scholarly journals Structural shear performance of insulated precast concrete sandwich panels with steel plate connectors

2020 ◽  
Vol 215 ◽  
pp. 110691 ◽  
Author(s):  
Oliver Kinnane ◽  
Roger West ◽  
Richard O. Hegarty
Keyword(s):  
Steel Plate ◽  
Precast Concrete ◽  
Sandwich Panels ◽  
Shear Performance

EXPERIMENTAL STUDY ON SHEAR PERFORMANCE OF COMPOSITE CONNECTOR FOR PRECAST CONCRETE SANDWICH PANELS

2017 ◽  
Vol 4 (1) ◽  
Author(s):  
Ximei Zhai ◽  
Wenjian Ying ◽  
Wang Xueming
Keyword(s):  
Shear Test ◽  
Shear Failure ◽  
Precast Concrete ◽  
Concrete Strength ◽  
Failure Process ◽  
Sandwich Panels ◽  
Engineering Practice ◽  
Steel Bar ◽  
Shear Performance ◽  
Exterior Panel

In order to ensure desirable overall performance between interior panel and exterior panel for precast concrete sandwich panels, the shear performance of a new composite connector is investigated in this paper through the experiment of shear specimens, including 4 groups of bilateral shear test specimens and 8 groups of unilateral shear test specimens. The connector’s shear capability and shear failure process phenomenon of destruction of all specimens are obtained. Then the effect rule on shear performance of connector from positional relation of connector and distribution reinforcement and concrete strength are gained. The experimental results and analysis show that the shear failure model is bending shear failure of connector’s reinforcing steel bar, which is brittle failure; the measured value of shear force of experiment compared to the measures values for the actual project, the new composite connector provides an enough safety reserve; The relative position of connector and distribution reinforcement and concrete strength have no influence on the ultimate bearing shear capability; The shear performance of the new composite connector could satisfy the use requirement of sandwich wall panels based on the text results. Furthermore, the connectors perform superb anchoring bond and deformation capability. According to the results and analysis, the new composite connector could be popularly used in engineering practice.

State-of-the-Art of Precast Concrete Sandwich Panels

PCI Journal ◽  
1991 ◽  
Vol 36 (6) ◽  
pp. 78-98 ◽  
Author(s):  
Amin Einea ◽  
David C. Salmon ◽  
Gyula J. Fogarasi ◽  
Todd D. Culp ◽  
Maher K. Tadros
Keyword(s):  
State Of The Art ◽  
Precast Concrete ◽  
Sandwich Panels

scholarly journals Experimental and Numerical Studies on the Structural Performance of a Double Composite Wall

2021 ◽  
Vol 11 (2) ◽  
pp. 506
Author(s):  
Sun-Jin Han ◽  
Inwook Heo ◽  
Jae-Hyun Kim ◽  
Kang Su Kim ◽  
Young-Hun Oh
Keyword(s):  
Shear Strength ◽  
Precast Concrete ◽  
Structural Performance ◽  
Behavioral Characteristics ◽  
Element Analysis ◽  
Numerical Studies ◽  
Shear Performance ◽  
Flexural Analysis ◽  
Composite Wall ◽  
Current Code

In this study, experiments and numerical analyses were carried out to examine the flexural and shear performance of a double composite wall (DCW) manufactured using a precast concrete (PC) method. One flexural specimen and three shear specimens were fabricated, and the effect of the bolts used for the assembly of the PC panels on the shear strength of the DCW was investigated. The failure mode, flexural and shear behavior, and composite behavior of the PC panel and cast-in-place (CIP) concrete were analyzed in detail, and the behavioral characteristics of the DCW were clearly identified by comparing the results of tests with those obtained from a non-linear flexural analysis and finite element analysis. Based on the test and analysis results, this study proposed a practical equation for reasonably estimating the shear strength of a DCW section composed of PC, CIP concrete, and bolts utilizing the current code equations.

scholarly journals Thermal bridge effect of vertical diagonal tie connectors in precast concrete sandwich panels: an experimental and computational study

2020 ◽  
Vol 172 ◽  
pp. 08001
Author(s):  
Paul Klõšeiko ◽  
Reimo Piir ◽  
Marti Jeltsov ◽  
Targo Kalamees
Keyword(s):  
Computational Study ◽  
Precast Concrete ◽  
Sandwich Panels ◽  
Building Envelope ◽  
Heat Fluxes ◽  
Air Cavity ◽  
Thermal Transmittance ◽  
Thermal Bridge ◽  
Thermal Bridging ◽  
Air Cavities

The purpose of this work was to quantify the thermal bridge effect of vertical diagonal tie connectors in precast concrete sandwich panels (PCSPs). Special interest was in cases where the use of rigid insulation (e.g. PIR) would leave air gaps between insulation boards and diagonal ties, thus intensifying the thermal bridge. A climate chamber experiment using 5 different joint types was performed to gather reference data for CFD model validation. In the experiment, natural convection was observed in joints where no additional insulation was used, i.e. in air cavities. Significantly larger heat fluxes were measured in these cavities compared to insulated joints. The thermal bridging effect was evaluated for a typical PCSP (thermal transmittance without thermal bridges U = 0.11 W/(m²·K)) using CFD software taking into account 3D heat conduction and convection. Simulation results indicate that diagonal ties without adjacent air cavities increased the average thermal transmittance (U-value) of the envelope by 8%, diagonal ties with a 6 mm air cavity – 19...33% and diagonal ties with a 10 mm air cavity – 45...56%. In conclusion, it was found that the joints in insulation caused by diagonal ties affect the overall thermal performance of the building envelope significantly when efforts are not made to fill the air cavities around the connectors.

