Open AccessTest-loading Capacity Estimation of Slip-lined RCPs using a plastic approach
Author(s) -
Yuting He,
Xinsha Fu,
Bai-jian Li
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/474/6/062014
Subject(s) - grout , structural engineering , fibre reinforced plastic , geotechnical engineering , concentric , materials science , engineering , mathematics , geometry
As many reinforced concrete pipes (RCPs) need to be rehabilitated due to the reconstruction, expansion of highways and structural damage. Inserting a corrugated steel pipe (CSP) into the existing RCP is an economical rehabilitation technique in China, the current research seeks to better understand the performance of the RCP rehabilitated with grouted CSP by using the reinforced concrete pipes (RCPs) as the host pipes. Experiments were conducted to (1) determine the test-loading capacity of five specimens; (2) understand the role of the liner (CSP); (3) understand the influence of eccentric rehabilitation on the test-loading capacity of the slip-lined pipe; (4) explore an approach to estimate the load-carrying capacity of the rehabilitated pipes. The test-loading capacity of an RCP rehabilitated with grouted CSP mainly depends on the RCP and the grout before the first peak value of the applied versus diameter change curve, CSP improved the maximum test-loading capacity and ductility of rehabilitated pipe. The test-loading capacity of an eccentric rehabilitated pipe was lower than that of a concentric rehabilitated pipe. The comparison of the calculated results showed that the plastic approach was reasonable for an RCP rehabilitated grout CSP. Meanwhile, an approach for analyzing a vertical eccentric rehabilitated pipe was proposed based on the plastic approach. The errors between the theoretical results and experimental results were basically less than 30%.