scholarly journals Evaluation of formulations for predicting the shear strength of concrete filled circular holes in steel plates

2022 ◽  
Vol 15 (4) ◽  
Author(s):  
Larice Gomes Justino Miranda ◽  
Otávio Prates Aguiar ◽  
Paulo Estevão Carvalho Silvério ◽  
Rodrigo Barreto Caldas
Keyword(s):  
Shear Strength ◽  
Composite Structures ◽  
Plate Thickness ◽  
Perforated Plate ◽  
Steel Plates ◽  
Shear Connectors ◽  
Single Hole ◽  
Concrete Confinement ◽  
Circular Holes ◽  
The Individual

Abstract Since the development of perforated plate shear connectors, different formulations have been proposed to predict their shear strength. Most of these formulations were derived from standard push-tests on multiple concrete filled holes (CFH) specimens simulating specific steel-concrete composite beam applications. Aiming at a more general application of these connectors in composite structures and the understanding of the physical and geometric parameters that influence their shear strength, the present work evaluated the use of 12 different formulations to predict 92 test results of single-hole specimens extracted from the literature. Such tests were chosen because the single-hole configuration allows better isolation of the connection behavior which facilitates comparative analysis. The predictions were statistically evaluated, and it was considered that the best formulations were those that showed lower scatter of data and a correction factor closer to one. Also, it was investigated if the individual terms that constitute the formulations adequately describe or show relation to the mechanics that govern the connection. It was verified that the best statistically rated formulations were also the ones showing clearer relation to the connector mechanical behavior. Among the evaluated formulations, three were significantly better than the others for strength prediction, however, it was noted that they can be further improved by considering the influence of concrete confinement and plate thickness on the hole’s strength.

Load Bearing Capacity Tests of Mechanical Joining on Timber-Concrete Beam

2014 ◽  
Vol 893 ◽  
pp. 614-617
Author(s):  
Petr Agel ◽  
Antonín Lokaj
Keyword(s):  
Shear Strength ◽  
Composite Structures ◽  
Concrete Beam ◽  
Concrete Slab ◽  
Residential Buildings ◽  
Steel Plates ◽  
Timber Beam ◽  
Load Bearing Capacity ◽  
Technical Literature ◽  
Mechanical Joining

Timber-concrete composite structures, which use advantages of both materials, are suitable for new works and reconstructions of civil and residential buildings. There are described many methods of joining between timber beam and concrete slab in technical literature. Joints are more and more sophisticated which brings higher demands on work control and technology. Main goal of the paper is in design technologically low demanding method of joining with steel plates and nails, to test its shear strength and to compare it with other similar joining .

scholarly journals Load Bearing Capacity Tests of Mechanical Joining on Timber-Concrete Beam / Laboratorní Testování Únosnosti Mechanického Spřažení Dřevobetonového Nosníku

2012 ◽  
Vol 12 (2) ◽  
pp. 1-32 ◽  
Author(s):  
Petr Agel ◽  
Antonín Lokaj
Keyword(s):  
Shear Strength ◽  
Composite Structures ◽  
Concrete Beam ◽  
Concrete Slab ◽  
Residential Buildings ◽  
Steel Plates ◽  
Timber Beam ◽  
Load Bearing Capacity ◽  
Technical Literature ◽  
Mechanical Joining

Abstract Timber-concrete composite structures which use advantages of both materials are suitable for new works and reconstructions of civil and residential buildings. There are described many methods of joining between timber beam and concrete slab in technical literature. Joints are more and more sophisticate which brings higher demands of work control and technology. Main goal of this paper is in design technologically low demanding method of joining with steel plates and nails, to test its shear strength and compare it with other similar joining method.

scholarly journals Shear Resistance Assessment of the Y-Type Perfobond Rib Shear Connector under Repeated Loadings

2021 ◽  
Vol 11 (16) ◽  
pp. 7667
Author(s):  
Sang-Hyo Kim ◽  
Oneil Han ◽  
Suro Yoon ◽  
Tuguldur Boldoo
Keyword(s):  
Shear Strength ◽  
Energy Dissipation ◽  
Composite Structures ◽  
Reduction Factor ◽  
Dissipated Energy ◽  
Ultimate Shear Strength ◽  
Residual Shear Strength ◽  
Shear Connectors ◽  
Repeated Load ◽  
Repeated Loads