scholarly journals SHEAR PERFORMANCE OF SPECIAL DRY JOINTS FOR PRECAST CONCRETE SEGMENTS

2021 ◽  
Vol 11 (1) ◽  
pp. 60-72
Author(s):  
Watanachai Smittakorn ◽  
Tosporn Prasertsri ◽  
Worapon Pattharakorn ◽  
Pitcha Jongvivatsakul
Keyword(s):  
Prestressed Concrete ◽  
Precast Concrete ◽  
High Strength ◽  
Shear Capacity ◽  
Fiber Volume ◽  
Strength Concrete ◽  
Test Parameters ◽  
Ductile Shearing ◽  
Shear Performance ◽  
Normal Strength

The special dry joints for precast prestressed concrete segments are invented in this study toovercome the limitation of conventional dry joints. Eight specimens of special dry joints were madeand subjected to direct shear test. Test parameters comprise concrete compressive strength (normaland high strength concrete) and steel fiber volume added in the special dry joint (0%, 0.5%, and1.0%). Test results revealed that the inclusion of steel fibers remarkably enhanced the shear capacityand ductility index. Failure mode of specimens was changed from shearing off to concrete crackingaround shear key corners, defined as ductile shearing-off failure. Furthermore, the existing equationsfor predicting shear capacity of keyed joints were validated by the experimental results. Amongavailable equations from literatures, the Turmo’s equation yields better prediction of the shearcapacity for the special dry joint made with normal strength concrete.

scholarly journals Shear Capacity of Open Sandwich Steel Plate-Concrete Composite Slab: Experimental and Analytical Studies

2019 ◽  
Vol 2019 ◽  
pp. 1-14
Author(s):  
Lili Wu ◽  
Lipei An ◽  
Jiawei Li
Keyword(s):  
Failure Mode ◽  
Shear Force ◽  
Steel Plate ◽  
Concrete Slab ◽  
Experimental Studies ◽  
Shear Capacity ◽  
Crack Model ◽  
Composite Slab ◽  
Finite Element Software ◽  
Shear Performance

Considering that the fixed crack model by default of the general finite element software was unable to simulate the shear softening behavior of concrete in the actual situation, a rotational crack model based on the modified compression field theory developed by UMAT (user material) of ABAQUS software was proposed and applied to the nonlinear analysis, and a numerical simulated model for the steel-concrete composite slab was built for shear analysis. Experimental studies and numerical analyses were used to investigate the shear load-carrying capacity, deformation, and crack development in steel plate-concrete composite slab, as well as the effects of the shear span ratio and shear stud spacing on the shear performance and the contribution of the steel plate and the concrete to the shear performance. Shear capacity tests were conducted on three open sandwich steel plate-concrete composite slabs and one plain concrete slab without a steel plate. The results indicated that the shear-compression failure mode occurred primarily in the steel plate-concrete composite slab and that the steel plate sustained more than 50% of the total shear force. Because of the combination effect of steel plate, the actual shear force sustained by the concrete in the composite slab was 1.27 to 2.22 times greater than that of the calculated value through the Chinese Design Code for Concrete Structures (GB 50010-2010). Furthermore, the shear capacity of the specimen increases by 37% as the shear stud spacing decreases from 250 mm to 150 mm. By comparing the shear capacity, the overall process of load deformation development, and the failure mode, it was shown that the simulation results corresponded with the experimental results. Furthermore, the numerical simulation model was applied to analyze the influence of some factors on composite slab, and a formula of shear bearing capacity of slab was obtained. The results of the formula agreed with the test result, which could provide references to the design and application of steel plate-concrete composite slab.

scholarly journals Shear Performance of Optimized-Section Precast Slab with Tapered Cross Section

2018 ◽  
Vol 11 (1) ◽  
pp. 163 ◽  
Author(s):  
Hyunjin Ju ◽  
Sun-Jin Han ◽  
Hyo-Eun Joo ◽  
Hae-Chang Cho ◽  
Kang Kim ◽  
...  
Keyword(s):  
Cross Section ◽  
Design Method ◽  
Precast Concrete ◽  
Bending Moment ◽  
Shear Behaviour ◽  
Element Analysis ◽  
Cross Sectional ◽  
Shear Design ◽  
Shear Performance ◽  
And Performance

The optimized-section precast slab (OPS) is a half precast concrete (PC) slab that highlights structural aesthetics while reducing the quantity of materials by means of an efficient cross-sectional configuration considering the distribution of a bending moment. However, since a tapered cross section where the locations of the top and bottom flanges change is formed at the end of the member, stress concentration occurs near the tapered cross section because of the shear force and thus the surrounding region of the tapered cross section may become unintentionally vulnerable. Therefore, in this study, experimental and numerical research was carried out to examine the shear behaviour characteristics and performance of the OPS with a tapered cross section. Shear tests were conducted on a total of eight OPS specimens, with the inclination angle of the tapered cross section, the presence of topping concrete and the amount of shear reinforcement as the main test variables and a reasonable shear-design method for the OPS members was proposed by means of a detailed analysis based on design code and finite-element analysis.

The Shear Behavior of Precast Concrete Sandwich Panels with W-shaped SGFRP Shear Connectors

2018 ◽  
Vol 22 (10) ◽  
pp. 3961-3971 ◽  
Author(s):  
Huanzhi Jiang ◽  
Zhengxing Guo ◽  
Jiabin Liu ◽  
Hui Liu
Keyword(s):  
Precast Concrete ◽  
Sandwich Panels ◽  
Shear Behavior ◽  
Shear Connectors
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