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Effect of openings and shear bolt pattern in seismic retrofit of reinforced concrete slab–column connectio

Effect of openings and shear bolt pattern in seismic retrofit of reinforced concrete... Bu, Wensheng; Polak, Maria Anna 2011-12-01 00:00:00 This study addresses seismic retrofit of reinforced concrete flat slab–column connections against punching shear failure. The tested slabs are retrofitted using shear bolts.

Retrofit of Slab Column Interior Connections Using Shear .

Shear bolts are a new type of reinforcement developed for punching shear strengthening and retrofit of existing slab-column connections. The shear bolt consists of a headed vertical rod threaded ...

Design Considerations for Shear Bolts in Punching Shear .

Several researchers recognized the need for the development of the punching shear strengthening method. Ghali et al. (1974) provided shear retrofit by introducing transverse prestressing to the slab area. High-strength prestressing steel bolts and large anchor plates were used in this application. Ebead and Marzouk (2002) used solid steel plates on both sides of the slabs, which were then ...

(PDF) Punching Shear Retrofit Method Using Shear Bolts for .

pdf. Punching Shear Retrofit Method Using Shear Bolts for Reinforced Concrete Slabs under Seismic Loading. ... Punching Shear Retrofit Method Using Shear Bolts for Reinforced Concrete Slabs under Seismic Loading. Download. Punching Shear Retrofit Method Using Shear Bolts for Reinforced Concrete Slabs under Seismic Loading.

Application of FRP for punching shear retrofit of concrete .

with the aluminum fittings. Using this approach, fairly large loads can be resisted by the end-fittings. The de-veloped FRP bolts worked very well improving the performance of the slab-column connections and showing the benefits of using FRP in punching shear retrofit of reinforced concrete slabs. 1 INTRODUCTION

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Punching Shear Retrofit Method Using Shear Bolts for Reinforced Concrete Slabs under Seismic Loading more. by listanto est. Download (.pdf) Save to Library • Punching Shear Retrofit Method Using Shear Bolts for Reinforced Concrete Slabs under Seismic Loading more. by listanto est.

Usage of prestressed vertical bolts for retrofitting flat .

An experimental investigation with the objective of retrofitting flat slabs damaged due to punching shear using prestressed vertical bolts is presented in this paper. The parameters examined in this study are vertical prestressed bolts with different ratios within the slab thickness, slab thickness and central column size.

DESIGN OF ANCHOR BOLTS EMBEDDED IN CONCRETE MASONRY .

allowable tension and shear loads is illustrated in Figure 5. STRENGTH DESIGN OF ANCHOR BOLTS pt The design provisions for anchor bolts using the strength design method is nearly identical to that used for allowable stress design, with appropriate revisions to convert the requirements to produce nominal axial tension and shear design strengths.

A NEW CFRP STRENGTHENING TECHNIQUE TO ENHANCE PUNCHING .

A NEW CFRP STRENGTHENING TECHNIQUE TO ENHANCE PUNCHING SHEAR STRENGTH OF RC SLAB-COLUMN CONNECTIONS ... The effect of combination of shear bolts and CFRP material on punching shear capacity of the flat ... In this study, we propose a new method to install FRPs as shear reinforcement that can reduce the workmanship and save from

Screw Anchors Used as Post-Installed Shear Reinforcement .

More restrictive requirements of new codes, increasing of imposed loads connected with usage change of the existing structures, errors in design process or during execution can lead to necessity of the strengthening of the existing buildings. In paper, the new and modern strengthening system of flat slabs against punching shear using screw anchors is presented.

STRENGTHENING OF FLAT SLABS WITH TRANSVERSE REINFORCEME

Keywords: Punching, Flat Slabs, Strengthening. Summary: This paper describes the experimental research carried out to study a strengthening method for flat slabs under punching using transversal shear reinforcement in the form steel bolts. 1 INTRODUCTION In flat slabs the force and moments transferred between the slab and the column cause high ...

Design Considerations for Shear Bolts in Punching Shear .

The developed FRP bolts worked very well in improving the performance of the slab-column connections and showing the benefits of using FRP in punching shear retrofit of reinforced concrete slabs ...

(PDF) Punching Shear Retrofit Method Using Shear Bolts for .

Punching Shear Retrofit Method Using Shear Bolts for Reinforced Concrete Slabs under Seismic Loading. Listanto Est. Download with Google Download with Facebook or download with email. Punching Shear Retrofit Method Using Shear Bolts for Reinforced Concrete Slabs under Seismic Loading. Download. ... Download pdf × Close Log In. Log In ...

Punching Shear Strength of Reinforced Concrete Slabs .

punching shear strength of approximately 43%. Punching shear strength as function of slab rotation The opening of the critical shear crack reduces the strength of the inclined concrete compression strut carrying shear and eventually leads to the punching shear failure. According to Muttoni and Schwartz,12 the width of the critical crack can

Seismic Upgrade of Slab-Column Connections Using Carbon .

This study investigates the application of a seismic upgrade method to increase punching shear and deformation capacity of slab-column connections using CFRPs. CFRP strips bonded to concrete in the vertical direction using epoxy are utilized as shear reinforcement around the connection area. This

Concentric Punching Shear Strength of Reinforced Concrete .

formula to calculate the punching shear strength of flat plates with good accuracy for a wide range of slab thicknesses, tensile reinforcement ratios, and concrete compressive strengths. In this method, it is assumed that punching shear failure occurs due to the crushing of the critical concrete strut adjacent to the column.

Structural Analysis Methods for the Assessment of .

Structural Analysis Methods for the Assessment of Reinforced Concrete Slabs . JIANGPENG SHU . ISBN: 978-91-7597-584-9 ... Structural Analysis Methods for the Assessment of Reinforced Concrete Slabs . JIANGPENG SHU . ... and especially to shear and punching failure. The selected modelling choices, within five major

Usage of prestressed vertical bolts for retrofitting flat .

ing shear using prestressed vertical bolts is presented in this paper. The parameters examined in this ... et al. [15] described a new shear strengthen method for existing flat slabs by the addition of externally tightened shear bolts ... Figs. 1 and 2. For specimen NR(40)-6, 8 bolts were used as punching shear reinforcement, Fig. 2a, while ...

What is Punching Shear? Punching Shear in Flat Slabs .

Punching shear is a phenomenon in flat slabs caused by concentrated support reactions inducing a cone shaped perforation starting from the top surface of the slab. Although generally preceded by flexural failure, punching shear is a brittle failure mode and the risk of progressive collapse requires a higher safety class in structural design.. Punching Shear Design

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Punching Shear Retrofit Method Using Shear Bolts for Reinforced Concrete Slabs under Seismic Loading more. by listanto est. Download (.pdf) Save to Library • Punching Shear Retrofit Method Using Shear Bolts for Reinforced Concrete Slabs under Seismic Loading more. by listanto est. Download (.pdf) Save to Library-by 30-day views-total views ...

Finite element analysis of punching shear of concrete .

Read "Finite element analysis of punching shear of concrete slabs using damaged plasticity model in ABAQUS, Engineering Structures" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.