Analysis of Pile Foundations Subject to Static and Dynamic Loading最新文献

Analysis and characteristics of dynamic response of large pile groups 大型群桩动力响应分析及特点

Analysis of Pile Foundations Subject to Static and Dynamic Loading Pub Date : 2021-08-30 DOI: 10.1201/9780429354281-10

A. Kaynia

{"title":"Analysis and characteristics of dynamic response of large pile groups","authors":"A. Kaynia","doi":"10.1201/9780429354281-10","DOIUrl":"https://doi.org/10.1201/9780429354281-10","url":null,"abstract":"Dynamic response of pile foundations has been studied for many years with different models ranging from distributed Winkler springs to advanced analytical solutions. The special features in the dynamic impedances of pile foundations, which are mostly related to the group effect or pile-soil-pile interaction, have inspired researchers to develop dedicated computational tools for capturing them. In parallel, several research studies have been carried out to investigate whether these features are realistic, rather than being the result of the idealized models used for the piles and the soil domain. For example, one issue is to what extent the number of piles and the pile configuration affect the large peaks in the impedance functions. Another question is if these impedance characteristics change by the soil heterogeneity in the vertical and horizontal directions.\u0000 This paper attempts to answer some of these questions in the range of nearly elastic soil response for a large group consisting of 225 piles. Two profiles with shear moduli representing typical sand (parabolic with depth) and typical clay (linear with depth) are considered together with a homogenous soil profile for reference and for comparison of the results. The presented results include the foundation impedances of the pile foundations as functions of frequency in the horizontal and vertical directions together with their kinematic earthquake response. In addition, a limited number of analyses are performed to assess the effect of soil nonlinearity on the pile-soil-pile interaction.","PeriodicalId":263643,"journal":{"name":"Analysis of Pile Foundations Subject to Static and Dynamic Loading","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116305096","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simplified models for axial static and dynamic analysis of pile foundations 桩基础轴向静力和动力分析的简化模型

Analysis of Pile Foundations Subject to Static and Dynamic Loading Pub Date : 2021-07-30 DOI: 10.1201/9780429354281-5

G. Mylonakis, J. Crispin

{"title":"Simplified models for axial static and dynamic analysis of pile foundations","authors":"G. Mylonakis, J. Crispin","doi":"10.1201/9780429354281-5","DOIUrl":"https://doi.org/10.1201/9780429354281-5","url":null,"abstract":"Simplified methods for static and dynamic analysis of pile foundations under lateral loading are presented. Firstly, the classical model of a Beam on an elastic Winkler Foundation (BWF) and a number of formulas for the moduli of the associated springs and dashpots are briefly reviewed. This model (1) leads to a characteristic (“mechanical”) pile length, encompassing both pile stiffness and slenderness, which has no counterpart in continuum formulations of the problem; (2) reduces the number of dimensionless groups governing the response, by one. Secondly, solutions for stiffness of single piles are derived for both homogeneous and inhomogeneous soil conditions. These solutions are based on energy principles obtained using complex-valued shape functions analogous to those used in spectral finite-element methods, which account for phase differences in the response at different elevations down the pile. Use of these functions over existing formulations based on real-valued (static) shape functions, greatly improves the accuracy of the solution in the dynamic regime. It is also shown that the exponents in monomial expressions for the static stiffness of long piles, are constrained by a condition associated with the static condensation of the stiffness matrix, and that this condition is not satisfied in a number of formulae in literature. Thirdly, solutions for grouped piles are derived using the superposition approach of Poulos. To this end, a family of interaction factors accounting for pile-soil-pile interaction is reviewed. Results are presented in the form of dimensionless graphs and charts that elucidate critical aspects of the problem. Detailed comparisons with more rigorous numerical continuum solutions are provided.","PeriodicalId":263643,"journal":{"name":"Analysis of Pile Foundations Subject to Static and Dynamic Loading","volume":"543 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123266823","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Design of monopiles supporting offshore wind turbines using finite element analysis 基于有限元分析的海上风力发电机单桩支撑设计

Analysis of Pile Foundations Subject to Static and Dynamic Loading Pub Date : 2021-07-30 DOI: 10.1201/9780429354281-3

R. Klinkvort, N. Sivasithamparam

引用次数: 0

Pile foundations in liquefiable soils 可液化土壤中的桩基础

Analysis of Pile Foundations Subject to Static and Dynamic Loading Pub Date : 2021-07-30 DOI: 10.1201/9780429354281-9

S. Madabhushi

引用次数: 0

Design of piles under seismic loading 地震荷载作用下桩的设计

Analysis of Pile Foundations Subject to Static and Dynamic Loading Pub Date : 2021-07-30 DOI: 10.1201/9780429354281-8

R. D. Laora, Emmanouil Rovithis

引用次数: 6

Design of suction piles for offshore applications 海上应用吸桩的设计

Analysis of Pile Foundations Subject to Static and Dynamic Loading Pub Date : 2021-07-30 DOI: 10.1201/9780429354281-4

H. Jostad, K. Andersen

引用次数: 0

Inelastic stiffnesses of floating pile groups 浮桩群的非弹性刚度

Analysis of Pile Foundations Subject to Static and Dynamic Loading Pub Date : 2021-07-30 DOI: 10.1201/9780429354281-7

G. Gazetas, Joani Radhima, E. Garini

引用次数: 1

Analysis of laterally loaded pile foundations using the subgrade reaction method 用路基反力法分析横向荷载桩基

Analysis of Pile Foundations Subject to Static and Dynamic Loading Pub Date : 2021-07-30 DOI: 10.1201/9780429354281-2

Youhu Zhang

引用次数: 0

Design of piles for static loads 静荷载桩的设计

Analysis of Pile Foundations Subject to Static and Dynamic Loading Pub Date : 2021-07-30 DOI: 10.1201/9780429354281-1

C. Vrettos

引用次数: 0