Dynamic analysis of a pile embedded in a half-space soil covered by a water layer is crucial for the designs of the pile foundations for bridges, docks and offshore platforms etc. In this paper, a coupled boundary element method (BEM) model is developed to evaluate the dynamic response of the pile. In the proposed model, the pile and half-space soil are treated as elastic media, while the water...

Approved for public release; distribution is unlimited. 1. Purpose. This manual provides information, foundation exploration and testing procedures, load test methods, analysis techniques, allowable criteria , design procedures, and construction consideration for the selection, design, and installation of pile foundations. The guidance is based on the present state of the technology for pile-so...

Cone penetration test is one of the most common in-situ tests for pile analysis given that by its analogy as a model pile, the measured cone resistance and sleeve friction can be employed for estimation of pile unit toe and shaft resistances, respectively. In this paper, group method of data handling (GMDH)-type neural networks optimized using Genetic algorithms (GAs) are used for modelling the...

Abstract For the design of a deep foundation, piles are presumed to transfer axial and lateral loads into ground. However, effects combined generally ignored in engineering practice since there uncertainties precise definition soil–pile interactions. Hence, for technical discussions interactions due dynamic loads, three-dimensional finite element model was developed evaluate soil pile performan...

The dynamic load test is currently an important and usual tool for design, control, quality assurance of deep foundations. objective this paper to compare the expected geotechnical capacity through empirical semi-empirical Brazilian methods with ultimate pile obtained from interpretation Dynamic Load Tests (DLT; PDA). stress-settlement curve was constructed CAPWAP analysis blows different drop ...

The wind turbine system in the offshore area will be subjected to combined action of complex marine environment dynamic loads. At present, there is a certain advantage using traditional mechanical devices simulate environmental In this study, self-developed load test loading adopted carry out series model tests for pile foundations. theoretical calculation results wind, wave and current are app...

A new efficient and accurate hybrid reliability method is proposed to estimate risk of an axially loaded single pile considering pile-soil interaction effect. Uncertainties associated with all the design variables are considered appropriately. It intelligently integrates the concepts of the response surface method, the finite difference method, the first-order reliability method, and an iterati...

Offshore wind-turbine support structures are largely made of steel since monopiles have accounted for the majority installations in last decade. As turbines become bigger, led to an exponential increase material and installation costs. From this point view, use concrete future has been initiated. In study, concrete–steel composite piles investigated. A pre-tensioned high strength pile was place...

The ultimate axial bearing capacity (UABC) of a single pile is an important parameter in design. BP neural network (BPNN) has strong nonlinear mapping ability and can effectively predict the UABC pile. However, frequent immersion unstable search results with local vibration leads BPNN to less usable solution. weights biases model are optimized using improved radial movement optimization (IRMO) ...