الفهرس | Only 14 pages are availabe for public view |
Abstract Glass-fiber reinforced polymer pipes (GFRP) have been recently used as permanent casings in the construction of foundations piles. Benefits of GFRP composite piles, as compared to conventional concrete-filled steel casing piles, include long term durability, high strength, low maintenance costs, and long expected service life especially when used in marine applications and other corrosive environments. In this study locally manufactured GFRP pipes are filled with concrete to produce composite GFRP-concrete piles. The main objective of this research is to study the behavior of the composite GFRP-concrete piles embedded in dry dense sand in both cases of lateral and axial loading conditions. First, the confining effect of GFRP pipes on the concrete core was investigated by laboratory tests on short composite cylindrical cross sections subjected to axial compression. Four point bending tests on concrete, GFRP hollow pipes and GFRP composite cross sections have followed to investigate the flexural behavior. Laboratory model tests of the GFRP composite piles, installed in dry sand, have been performed to investigate the behavior under axial compression and lateral loading. The test results showed that the internal capacity of the proposed composite section significantly exceeds the sum of the individual load capacity of the two materials in both cases of axial and flexural loadings. The ultimate strength and strain of the tested GFRP-Concrete cross sections are comparable to the published equations for axial ultimate strength. |