scholarly journals EXPERIMENTAL INVESTIGATION OF PULL OUT STRENGTH OF FLEXIBLE TIES IN THIN BRICK VENEER LAYER

2020 ◽  
Vol 11 (4) ◽  
pp. 114-118
Author(s):  
Robertas Zavalis ◽  
Bronius Jonaitis
Keyword(s):  
Experimental Investigation ◽  
Experimental Research ◽  
Experimental Test ◽  
Brick Masonry ◽  
Test Results ◽  
Pull Out ◽  
Building Facades ◽  
Brick Veneer ◽  
Flexible Metal ◽  
Pull Out Strength

The use of thin brick veneer layers for building facades becomes more popular nowadays. Using thin bricks (50−65 mm thick) instead of normal 100−120 mm thick bricks let us to save expenses up to 50% related to materials. The connection of thin veneer layer with inner construction wall must be assured. Usually, the connection is fulfilled using flexible metal or composite ties. The main issue for this connection is tie pull out strength from thin brick masonry. This strength depends on type and construction of ties and it governs the number of ties need for facades. This article describes experimental research of pull out strength of flexible steel ties in thin brick masonry. Two possible anchoring types were used. Experimental test results and analysis are described in the article.

PULL OUT STRENGTH FOR DIFFERENT SIZE OF DOWEL AND GRAIN DIRECTION OF GLULAM

2016 ◽  
Vol 78 (5-4) ◽  
Author(s):  
Tengku Anita Raja Hussin ◽  
Mohamad Iswandi Jinne ◽  
Rohana Hassan
Keyword(s):  
Failure Modes ◽  
Maximum Load ◽  
Experimental Program ◽  
Drilling Process ◽  
Test Results ◽  
Bond Behaviour ◽  
Pull Out ◽  
Timber Joints ◽  
Different Thickness ◽  
Pull Out Strength

This paper presents an experimental program for testing glued-in dowel glulam timber joints. Hundred thirty glulam specimens, each with a single glued-in rebar parallel to the grain and perpendicular to grain with different size of dowels 12mm, 16mm and 20mm were tested to evaluate the effects of anchorage length and different dowel diameter for parallel and perpendicular to the grain on pull-out strength and bond behaviour of glued-in rebar timber joints. The test results showed that the maximum load for specimen with dowel glued-in parallel to the grain given the higher maximum load than dowel glued-in perpendicular to the grain direction. Failure modes were characterized by pull out failure in the mode of adhesive-dowel, yet one sample failed in timber-adhesive mode. This might happened because the surface of the timber was burned by drilling machine during the drilling process. The pull-out was tested with different thickness grain direction with different dowel size with a rate of 2mm/min and the failure modes were observed after the testing of pull-out test. PRF is the adhesive used for the strengthening purposes. Resistance to the withdrawal of dowels glued-in perpendicularly was 44.2% to 53.5 % lower than that obtained for dowels glued-in parallel to the grain direction. The result shows that the dowel glued-in parallel to the grain given the higher maximum load than dowel glued-in perpendicular to the grain direction.

scholarly journals Experimental Investigation on Pull-out Strength of Pre- and Post-Installed GFRP bars for Bridge Barrier Construction

2021 ◽  
Author(s):  
Alireza Abolghasem
Keyword(s):  
Experimental Investigation ◽  
Bridge Deck ◽  
Pullout Capacity ◽  
Pullout Strength ◽  
Research Information ◽  
Gfrp Bars ◽  
Pull Out ◽  
Design Values ◽  
Experimental Findings ◽  
Pull Out Strength

This study aims at providing research information on the pullout capacity of straight and headed-end GFRP bars embedded in bridge deck slab as pre-installed anchors for new bridge barrier-deck construction and as post-installed anchors for the replacement of deteriorated bridge barriers. In Phase I of this research, the pullout capacity of pre-installed ribbed-surface GFRP bars in twin- and triple-bar groups were investigated experimentally, considering different bar size, spacing and embedment depths. In phase II of this research, the pullout capacity of post-installed sand-coated and ribbed-surface GFRP bars were investigated experimentally considering different bar size and embedment depths and adhesive types. The experimental findings were compared with available experimental results and pullout formulas. Design values for the pullout strength of the GFRP bars as pre- and post-installed anchors in concrete were deduced.

