Installation of a large diameter reinforced concrete pipe by jacking methods

1996 ◽  
Vol 33 (7) ◽  
pp. A329
Keyword(s):  
Reinforced Concrete ◽  
Large Diameter ◽  
Concrete Pipe

Centrifuge testing to simulate buried reinforced concrete pipe joints subjected to traffic loading

2015 ◽  
Vol 52 (11) ◽  
pp. 1762-1774 ◽  
Author(s):  
Boris Rakitin ◽  
Ming Xu
Keyword(s):  
Reinforced Concrete ◽  
Large Diameter ◽  
Traffic Load ◽  
Surface Loading ◽  
Traffic Loading ◽  
Centrifuge Testing ◽  
Geotechnical Centrifuge ◽  
State Highway ◽  
Concrete Pipe ◽  
The Right

Pipeline water leakage has become a serious problem in many countries. It has been widely noted that most of the damage to the pipelines occurs in the joints where two pipes are connected to each other. This paper presents the results of a geotechnical centrifuge testing program in which the response of a 12 m long (in prototype scale) large-diameter reinforced concrete pipeline with gasketed bell-and-spigot joints subjected to three standard American Association of State Highway and Transportation Officials design load configurations has been investigated. The results show that most vertical pipe movements occurred during the first 10 cycles of traffic loading. Under design tandem loading, the pipe joint displacements were significantly higher than those under the other two traffic load configurations. An increase of soil cover depth resulted in a reduced influence of surface loading, the effect of which was the most significant for two single pairs of wheels of design trucks in passing mode. Furthermore, two pipes on the left side and two pipes on the right side from the tested joint were influenced significantly by the surface loading, while the pipeline movements were not symmetrical. Although the joint directly under the load experienced the largest rotation, the possibility of leakage in the second joint in the spigot-to-bell direction was also high, due to large differential displacement between the pipes.

Distress of a Large Diameter Underground Reinforced Concrete Shaft

2017 ◽  
Author(s):  
Yazen A. Khasawneh ◽  
Aslam A. Al-Omari ◽  
Abdulla A. Sharo
Keyword(s):  
Reinforced Concrete ◽  
Large Diameter

Lap Weld Strength of Reinforced Concrete Pipe Cages

2017 ◽  
pp. 1-17
Author(s):  
George Hand ◽  
David Schnerch ◽  
Kimberly L. Spahn
Keyword(s):  
Reinforced Concrete ◽  
Weld Strength ◽  
Concrete Pipe

Experimental development of the design of an expansion joint for a large-diameter reinforced-concrete pipeline

1988 ◽  
Vol 22 (3) ◽  
pp. 163-166 ◽  
Author(s):  
V. N. Zaitsev ◽  
O. V. Mikhailov ◽  
S. A. Berezinskii ◽  
V. V. Lgalov ◽  
O. B. Lyapin
Keyword(s):  
Reinforced Concrete ◽  
Large Diameter ◽  
Expansion Joint ◽  
Experimental Development

Guidelines for flexural design of FRP reinforced concrete beams

2020 ◽  
pp. 002199832097373
Author(s):  
Fares Jnaid
Keyword(s):  
Compressive Strength ◽  
Reinforced Concrete ◽  
Carrying Capacity ◽  
Concrete Beams ◽  
Large Diameter ◽  
Reinforced Concrete Beams ◽  
Load Carrying Capacity ◽  
Concrete Compressive Strength ◽  
Load Carrying ◽  
Multiple Variables

This paper investigates the effects of different parameters on the live load carrying capacity of concrete beams reinforced with FRP bars. The author performed a parametric study utilizing an innovative numerical approach to inspect the effects of multiple variables such as reinforcement ratio, concrete compressive strength, span to depth ratio, FRP type, and bar diameter on load carrying capacity of FRP reinforced concrete beams. This study concluded that unless the span to height ratio is smaller than 8, tension-controlled sections are impractical as they do not meet code requirements for serviceability. In addition, it is recommended to use higher reinforcement ratios when using larger span to depth ratios and/or when using CFRP reinforcing bars. Moreover, larger number of bars with small diameter is more practical than fewer large diameter bars. Furthermore, this research suggests that increasing the concrete compressive strength is associated with a significant increase in the ultimate flexural capacity of FRP reinforced beams.

