provides the structure integrity and robustness of the overall structural system. Therefore, this paper aims to describe and summarize types of precast wall-to-wall horizontal connection in terms structural behaviours such as embedded length, bonding stress, seismic behaviours and modes of failure. A total number of ten (10) out of eighteen (18) papers will be reviewed and discussed. The findings show that loop connection is suitable for seismically stabile zones as it is not capable to withstand lateral load action effectively whereas wire rope connection has insufficient ductility as the load -carrying capacity is governed by yielding of the lock bar and crushing of the joint mortar. Furthermore, U-shaped steel channel connection, the connection was developed for seismic zones. Providing U-shaped rubber in between the U-shape steel channel has made the connection more flexible with energy dissipater system. Keywords: Precast concrete wall-to-wall connection; structural behaviours of precast wall-to-wall horizontal connections; mode of failure of precast wall-to-wall horizontal connections.

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Section: B Wire Ropes Connectionmentioning

confidence: 99%

Wall to Wall Horizontal Connection for Precast Concrete Structures

2019

IJRTE

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“…The experimental programs that served as basis for the commission's report include the work of Halasz and Tantow, Cholewicki, Pommeret, and Fauchart and Cortini, who used similar test setups as the one used in the present study. Shear tests with other test setups to investigate factors that influence the load‐carrying capacity have also been published . In all investigations, regardless of testing method, it was recognized that the ultimate capacity was influenced by a number of factors, including the number of shear keys, the cross‐sectional area of the keys, the strength of the grout mortar, the degree of transverse reinforcement, and the magnitude of external transverse confinement stresses.…”

Section: Previous Investigations On Shear Connectionsmentioning

confidence: 99%

“…Shear tests with other test setups to investigate factors that influence the load-carrying capacity have also been published. [9][10][11][12][13][14] In all investigations, regardless of testing method, it was recognized that the ultimate capacity was influenced by a number of factors, including the number of shear keys, the cross-sectional area of the keys, the strength of the grout mortar, the degree of transverse reinforcement, and the magnitude of external transverse confinement stresses.…”

Section: Previous Investigations On Shear Connectionsmentioning

confidence: 99%

Test and analysis of a new ductile shear connection design for RC shear walls

Sørensen

Hoang

Olesen

et al. 2017

Structural Concrete

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Funding informationDanish Association for Precast Concrete Elements; COWI Foundation. This paper presents a new and construction-friendly shear connection for the assembly of precast reinforced concrete shear wall elements. In the proposed design, the precast elements have indented interfaces and are connected by a narrow zone grouted with mortar and reinforced with overlapping U-bar loops. Contrary to conventional shear connections, the planes of the U-bar loops are here parallel to the plane of the wall elements. This feature enables a constructionfriendly installation of the elements without the risk of rebars clashing. The core of mortar inside each U-bar loop is reinforced with a transverse double T-headed bar to ensure transfer of tension between the overlapping U-bars. Push-off tests show that a significantly ductile load-displacement response can be obtained by the new solution as compared to the performance of the conventional keyed shear connection design. The influence of the interface indentation geometry was investigated experimentally and the failure modes in the push-off tests were identified by use of digital image correlation (DIC). For strength prediction, rigid plastic upper-bound models have been developed with inspiration from the observed failure mechanisms. Satisfactory agreement between tests and calculations has been obtained. K E Y W O R D Sconcrete plasticity, digital image correlation, ductility, keyed shear connections, robustness | INTRODUCTIONStructural solutions based on precast concrete elements are often more economically feasible than in situ cast solutions, because precast technology enables a reduction of construction time as well as labor cost. When using precast solutions, the on-site work mostly consists of assembling and connecting the precast elements into an integrated structural system. Hence, connection designs that are constructionfriendly play an important role for the overall cost reduction. It is, however, a challenge to design connections that are easy to construct and at the same time have structural performance (in terms of strength and ductility) which can be compared with that of in situ cast solutions. In cases with unusual structural geometry, it may be necessary to supplement the advantages of precast construction with in situ cast solutions in selected zones. An example of how current precast solutions have been pushed to the limit can be studied in References 1 and 2 that report on the design and construction of a landmark building in Copenhagen, Denmark. The leaning characteristic of the building imposed serious challenges to the design of the shear connections between the precast panels for insurance of overall structural stability.Currently, structural continuity between precast shear panels is established by use of narrow keyed connections containing overlapping U-bars and grouted with mortar (see Figure 1). However, with this conventional solution, which has been used since the 1960s, it is difficult to obtain full structural continuity because the ...

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“…Eight large-scale posttensioned precast columns were carried out to validate the detailed finite element model subjected to cyclic tests which was developed by ABAQUS platform, and the outcomes showed a good agreement [14]. A 3D finite element model of precast walls and connection was developed using finite element model [15]. A numerical analytical model with nonlinear factors of prestressing precast concrete bridge column systems, which consists of a segment model, prestressing tendon, and joint mode, was developed [16].…”

Section: Introductionmentioning

confidence: 99%

Development of Constitutive Model for Precast Prestressed Concrete Segmental Columns

Esfahani

Hejazi

Vaghei

et al. 2016

Modelling and Simulation in Engineering

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The interest of using precast segmental columns in construction of concrete bridges has significantly increased in recent years. One research area of concrete bridges is the application of Precast Prestressed Concrete Segmental (PPCS) Column in any structural analysis software or FE program code. Modeling a PPCS column, which consists of various materials with interaction between them, is complicated and time-consuming. This research attempts to formulate the stiffness matrix of PPCS columns in order to form the constitutive model in linear form to evaluate the response of the columns. A two-dimensional finite element model is presented in the finite element package ANSYS. Parametric studies are conducted by finite element models to verify the constitutive models for the PPCS column with a different number of concrete segments. Comparison between the constitutive model and the FE program results indicates that the constitutive model is accurate enough to predict the deformation of the PPCS columns.

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Evaluate Performance of Precast Concrete Wall to Wall Connection

Cited by 25 publications

References 7 publications

Wall to Wall Horizontal Connection for Precast Concrete Structures

Wall to Wall Horizontal Connection for Precast Concrete Structures

Test and analysis of a new ductile shear connection design for RC shear walls

Development of Constitutive Model for Precast Prestressed Concrete Segmental Columns

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