scholarly journals Experimental Investigation into Pull-Out Strength of Foamed Concrete Using Different Types of Screw

2014 ◽  
Vol 15 ◽  
pp. 01031 ◽  
Author(s):  
M.A. Othuman Mydin ◽  
N. Noordin ◽  
Z. Matori ◽  
N. Md Sani ◽  
N.F. Zahari
Keyword(s):  
Experimental Investigation ◽  
Pull Out ◽  
Different Types ◽  
Foamed Concrete ◽  
Pull Out Strength

Integrity of Roller Expanded Tube-to-Tubesheet Joints With Over-Enlarged Tubesheet Holes

2006 ◽  
Author(s):  
A. N. Shuaib ◽  
N. Merah ◽  
M. Ahmed ◽  
Y. N. Al-Nassar ◽  
S. S. Al-Anizi
Keyword(s):  
Experimental Investigation ◽  
Heat Exchanger ◽  
Joint Strength ◽  
Metal Contact ◽  
Test Results ◽  
Pull Out ◽  
Increasing Trend ◽  
Initial Clearance ◽  
Joint Integrity ◽  
Design Pressure

This paper presents the results of an experimental investigation conducted to evaluate the effect of initial tube-tubesheet diametral clearance on the integrity of roller expanded tube-to-tubesheet joints in over enlarged tubesheet holes. The criteria of evaluating joint integrity include the pull out force and hydraulic tightness of the joints in which tubes were expanded to 5% wall reduction after metal to metal contact of the tube with the tubesheet hole. The levels of clearance investigated were selected to cover a range that exceeded by ten times that prescribed by the Tubular Exchangers Manufacturers Association (TEMA) standards [1]. The pull out test results showed that, within the investigated range of clearance, the joint strength has not declined below the strength of joints with clearance levels within the TEMA range. In fact the pull out force exhibited a slight linear increasing trend with the increase in initial clearance, which is attributed to the effect of tube strain hardening. The hydro test results indicated that all joints within the investigated clearance levels were hydraulically tight when they were tested at 1.5 times the design pressure of the heat exchanger for duration of 30 minutes. A relationship between rolling specific energy and initial joint clearance has been developed.

scholarly journals Experimental Investigation on Pull-out Strength of Pre- and Post-Installed GFRP bars for Bridge Barrier Construction

2021 ◽  
Author(s):  
Alireza Abolghasem
Keyword(s):  
Experimental Investigation ◽  
Bridge Deck ◽  
Pullout Capacity ◽  
Pullout Strength ◽  
Research Information ◽  
Gfrp Bars ◽  
Pull Out ◽  
Design Values ◽  
Experimental Findings ◽  
Pull Out Strength

This study aims at providing research information on the pullout capacity of straight and headed-end GFRP bars embedded in bridge deck slab as pre-installed anchors for new bridge barrier-deck construction and as post-installed anchors for the replacement of deteriorated bridge barriers. In Phase I of this research, the pullout capacity of pre-installed ribbed-surface GFRP bars in twin- and triple-bar groups were investigated experimentally, considering different bar size, spacing and embedment depths. In phase II of this research, the pullout capacity of post-installed sand-coated and ribbed-surface GFRP bars were investigated experimentally considering different bar size and embedment depths and adhesive types. The experimental findings were compared with available experimental results and pullout formulas. Design values for the pullout strength of the GFRP bars as pre- and post-installed anchors in concrete were deduced.

Experimental Investigation on Rubber-Expanded Tube-to-Tubesheet Joints of Zr Heat Exchangers

2008 ◽  
Author(s):  
Biao Yuan ◽  
Ying Zhi Wang ◽  
Xin Ma ◽  
Shan-Tung Tu ◽  
Yan-An Xi ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Heat Exchangers ◽  
Joint Strength ◽  
Operating Temperature ◽  
Experimental Results ◽  
Experimental Conditions ◽  
Working Temperature ◽  
Pull Out ◽  
Sealing Performance ◽  
Pull Out Strength