A new test method for evaluating the long-term performance of fiber-reinforced concrete pipes

2019 ◽  
Vol 23 (7) ◽  
pp. 1336-1349 ◽  
Author(s):  
Fouad T Al Rikabi ◽  
Shad M Sargand ◽  
Issam Khoury ◽  
John Kurdziel
Keyword(s):  
Finite Element ◽  
Reinforced Concrete ◽  
Steel Reinforcement ◽  
Fiber Reinforced Concrete ◽  
Synthetic Fiber ◽  
Concrete Pipes ◽  
Concrete Pipe ◽  
Long Term Performance ◽  
Term Performance

Synthetic fibers have been used recently to minimize the need for steel reinforcement in the concrete pipe to enhance their ductility. However, synthetic fiber has properties that may change over time due to its viscoelastic behavior. The objective of this study is to investigate the long-term performance of fiber-reinforced concrete pipes using a new test frame. A three-dimensional finite element model was created for the long-term testing frame to ensure its compliance with the American Society for Testing and Materials requirement. The finite element results showed that the testing frame successfully transferred the load to the concrete as the pipe cracked at the location where high flexural stresses are expected. Concrete pipe reinforced with synthetic fiber dosage of 9 kg/m3 along the steel reinforcement area of 5.7 cm2/m was tested to evaluate the concrete pipe system performance. The pipe was tested under two load stages for 120 days each. Load stages 1 and 2 included applying 40% and 70% of the ultimate load obtained by the authors in a previous study, respectively. The strain and deflection increased linearly within 5 days of applying the load and then leveled off. The pipe showed a slight increase in the crack width and deflection, indicating that fiber creep did not have a significant impact on the long-term performance of the concrete pipe. Also, it was observed that strain values surpassed those for plain concrete material, suggesting that including synthetic fiber in the concrete pipe mix enhanced the pipe ductility.

scholarly journals Analytical Evaluation of Reinforced Concrete Pier and Cast-in-Steel-Shell Pile Connection Behavior considering Steel-Concrete Interface

2016 ◽  
Vol 2016 ◽  
pp. 1-14 ◽  
Author(s):  
Jiho Moon ◽  
Dawn E. Lehman ◽  
Charles W. Roeder ◽  
Hak-Eun Lee ◽  
Tae-Hyung Lee
Keyword(s):  
Reinforced Concrete ◽  
Large Diameter ◽  
Structural Behavior ◽  
Steel Shell ◽  
Fe Model ◽  
Fe Method ◽  
Design Guideline ◽  
Composite Action ◽  
Embedment Length ◽  
The Cost

The seismic design of bridges may require a large-diameter deep pile foundation such as a cast-in-steel-shell (CISS) pile where a reinforced concrete (RC) member is cast in a steel casing. In practice, the steel casing is not considered in the structural design and the pile is assumed to be an RC member. It is partially attributed to the difficulties in evaluation of composite action of a CISS pile. However, by considering benefits provided by composite action of the infilled concrete and the steel casing, both the cost and size of CISS pile can be reduced. In this study, the structural behavior of the RC pier and the CISS pile connection is simulated by using an advanced 3D finite element (FE) method, where the interface between the steel and concrete is also modeled. Firstly, the FE model is verified. Then, the parametric study is conducted. The analysis results suggest that the embedment length and the friction coefficient between the steel casing and the infilled concrete affect the structural behavior of the RC pier. Finally, the minimum embedment length with reference to the AASHTO design guideline is suggested considering the composite action of the CISS pile.

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