A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Hydrostatic Pressure Testing of Prestressed Concrete Cylinder Pipe with Broken Wires
This paper presents the results of four hydrostatic pressure tests performed on prestressed concrete cylinder pipe (PCCP), embedded-cylinder type, with broken wires. Two of the pipes tested were new 66-in. pipe cast for the purpose of testing two months earlier. The other two pipes were removed from a line after Remote Field Eddy Current/Transformer Coupling showed broken wires due to hydrogen embrittlement resulting from high voltage of the cathodic protection system. In the first two pipes, broken wires were induced by (1) cutting and removing the wires over a 4-ft length of the pipe from the entire pipe circumference and (2) by cutting the wires over a 4-ft length along a line. The first pipe removed from the line had 45 broken wires and was tested to failure. In testing the second pipe, 36 additional wires were cut. The results showed the failure modes of PCCP with broken wires. They also showed that the strength of PCCP with broken wires is in fact much greater than the strength of steel cylinder. The additional strength is derived from the block arching strength of cracked concrete. The paper presents the test results and the conclusions for comparison with finite elements and simplified analyses, performed as parts of the risk analysis of pipes with broken wires when subjected to the combined effects of internal pressure and earthload and pipe and fluid weights.
Hydrostatic Pressure Testing of Prestressed Concrete Cylinder Pipe with Broken Wires
This paper presents the results of four hydrostatic pressure tests performed on prestressed concrete cylinder pipe (PCCP), embedded-cylinder type, with broken wires. Two of the pipes tested were new 66-in. pipe cast for the purpose of testing two months earlier. The other two pipes were removed from a line after Remote Field Eddy Current/Transformer Coupling showed broken wires due to hydrogen embrittlement resulting from high voltage of the cathodic protection system. In the first two pipes, broken wires were induced by (1) cutting and removing the wires over a 4-ft length of the pipe from the entire pipe circumference and (2) by cutting the wires over a 4-ft length along a line. The first pipe removed from the line had 45 broken wires and was tested to failure. In testing the second pipe, 36 additional wires were cut. The results showed the failure modes of PCCP with broken wires. They also showed that the strength of PCCP with broken wires is in fact much greater than the strength of steel cylinder. The additional strength is derived from the block arching strength of cracked concrete. The paper presents the test results and the conclusions for comparison with finite elements and simplified analyses, performed as parts of the risk analysis of pipes with broken wires when subjected to the combined effects of internal pressure and earthload and pipe and fluid weights.
Hydrostatic Pressure Testing of Prestressed Concrete Cylinder Pipe with Broken Wires
Zarghamee, M.S. (author)
2003
10 Seiten, 3 Quellen
Conference paper
English
Hydrostatic Pressure Testing of Prestressed Concrete Cylinder Pipe with Broken Wires
| British Library Conference Proceedings | 2003
Risk Analysis of Prestressed Concrete Cylinder Pipe with Broken Wires
| British Library Conference Proceedings | 2003
Risk Analysis of Prestressed Concrete Cylinder Pipe with Broken Wires
| Tema Archive | 2003