Mechanics of flexible expansion was expounded, and technology points of uniform rubber expanding in tube-to-tubesheet joints of Zirconium (Zr) heat exchangers were introduced. A series of pull-out strength and tightness experiments were performed for rubber-expanded tube-to-tubesheet joints. The experimental results show that the pull-out strength decreases linearly with increasing of operating temperature in the range of 20∼300°C, the pull-out strength of joints composed of Zr tubes attached to 16MnR and 316L tubesheets (abbreviated as Zr/16MnR and Zr/316L joints and heat exchangers include these joints are called Zr heat exchangers) drops much faster than that of joints composed of Titanium (Ti) tubes attached to 16MnR tubesheets (abbreviated as Ti/16MnR joints), and the joint strength can meet the requirements specified in Chinese code & standard at the experimental conditions. It is also found that the tightness of rubber expanded tube-to-tubesheet joints drops obviously with the increase of working temperature from 20 to 200°C, and the sealing performance of the joints enhances markedly when rubber-expanded tube-to-tubesheet joints are subsequently expanded with roller. Moreover, the influences of Enlargement Rate of Tubesheet Hole (ERTH) on the strength of rubber-expanded tube-to-tubesheet joints is discussed, it is observed that the pull-out strength of the connection joints with non-grooved tubesheet holes increases linearly with increasing of ERTH when the expanding pressure is not larger than 38 MPa, whereas this is not the case for the joint with grooved tubesheet holes.

scholarly journals Experimental Investigation on Punching Behavior of Thick Reinforced Concrete Slabs

2013 ◽  
Vol 59 (2) ◽  
pp. 157-174 ◽  
Author(s):  
T. Urban ◽  
M. Gołdyn ◽  
J. Krakowski ◽  
Ł. Krawczyk
Keyword(s):  
Experimental Investigation ◽  
Reinforced Concrete ◽  
Experimental Test ◽  
Concrete Slabs ◽  
Shear Stresses ◽  
Test Results ◽  
Reinforced Concrete Slabs ◽  
Eurocode 2

Abstract The results of experimental test of nine thickset reinforced concrete slabs in punching are presented in the this paper. The aim of the tests was verification of the Eurocode EC 2 procedure, by which the ultimate shear stresses vRd,c depend on the slenderness of the slab. Besides of the performed tests results, the analysis of the foreign investigation of the fundaments is also included. The test results, as well as other tests, show the correctness of the function assumed in Eurocode 2, which gives correlation between ultimate stresses vRd,c and shear slenderness.

Pull-Out Strength of Screws in Screw Chases: Part 1

2016 ◽  
Vol 710 ◽  
pp. 115-120
Author(s):  
James C. LaBelle ◽  
J. Randolph Kissell ◽  
Tanya A. Dolby
Keyword(s):  
Stainless Steel ◽  
Cross Section ◽  
Wind Load ◽  
Test Results ◽  
Pull Out ◽  
Stainless Steel Screws ◽  
Screw Threads ◽  
Aluminum Profiles ◽  
Pull Out Strength

This paper presents test results and a proposed pull-out strength equation for tension-loaded screws installed in chases in extruded aluminum profiles. The screws are perpendicular to the extrusion's length. This connection is commonly used to resist outward wind load on glass in curtain walls and skylights. Two types of chase, each with 1/4 in. (6.35 mm) diameter 300 series stainless steel screws were used: a flat chase with AB tapping screws (1/4-14; 14 threads per 25.4 mm) and F tapping screws (1/4-20; 20 threads per 25.4 mm), and a longitudinally ribbed chase with UNC-thread machine screws (1/4-20). The extrusions included six cross-section shapes (three with flat chases and three with ribbed chases) and three alloy-tempers. Pull-out tests of 150 single screws were conducted. The Aluminum Design Manual [1] does not include pull-out strength equations for screws in chases; this research was intended to develop such equations. Pull-out strength increased with an increase in engaged length of screw threads with the chase. The shape and dimensions of the chase also affected the pull-out strength.

Advanced railgun experimental test results and implications for the future

1992 ◽  
Author(s):  
M. HOLLAND ◽  
P. EGGERS ◽  
S. GUINTO ◽  
R. STEVENSON ◽  
GREGORY COLOMBO
Keyword(s):  
Experimental Test ◽  
Test Results ◽  
The Future
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