scholarly journals Parametric study of I-shaped shear connectors with different orientations in push-out test

2021 ◽  
Vol 15 (57) ◽  
pp. 24-39
Author(s):  
Boursas Farid ◽  
Djamel Boutagouga
Keyword(s):  
Shear Strength ◽  
Parametric Study ◽  
Failure Modes ◽  
Concrete Strength ◽  
Steel Grade ◽  
Shear Connector ◽  
Shear Connectors ◽  
High Shear Strength ◽  
Push Out ◽  
Monotonic Load

A great deal of research has been conducted to improve the understanding of the behavior of new types of shear connectors. This article presents the study of I-shaped connectors behavior under monotonic load welded in four different orientations in order to get the position which gives the high shear strength and the best ductility. For this purpose, eight push-out test specimens with I-shaped shear connectors with different orientations and dimensions were tested in C20/25 and C30/37 concrete classes. The load-slip behavior and failure modes of the tested connectors are presented and discussed. Furthermore, a non-linear 3D finite element modelling of the push-out test is performed in order to further investigate the influencing parameters on the I-shaped connectors behavior. Hence, a parametric study is carried out by using the established 3D finite elements model to study the influence of concrete strength, connector’s steel grade, reinforcements, height and length of the connector. Both experimental and numerical results show that there is a privilege orientation for which the shear strength of an I-shaped shear connector is significantly higher than that of all other tested orientations.

scholarly journals Experimental Study on an Innovative Shear Connector in Steel-UHPC Composite Structure

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Yang Liu ◽  
Dan Zeng ◽  
Lei Cao ◽  
Naiwei Lu
Keyword(s):  
Bearing Capacity ◽  
Failure Modes ◽  
Steel Plate ◽  
Least Square Method ◽  
Maximum Load ◽  
Least Square ◽  
Shear Connector ◽  
Shear Connectors ◽  
Shear Bearing Capacity ◽  
Push Out

In order to improve the stiffness and shear bearing capacity of steel-UHPC composite bridge, an innovative shear connector named arc-shaped reinforcement shear connector was proposed and compared with the stud and perforated bar steel plate shear connector using the static push-out test. Considering shear connector diameter, a total of ten push-out specimens for five groups were designed. The results indicated that the failure modes and failure mechanism of the arc-shaped reinforcement shear connectors were significantly different from stud shear connector and perforated bar steel plate. Obvious failure characteristics such as crack and reinforcement were not observed for the arc-shaped reinforcement specimens except for fine cracks on the top of one specimen, but these were observed for the others two types of shear connector. The relative slip value of arc-shaped reinforcement shear connector at the maximum load was the smallest and less than 1 mm in three types of shear connectors. The stiffness and shear bearing capacity of arc-shaped reinforcement were higher than those of stud and perforated bar steel plate under the same diameter. Increasing arc-shaped reinforcement diameter could improve significantly static behavior of shear connector. When the diameter of arc-shape reinforcement was increased from 8 mm to 12 mm, the ductility factor, stiffness, and shear bearing capacity of arc-shaped reinforcement shear connector were improved by 174.32%, 214.76%, and 54.2%, respectively. A calculation method of shear bearing capacity was proposed by the least square method and multiple regression analysis and agreed well with the test result.

scholarly journals Experimental and Parametric Study on the Pull-Out Resistance of a Notched Perfobond Shear Connector

2019 ◽  
Vol 9 (4) ◽  
pp. 764 ◽  
Author(s):  
Shuangjie Zheng ◽  
Yuqing Liu ◽  
Yangqing Liu ◽  
Chen Zhao
Keyword(s):  
Failure Modes ◽  
Concrete Strength ◽  
Shear Connector ◽  
Test Results ◽  
Explicit Finite Element ◽  
Shear Connectors ◽  
Pull Out ◽  
Cutting Out ◽  
Circular Holes ◽  
Alternative Equation

To ease the installation of perforating rebars through multi-holes, an alternative notched perfobond shear connector was proposed by cutting out the hole edge. This paper presents the test results of six pull-out specimens with conventional and notched perfobond shear connectors. The objective was to compare the failure modes and pull-out behaviors of perfobond shear connectors using circular holes and notched holes. Furthermore, the explicit finite element method was introduced and validated to generate parametric results for pull-out tests of notched perfobond shear connectors. A total of 33 parametric simulations were performed to further study the influences of several variables, including the hole diameter, the cut width, the perfobond thickness, the concrete strength, the diameter and strength of the rebar, and the strength of the structural steel. The experimental and numerical results were used to evaluate the previous equations for perfobond shear connectors. Finally, an alternative equation was proposed to estimate the pull-out resistance of notched perfobond shear connectors.

