Analysis of axially and laterally loaded piles for offshore structures | |
| Author | Navayogarajah, Nadarajah |
| Call Number | AIT Thesis no.GT-84-24 |
| Subject(s) | Piling (Civil engineering) Offshore structures |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Abstract | In the analysis of the behaviour of axially and later ally loaded offshore piles, the basic governing differential equation for axial load has been derived for compressible pile treating the problem as a one dimensional problem. The skin friction effect is taken in to account to derive the differential equation for lateral behaviour. In this way the problem in question differs from Hetenyi's approach for a problem of beam under axial and transverse load where skin friction effect is not considered. Apparently most of the research workers follow Hetenyi's approach for piles subjected to axial and later allowed without considering skin friction effect. Because of its generality and accessibility, the finite difference method is adopted to solve the differential equation for axial and lateral behaviour. Soil-pile interface system has been modeled as (i) constant soil modulus, (ii ) linearly varying soil modulus and ( iii) non-linear loaded reflection relationship. Actual soil data is adopted t o analyze pile in soil with non - linear load-deflection relationship. Computer programs are developed to solve the problem. Results are presented for piles with free-free and fixed-free e nd condition . Non dimensional analysis is carried out in order to make quantitative estimate of various parameters. The factors which influence the behaviour of axially and later ally loaded piles such as axial and lateral load , end condition of pile , axial load distribution along the pile , yielding of soil , skin friction effect, soil stiffness and pile length are considered. Comparison between the predicted and field observation reveals that the predicted results agrees well with the observed results. This indicates that the newley developed equation for lateral behaviour by considering the skin friction effect is a refinement to the existing theory for lateral pile behaviour a nd t h is method can be used to predict the behaviour of axially and laterally loaded piles with reasonable accuracy with in practical limits. |
| Year | 1985 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Geotechnical and Transportation Engineering (GT) |
| Chairperson(s) | Chandra, Sarvesh ;Balasubramaniam, A.S. |
| Examination Committee(s) | Bergado, Dennes T. |
| Scholarship Donor(s) | The Royal Norwegian Government |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1985 |