Test Methods for In Situ Measurement of Masonry Mortar Joint Shear Strength Index

One of the greatest drawbacks to predicting the behaviour of bonded joints has been the lack of reliable data on the mechanical properties of adhesives. In this study, methods for determining mechanical properties of structural adhesive were discussed. The Young’s modulus, Poisson’s ratio and tensile strength of the adhesive were tested by dogbone specimens (bulk form) and butt joint specimens (in situ form). The shear modulus and shear strength were test by V-notched specimens (bulk form) and thick adherend lap-shear (TALS) joint specimens (in situ form). The test results show that the elastic modulus provided by the manufacturer is too low, the dogbone specimen is better than the butt joint specimen to test the tensile strength and elastic modulus and the TALS joint specimen is better than the V-notched specimen to test the shear strength.

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Exterior RC joints subjected to monotonic and cyclic loading

Engineering Computations ◽

10.1108/ec-06-2019-0269 ◽

2020 ◽

Vol 37 (7) ◽

pp. 2319-2336 ◽

Cited By ~ 1

Author(s):

Yasmin Murad ◽

Haneen Abdel-Jabar ◽

Amjad Diab ◽

Husam Abu Hajar

Keyword(s):

Shear Strength ◽

Cyclic Loading ◽

Axial Load ◽

Monotonic Loading ◽

Concrete Compressive Strength ◽

Joint Shear Strength ◽

Content Type ◽

Loading Case ◽

Joint Shear ◽

Test Points

Purpose The purpose of this study is to develop two empirical models that predict the shear strength of exterior beam-column joints exposed to monotonic and cyclic loading using Gene expression programming (GEP). Design/methodology/approach The GEP model developed for the monotonic loading case is trained and validated using 81 data test points and that for cyclic loading case is trained and validated using 159 data test points that collected from different 9 and 39 experimental programs, respectively. The parameters that are selected to develop the cyclic GEP model are concrete compressive strength, joint aspect ratio, column axial load and joint transverse reinforcement. The monotonic GEP model is developed using concrete compressive strength, column depth, joint width and column axial load. Findings GEP models are proposed in this paper to predict the joint shear strength of beam-column joints under cyclic and monotonic loading. The predicted results obtained using the GEP models are compared to those calculated using the ACI-352 code formulations. A sensitivity analysis is also performed to further validate the GEP models. Originality/value The proposed GEP models provide an accurate prediction for joint shear strength of beam-column joints under cyclic and monotonic loading that is more fitting to the experimental database than the ACI-352 predictions where the GEP models have higher R2 value than the code formulations.

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Joint shear strength of FRP reinforced concrete beam-column joints

Open Engineering ◽

10.2478/s13531-011-0009-6 ◽

2011 ◽

Vol 1 (1) ◽

Cited By ~ 3

Author(s):

Jagadeesan Saravanan ◽

Ganapathy Kumaran

Keyword(s):

Shear Strength ◽

Concrete Beam ◽

Concrete Strength ◽

Reinforced Concrete Beam ◽

Constant Load ◽

Reinforcement Ratio ◽

Joint Shear Strength ◽

Element Analysis ◽

Glass Fibre Reinforced Polymer ◽

Joint Shear

AbstractAn assessment of the joint shear strength of exterior concrete beam-column joints reinforced internally with Glass Fibre Reinforced Polymer (GFRP) reinforcements under monotonically increasing load on beams keeping constant load on columns is carried out in this study. Totally eighteen numbers of specimens are cast and tested for different parametric conditions like beam longitudinal reinforcement ratio, concrete strength, column reinforcement ratio, joint aspect ratio and influence of the joint stirrups at the joint. Also finite element analysis is performed to simulate the behaviour of the beam-column joints under various parametric conditions. Based on this study, a modified design equation is proposed for assessing the joint shear strength of the GFRP reinforced beam-column specimens based on the experimental results and the review of the prevailing design equations.

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