Study on Ultimate Bearing Capacity and Anti-Slip of the Stud

2011 ◽  
Vol 99-100 ◽  
pp. 166-169
Author(s):  
Yi Min Dai ◽  
Xu Guang Yan ◽  
Jing Chen ◽  
Xiang Jun Wang
Keyword(s):  
Bearing Capacity ◽  
Test Data ◽  
Composite Structure ◽  
Concrete Strength ◽  
Composite Beams ◽  
Ultimate Bearing Capacity ◽  
Shear Connector ◽  
Shear Connectors ◽  
Stud Shear Connector ◽  
Push Out

Based on the test data of twelve push-out specimens with different holes filling different materials,the paper compared and analyzed the capacity and the corresponding slip value of the stud shear connector. The results show that, as to the two different kinds of holes shape ,the strength of the stud shear connectors of square push-out specimens was huger than that of circular specimens with the same condition; the strength of stud shear connectors in steel-concrete composite structure was decided by the strength of concrete surrounding the shear in the holes, with increasing concrete strength, the strength of stud shear connectors improved greatly; The outputs of this study are very useful for further understanding of the characteristics of the stud,it is also expected that the results presented in this paper should be valuable for the design of the composite beams.

scholarly journals Behavior of an Advanced Bolted Shear Connector in Prefabricated Steel-Concrete Composite Beams

Materials ◽  
2019 ◽  
Vol 12 (18) ◽  
pp. 2958 ◽  
Author(s):  
Jun Chen ◽  
Wei Wang ◽  
Fa-Xing Ding ◽  
Ping Xiang ◽  
Yu-Jie Yu ◽  
...  
Keyword(s):  
Composite Structures ◽  
Concrete Slab ◽  
Concrete Strength ◽  
High Strength ◽  
Fe Model ◽  
Building Structures ◽  
Shear Connector ◽  
Test Results ◽  
Shear Connectors ◽  
Bolt Pretension

The high-strength bolt shear connector in prefabricated concrete slab has advantages in applications as it reduces time during the construction of steel-concrete composite building structures and bridges. In this research, an innovative and advanced bolt shear connector in steel-concrete composite structures is proposed. To investigate the fundamental mechanical behavior and the damage form, 22 static push-off tests were conducted with consideration of different bolt dimensions, the reserved hole constraint condition, and the dimension of slab holes. A finite element (FE) model was established and verified by using test results, and then the model was utilized to investigate the influence of concrete strength, bolt dimension, yield strength, bolt pretension, as well as length-to-diameter ratio of high strength bolts on the performances of shear connectors. On the basis of FE simulation and test results, new design formulas for the calculation of shear resistance behavior were proposed, and comparisons were made with current standards, including AISC, EN 1994-1-1, GB 50017-2017, and relevant references, to check the calculation efficiency. It is confirmed that the proposed equation is in better agreement with the experimental results.

scholarly journals Investigation of the Behaviour of Steel-Concrete-Steel Sandwich Slabs with Bi-Directional Corrugated-Strip Connectors

2020 ◽  
Vol 10 (23) ◽  
pp. 8647
Author(s):  
Mansour Ghalehnovi ◽  
Mehdi Yousefi ◽  
Arash Karimipour ◽  
Jorge de Brito ◽  
Mahdi Norooziyan
Keyword(s):  
Failure Modes ◽  
Steel Plate ◽  
Lightweight Concrete ◽  
Control Sample ◽  
Shear Connector ◽  
Normal Concrete ◽  
Concrete Core ◽  
Shear Connectors ◽  
Strength Based ◽  
Good Agreement

The most researches on steel-concrete-steel (SCS) sandwich slabs are to control the cracking of concrete core along with losing weight, and shear connector type. In this study, the behaviour of SCS slabs with bi-directional corrugated-strip shear connectors (CSC) was investigated. One of the most important practical problems of CSCs in SCS slabs is lack of access for another end welding to the second steel faceplate. In this research, plug weld was proposed to provide partial welding of the other end of CSCs to a steel plate. For this reason, three slabs were manufactured using the normal concrete core as a control sample and lightweight concrete (LWC) core with and without steel fibres. The behaviour of these slabs was compared with the behaviour of SCS slabs with J-hook and stud bolt connectors from previous researches. The specimens were tested under a concentrated block load as quasi-statically. Based on the load-displacement relationship at the centre, failure modes, loading capacity, energy absorption, and ductility showed acceptable behaviour for CSC system slabs. There was also a good agreement between the ultimate flexural strength based on experiments and previous research relationships.