The steel–concrete composite structures consist of two different material parts, which are connected with reliable shear connectors to enable the combined action of the steel and concrete members. The shear connectors may experience either one-directional repeated cyclic loadings or fully reversed cyclic loadings depending on the structural functions and acting loadings. It is essential for structural engineers to estimate the residual shear strength of the shear connectors after action of repeated loads. The characteristics of deteriorating shear capacities of Y-type perfobond rib shear connectors under repeated loads were investigated to estimate the energy dissipating capacity as well as the residual shear strength after repeated loads. To perform the repeated load experiments four different intensities of repeated loads were selected based on the monotonic push-out tests which were performed with 15 specimens with five different design variables. The selected load levels range from 35% to 65% of the representative ultimate shear strength under the monotonic load. In total, 12 specimens were tested under five different repeated load types which were applied to observe the energy dissipating characteristics under various load intensities. It was found that the dissipated energy per cycle becomes stable and converges with the increasing number of cycles. A design formula to estimate the residual shear strength after the repeated loads was proposed, which is based on the residual shear strength factor and the nominal ultimate shear strength of the fresh Y-type perfobond rib shear connectors. The design residual shear strength was computed from the number of repeated loads and the energy dissipation amount per cycle. The reduction factor for the design residual shear strength was also proposed considering the target reliability level. The various reduction factors for the design residual shear strength were derived based on the probabilistic characteristics of the residual shear strength as well as the energy dissipation due to repeated loads.

Load Bearing Capacity Tests of Mechanical Joining on Timber-Concrete Beam

2014 ◽  
Vol 1020 ◽  
pp. 177-181
Author(s):  
Petr Agel ◽  
Antonin Lokaj
Keyword(s):  
Shear Strength ◽  
Composite Structures ◽  
Concrete Beam ◽  
Concrete Slab ◽  
Residential Buildings ◽  
Steel Plates ◽  
Timber Beam ◽  
Load Bearing Capacity ◽  
Technical Literature ◽  
Mechanical Joining

Timber-concrete composite structures, which use advantages of both materials, are suitable for new works and reconstructions of civil and residential buildings. There are described many methods of joining between timber beam and concrete slab in technical literature. Joints are more and more sophisticated which brings higher demands on work control and technology. Main goal of the paper is in design technologically low demanding method of joining with steel plates and nails, to test its shear strength and to compare it with other similar joining .

FIRE RESISTACE OF SHEAR CONNECTORS FOR COMPOSITE BEAMS

2020 ◽  
Vol 92 (6) ◽  
pp. 59-65
Author(s):  
G.P. TONKIH ◽  
◽  
D.A. CHESNOKOV ◽  
◽  
Keyword(s):  
Fire Resistance ◽  
Composite Structure ◽  
Composite Structures ◽  
Composite Beams ◽  
Design Codes ◽  
Connection Strength ◽  
Shear Connectors ◽  
Shear Connection ◽  
Capacity Reduction ◽  
Russian Research

Most of Russian research about composite structure fire resistance are dedicated to the composite slab behavior. The composite beams fire resistance had been never investigated in enough volume: the temperature evaluation within the scope of the actual Russian design codes leads to the significant reduction in the shear connection strength. Meanwhile, there no correlation between the strength decreasing and type of the shear connection. The article provides an overview of the relevant researches and offers some approaches which could take into account bearing capacity reduction of the shear connectors within composite structures design.

Shear strength reduction of trapezoidal corrugated steel plates with artificial corrosion pits

2021 ◽  
Vol 180 ◽  
pp. 106583
Author(s):  
Wei Xing ◽  
Li Gang ◽  
Xiao Lin ◽  
Zhou Linjun ◽  
He Ke ◽  
...  
Keyword(s):  
Shear Strength ◽  
Strength Reduction ◽  
Steel Plates ◽  
Corrosion Pits ◽  
Shear Strength Reduction

Effect of Detailed Formations on the In-Plane Shear Capacity of Hairpin Connectors in Precast RC Floor Slabs

2010 ◽  
Vol 163-167 ◽  
pp. 1510-1514 ◽  
Author(s):  
Rui Pang ◽  
Shu Ting Liang ◽  
Xiao Jun Zhu ◽  
Yao Meng
Keyword(s):  
Simulation Analysis ◽  
Plate Thickness ◽  
Shear Capacity ◽  
Steel Plates ◽  
Strong Impact ◽  
Deformation Capacity ◽  
Initial Stiffness ◽  
Plane Shear ◽  
Floor Slabs ◽  
Strength And Deformation

