scholarly journals EXPERIMENTAL INVESTIGATION OF SHEAR RESISTANCE MECHANISM OF AN RC COLUMN EXTERNALLY RETROFITTED WITH PC BARS

2017 ◽  
Vol 82 (737) ◽  
pp. 1071-1080
Author(s):  
Kozo NAKADA ◽  
Masayuki KUROKI ◽  
Tetsuo YAMAKAWA ◽  
Kenji KIKUCHI
2013 ◽  
Vol 99 (31) ◽  
pp. 139-146
Author(s):  
Kozo Nakada ◽  
Yoichi Morishita ◽  
Sanae Uehara ◽  
Tetsuo Yamakawa

1994 ◽  
Vol 59 (461) ◽  
pp. 133-142 ◽  
Author(s):  
Hitoshi SASAKI ◽  
Tsutomu KUBOTA ◽  
Akihiko MIKAME ◽  
Tetsuo YAMAMOTO ◽  
Yoshikazu KANOH

Author(s):  
Aysha M Zaneeb ◽  
Rupen Goswami ◽  
C V R Murty

An analytical method is presented to estimate lateral shear strength (and identify likely mode and location of failure) in reinforced concrete (RC) cantilever columns of rectangular cross-section under combined axial force, shear force and bending moment. Change in shear capacity of concrete with flexural demand at a section is captured explicitly and the shear resistance offered by concrete estimated; this is combined with shear resistance offered by transverse and longitudinal reinforcement bars to estimate the overall shear capacity of RC columns. Shear–moment (V-M) interaction capacity diagram of an RC column, viewed alongside the demand diagram, identifies the lateral shear strength and failure mode. These analytical estimates compare well with test data of 107 RC columns published in literature; the test data corresponds to different axial loads, transverse reinforcement ratios, longitudinal reinforcement ratios, shear span to depth ratios, and loading conditions. Also, the analytical estimates are compared with those obtained using other analytical methods reported in literature; in all cases, the proposed method gives reasonable accuracy when estimating shear capacity of RC columns.  In addition, the method provides insights into the shear resistance mechanism in RC columns under the combined action of P-V-M, and it is simple to use.


Author(s):  
N Gurumoorthy ◽  
K Rajesh Kumar ◽  
S Sivakumar ◽  
PM ChandanaVinod Kumar ◽  
R Vandhiyan

2020 ◽  
Vol 15 ◽  
pp. 155892502094645
Author(s):  
Yao Chu ◽  
Haitao Lin ◽  
Hafsa Jamshaid ◽  
Qi Zhang ◽  
Pibo Ma

Warp-knitted brush fabrics are composed of an outer surface formed by weaving the front and rear needle beds with spacer yarns interposed between them. Warp-knitted brush fabrics can be used as a non-slip cover for car seat cushions; the adhesion between non-slip fabric and car seat is related to the shear strength of warp-knitted brush fabrics. In this article, to study the factors affecting the shear force of warp-knitted brush fabrics, three different processing methods and four different stretching speed intervals were used to find the effects of stiffeners and action of different speed intervals on shear properties of fabrics. The experimental results show that the stiffener treatment can improve the shear resistance of the warp-knitted brush fabrics, and the effect of different speed intervals can affect the shear resistance of fabrics. These findings will have a guiding significance in the design and production of warp-knitted brush fabrics applied to fabrics such as car seat cushions, and the results can also help to study the shear properties of warp-knitted brush fabrics for wider applications.


2005 ◽  
Vol 32 (2) ◽  
pp. 339-351 ◽  
Author(s):  
Abdelhak Bousselham ◽  
Omar Chaallal

This paper presents results of an investigation on the shear strengthening of reinforced concrete (RC) beams with externally applied fibre reinforced polymer (FRP) composites. The first part of the study reviews and synthesizes the state of the art in the subject. Also, the requirements and recommendations specified in the Canadian CSA S806-02 standards, the American ACI-440 guidelines, as well as the European fib TG9.3 recommendations are compared with the test results reported in the literature so far. This part of the study indicates that the major parameters involved in the behaviour of RC beams strengthened in shear with FRP were not fully investigated. This can explain the observed discrepancies between the resistance values predicted by the codes and guidelines, and those obtained by tests. This has been the main impetus to carry out an experimental investigation, which is the subject of the second part of this paper. The objective of this experimental investigation was to study the influence of the following parameters on the performance of RC beams strengthened in shear with FRP composites: (i) the FRP ratio, (ii) the transverse steel reinforcement ratio, and (iii) the type of beam (deep versus slender). Results clearly showed the interaction between the FRP composite and the internal transverse steel reinforcement in the shear resistance mechanism. Results also showed the influence of the type of beam on the gain due to FRP on the carrying capacity of the beam.Key words: shear, reinforcement, concrete, composites, experimental, parameters.


2002 ◽  
Vol 29 (6) ◽  
pp. 911-918 ◽  
Author(s):  
Craig Giaccio ◽  
Riadh Al-Mahaidi ◽  
Geoff Taplin

This paper presents results of an experimental investigation into the effect of flange geometry on the shear strength of point-loaded, reinforced concrete T-beams. A procedure to normalise the ultimate strength and calculate a concrete contribution is implemented. This is used to discuss the effect of varying the ratio of flange width to web width and the ratio of flange depth to effective depth on the shear strength of a reinforced concrete T-beam. An increase in the ratio of flange width to web width is shown to produce an accompanying increase in the ultimate strength of a reinforced concrete T-beam, providing the ratio of flange depth to effective depth is above a certain minimum value. This increase in shear resistance with an increase in the ratio of flange width to web width continues until the flange is wide enough to allow formation of a failure mechanism whereby the load point punches through the flange.Key words: shear, T-beams, flange, reinforcing, strength, failure mechanisms.


2017 ◽  
Vol 133 ◽  
pp. 125-140 ◽  
Author(s):  
Nasrin Bakhshayesh Eghbali ◽  
Seyed Rasoul Mirghaderi

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