Push-out Test on Evaluation of Shear Strength Using Angle Shear Connectors

2019 ◽  
Vol 31 (6) ◽  
pp. 413-421 ◽  
Author(s):  
Min-Ki Lee ◽  
Kyung-Jae Shin ◽  
Jun-Seop Lee ◽  
Il-Soo Chae
Keyword(s):  
Shear Strength ◽  
Shear Connectors ◽  
Push Out

scholarly journals The Shear Strength Evaluation of the New Shear Connector by Push-out Test

2014 ◽  
Vol 14 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Sung Bae Kim ◽  
Chan Hwangbo ◽  
Tae Gyu Lee ◽  
Han Sol Cho ◽  
Sang Seup Kim
Keyword(s):  
Shear Strength ◽  
Shear Connector ◽  
Strength Evaluation ◽  
Push Out

scholarly journals Numerical Evaluation of the Perfobond (PBL) Shear Connector Subjected to Lateral Pressure Using Coupled Rigid Body Spring Model (RBSM) and Nonlinear Solid Finite Element Method (FEM)

Crystals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 743
Author(s):  
Muhammad Shoaib Karam ◽  
Yoshihito Yamamoto ◽  
Hikaru Nakamura ◽  
Taito Miura
Keyword(s):  
Shear Strength ◽  
Failure Modes ◽  
Lateral Pressure ◽  
Failure Process ◽  
Large Diameter ◽  
Analytical Investigation ◽  
Shear Connector ◽  
Shear Surface ◽  
Concrete Blocks ◽  
Concrete Damage

An analytical investigation focusing on the concrete damage progress of the PBL shear connector under the influence of various lateral pressures, employing a coupled RBSM and solid FEM model was carried out. The analytical model succeeded in simulating the test shear capacities and the failure modes adequately. The internal failure process was also clarified; the two horizontal cracks occurred near the top of the concrete dowels through the hole of the perforated steel plate, and afterward, the two vertical cracks also initiated and propagated along with the shear surface. In a low lateral pressure case, the shear strength was determined by the vertical cracks propagated along the shear surface. While as the amount of applied lateral pressure increased, the shear strength of the two vertical cracked surfaces was enhanced, and the shear strength of the PBL was characterized by the occurrence of the splitting cracks and caused the splitting failure into the side concrete blocks. Moreover, the combined effects of lateral pressure and hole diameters were also evaluated numerically, and it was found that the increase in shear strength was more in a large diameter case subjected to high lateral pressure because of the wide compressive regions generated around the concrete dowel.

EXPERIMENTAL STUDY ON SHEAR RESISTANCE EVALUATION OF PERFOBOND STRIP WITHOUT PENETRATING REBAR

2015 ◽  
Vol 2 (1) ◽  
Author(s):  
Nguyen Minh Hai ◽  
Nakajima Akinori
Keyword(s):  
Experimental Study ◽  
Concrete Block ◽  
Shear Resistance ◽  
Hybrid Structures ◽  
Shear Connector ◽  
Concrete Compressive Strength ◽  
Shear Connectors ◽  
Concrete Members ◽  
Stress Transmission ◽  
Push Out

In steel-concrete hybrid members and structures, to ensure required stress transmission between the steel and the concrete members, shear connectors are generally arranged between the two. A perfobond strip is widely used as the shear connector in various hybrid structures, and when applying the perfobond strip it is important to confirm its shear resistance. In this study, the shear resistance of the perfobond strip without the penetrating rebar is investigated experimentally by employing a simple push-out specimen. As a result, a design formula is proposed for evaluating the shear resistance of the perfobond strip, taking into account the dimensions of concrete block and the thickness of the perfobond plate, as well as the perforation diameter, and the concrete compressive strength.

Perforated FRP Shear Connector for the FRP-Concrete Composite Bridge Deck

2007 ◽  
Vol 334-335 ◽  
pp. 381-384 ◽  
Author(s):  
Jeong Hun Nam ◽  
Soon Jong Yoon ◽  
Dong Min Ok ◽  
Sun Kyu Cho
Keyword(s):  
Bridge Deck ◽  
Experimental Investigations ◽  
Shear Connector ◽  
Composite Action ◽  
Shear Connectors ◽  
Load Carrying ◽  
Composite Bridge ◽  
New Type ◽  
Composite Bridge Deck ◽  
Push Out

In recent years, the FRP-concrete composite bridge deck system has been introduced because of its light-weight and durability. The FRP-concrete composite bridge deck is composed of FRP module and concrete, and they are connected with shear connectors. In order to insure the composite action between FRP module and concrete, appropriate types of shear connector need to be installed. In this study, new type of FRP shear connector was suggested and the experimental investigations are conducted based on the studies of Perfobond. In the experimental study, the push-out test was conducted and the load carrying mechanism was analyzed including the friction effect of sand coating. Considering the load carrying mechanism of perforated shear connector under shear force, the empirical equation for the prediction of shear strength of perforated FRP shear connector was suggested.

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