Detailed formation of precast floor slab connectors has significant effect on their shear capacity, but there is no such specific provision on it at present. The effects of detailed formations on the shear strength, stiffness and deformation capacity of hairpin connectors(HPC) were studied, through numerical simulation analysis under in-plane shear force. The imbedded depth (d), slug length (h), steel plate thickness (t) and its stickout(s) were taken as parameters. The analysis results show that: ⅰ) the increase of imbedded depth can improve the bearing capacity and stiffness of HPC, but decrease the deformation capacity; ⅱ) with the increase of slug length, the HPC strength, stiffness and deformation capacity raised a lot; ⅲ) the steel plates’ thickness has small effect on the stiffness, but has strong impact on the strength and deformation capacity of HPC. ⅳ) the stickout can affect the initial stiffness and yield strength of HPC slightly, but has a considerable impact on its ultimate strength and deformation capacity. On the basis of analysis, recommendations on formation details of HPC are proposed for design and construction.

Flexural bearing capacity of RC hollow slab beam strengthened by steel plates of different thicknesses

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Long Liu ◽  
Lifeng Wang ◽  
Ziwang Xiao
Keyword(s):  
Finite Element ◽  
Bearing Capacity ◽  
Steel Plate ◽  
Plate Thickness ◽  
Research Field ◽  
Steel Plates ◽  
Nonlinear Material ◽  
Finite Element Models ◽  
Content Type ◽  
Flexural Bearing Capacity

PurposeThe flexural reinforcement of bridges in-service has been an important research field for a long time. Anchoring steel plate at the bottom of beam is a simple and effective method to improve its bearing capacity. The purpose of this paper is to explore the influence of anchoring steel plates of different thicknesses on the bearing capacity of hollow slab beam and to judge its working status.Design/methodology/approachFirst, static load experiments are carried out on two in-service RC hollow slab beams; meanwhile, nonlinear finite element models are built to study the bearing capacity of them. The nonlinear material and shear slip effect of studs are considered in the models. Second, the finite element models are verified, and the numerical simulation results are in good agreement with the experimental results. Finally, the finite element models are adopted to carry out the research on the influence of different steel plate thicknesses on the flexural bearing capacity and ductility.FindingsWhen steel plates of different thicknesses are adopted to reinforce RC hollow slab beams, the bearing capacity increases with the increase of the steel plate thickness in a certain range. But when the steel plate thickness reaches a certain level, bearing capacity is no longer influenced. The displacement ductility coefficient decreases with the increase of steel plate thickness.Originality/valueBased on experimental study, this paper makes an extrapolation analysis of the bearing capacity of hollow slab beams reinforced with steel plates of different thicknesses through finite element simulation and discusses the influence on ductility. This method not only ensures the accuracy of bearing capacity evaluation but also does not need many samples, which is economical to a certain extent. The research results provide a basis for the reinforcement design of similar bridges.

Cutting of a Longitudinally Stiffened Plate by a Wedge

1994 ◽  
Vol 38 (04) ◽  
pp. 340-348 ◽  
Author(s):  
Jeom Kee Paik
Keyword(s):  
Plate Thickness ◽  
Wedge Angle ◽  
Steel Plates ◽  
Test Results ◽  
Stiffened Plate ◽  
Absorbed Energy ◽  
Dimensionless Analysis ◽  
Cutting Length ◽  
Plate Aspect Ratio ◽  
Stiffened Steel

The aim of this study is to obtain test data for longitudinally stiffened steel plates which are quasistatically cut by a rigid wedge, idealizing the deck or bottom platings in ship collision or grounding, and also to derive an empirical formula relating the absorbed energy and cutting length. A series of tests for longitudinally stiffened high-tensile steel plates is conducted, varying several factors, namely plate thickness, plate aspect ratio, angle/shape of wedge tip and property of stiffeners. A total of 50 specimens with thicknesses in the range of 3.4 to 7.8 mm and wedge angles of 15, 30, 45, and 60 deg, including one unstiffened and two horizontally stiffened plate specimens, were tested. The importance of each parameter and its effect on the cutting response are investigated. By dimensionless analysis of the test results obtained here, the energy absorbed while a longitudinally stiffened plate is cut by a wedge is expressed as a function of cutting length, yield stress, equivalent plate thickness, and wedge angle. Incorporation of dynamic effects into the static formula is suggested. A comparison of the proposed solutions with the previous formulas or drop-hammer test results is made.

Sign in / Sign up

Export Citation Format

Share Document