BRITTLE FRACTURE INITIATION CHARACTERISTICS IN HEAT AFFECTED ZONE OF GAS PRESSURE WELDED JOINTS OF REINFORCING STEEL BARS : Experimental study on brittle fracture initiation characteristics of gas pressure welded joints of reinforcing steel bars at low temperatures. (II)

1984 ◽  
Vol 346 (0) ◽  
pp. 20-31
Author(s):  
MORIHISA FUJIMOTO ◽  
TOSHIAKI FUJIMORI ◽  
TADAO NAKAGOMI ◽  
YOSHITAKA YABE
Keyword(s):  
Experimental Study ◽  
Brittle Fracture ◽  
Heat Affected Zone ◽  
Welded Joints ◽  
Low Temperatures ◽  
Fracture Initiation ◽  
Gas Pressure ◽  
Reinforcing Steel ◽  
Steel Bars

An ultrasonic testing method for gas pressure welded joints of reinforcing steel bars

Ultrasonics ◽  
1985 ◽  
Vol 23 (3) ◽  
pp. 119-127 ◽  
Author(s):  
T. Saito ◽  
Y. Yabe ◽  
T. Fujimori
Keyword(s):  
Welded Joints ◽  
Ultrasonic Testing ◽  
Gas Pressure ◽  
Reinforcing Steel ◽  
Testing Method ◽  
Steel Bars

Experimental Study on Flexural Behavior of Reinforced Concrete Beams with Variety Lap Splices of Reinforcing Steel Bars

2016 ◽  
Vol 845 ◽  
pp. 132-139
Author(s):  
Mochamad Teguh ◽  
Novia Mahlisani
Keyword(s):  
Experimental Study ◽  
Reinforced Concrete ◽  
Concrete Beams ◽  
Reinforced Concrete Beams ◽  
Flexural Behavior ◽  
Reinforced Concrete Structures ◽  
Reinforcing Steel ◽  
Reinforcing Bars ◽  
Lap Splices ◽  
Steel Bars

The limited lengths of reinforcing bars have been commonly found in the practical construction of most reinforced concrete structures. The required length of a bar may be longer than the available stock of steel length. For maintaining desired continuity of the reinforcement in almost all reinforced concrete structures, some reinforcing bars should be carefully spliced. In the case of long flexural beam, bar installers end up with two or even more pieces of steel that must be spliced together to accomplish the desired steel length. An experimental study was conducted to investigate flexural behavior of reinforced concrete beams utilizing a variety lap splices of reinforcing steel bars under two-point loading. Five variations of lap splices of reinforcing steel bars positioned at midspan of tensile reinforcement of the beam were investigated. Welded joints and overlapped splices were used to construct the variation of lap splices of reinforcing steel bars. The general trend in crack pattern, the load deflection characteristics and the mode of failure of flexural beams under two-point loading were also observed. The flexural strength comprising load-displacement response, flexural crack propagation, displacement ductility is briefly discussed in this paper.

Safety Assessment of Steels and Welds Under Cyclic and Monotonic Loadings at Low Temperatures

1984 ◽  
Vol 106 (4) ◽  
pp. 473-479
Author(s):  
N. Urabe ◽  
A. Yoshitake ◽  
H. Kagawa
Keyword(s):  
Fracture Toughness ◽  
Fatigue Life ◽  
Brittle Fracture ◽  
Low Temperatures ◽  
Safety Assessment ◽  
Loading Rate ◽  
Fracture Initiation ◽  
Fatigue Tests ◽  
Loading Rates ◽  
Wide Range

In order to investigate the mechanisms and the factors to govern the brittle fracture initiation during the fatigue crack propagation at low temperatures, fracture toughness tests under wide range of loading rates, fatigue tests at low temperatures and fracture toughness tests after having been given pre-loading were performed on steels and weld junctions. The fatigue fracture toughness Kfc was estimated as equivalent as the fracture toughness Kc under the monotonic tensile loading if they were compared at the same loading rate, since the residual stress due to the cyclic loading was less effective on the brittle fracture initiation. The calculated fatigue life based on Paris’s formula taken into consideration of the crack closure phenomena showed a good one-by-one agreement with the observed fatigue life up to the brittle fracture initiation. Therefore, a design curve was preliminarily drawn to determine the fatigue life at low temperatures.

A Study of Brittle Fracture Initiation for 9% Ni Steel Welded Joints

1975 ◽  
Vol 1975 (138) ◽  
pp. 434-443
Author(s):  
Masahiro Toyosada ◽  
Tosiyuki Kunihiro ◽  
Yukimasa Kuwabe ◽  
Yosiaki Kawaguchi
Keyword(s):  
Brittle Fracture ◽  
Welded Joints ◽  
Fracture Initiation
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