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Title:Modified coefficient of subgrade reaction to laterally loaded piles
Authors:ID Gurbuz, Ayhan (Author)
ID Fakulteta za gradbeništvo, prometno inženirstvo in arhitekturo Univerze v Mariboru (Copyright holder)
Files:.pdf Acta_geotechnica_slovenica_2018_Gurbuz_Modified_coefficient_of_subgrade_reaction_to_laterally_loaded_piles_unlocked.pdf (735,27 KB)
MD5: 593F9E4955D3C42E535EDBC1FC3B221C
PID: 20.500.12556/dkum/d4ae482d-09a6-4a84-bb9a-a363d369643b
 
URL http://fgserver6.fg.um.si/journal-ags/2018-1/article-6.asp
 
Language:English
Work type:Scientific work
Typology:1.01 - Original Scientific Article
Organization:FGPA - Faculty of Civil Engineering, Transportation Engineering and Architecture
Abstract:An accurate prediction of the load capacity of a laterally loaded pile at a permissible displacement is an important concern at the design stage. In contrast to many sophisticated methods, Broms’ method based on moment equilibrium has been preferred by engineers to predict the load capacities of laterally loaded piles due to both its simplicity and because it is established on a way of hand calculation. However, Broms’ method typically overestimates a pile’s lateral load capacity as it requires a constant coefficient of horizontal subgrade reaction (nh) into analyses, regardless of the magnitude of the pile’s top displacement. In this study, modified coefficients of subgrade reactions(nh*) that are sensitive to the pile’s top displacement in cohesionless soils are first proposed to improve the performance level of Broms’ method for the prediction of the load capacity of a laterally loaded pile as the pile’s top displacement increases. The modified values of nh* are calibrated using 45 independently free-head, single-driven, full-scale pile tests from 23 sites in cohesionless soils. It is demonstrated that Broms’ method with nh* would correctly estimate a pile’s lateral load-deflection behavior with accuracy levels similar to more complicated methods.
Keywords:Broms' method, coefficient of horizontal subgrade reaction, p-y curves, strain wedge model
Publication status:Published
Publication version:Version of Record
Year of publishing:2018
Number of pages:str. 77-85
Numbering:Letn. 15, št. 1
PID:20.500.12556/DKUM-72667 New window
ISSN:1854-0171
ISSN on article:1854-0171
COBISS.SI-ID:305189376 New window
DOI:10.18690/actageotechslov.15.1.77-85.2018 New window
NUK URN:URN:SI:UM:DK:J24VNA0W
Copyright:Fakulteta za gradbeništvo, prometno inženirstvo in arhitekturo Univerze v Mariboru
Publication date in DKUM:11.10.2018
Views:1380
Downloads:616
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Categories:Misc.
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Record is a part of a journal

Title:Acta geotechnica Slovenica
Shortened title:Acta geotech. Slov.
Publisher:Fakulteta za gradbeništvo, prometno inženirstvo in arhitekturo Univerze v Mariboru
ISSN:1854-0171
COBISS.SI-ID:215987712 New window

Secondary language

Language:Slovenian
Title:Modificiran modul reakcije tal za bočno obtežene pilote
Abstract:Natančna napoved nosilnosti bočno obteženega pilota pri dovoljenem pomiku je pomembna v fazi načrtovanja. V nasprotju s številnimi sofisticiranimi metodami so inženirji največkrat napovedovali nosilnost bočno obteženih pilotov z Bromsovo metodo, ki temelji na ravnotežju momentov, zaradi svoje preprostosti in ker se izračun praktično izvede “na roke”. Vendar pa Bromsova metoda običajno precenjuje bočno obremenitev pilota, ker se v analizah upošteva konstanten horizontalni modul reakcije tal (nh), ne glede na velikost premika pilota na vrhu. V študiji so najprej predstavljeni modificirani moduli reakcije tal (nh*) za nekohezivne zemljine, ki izboljšajo učinkovitost Bromsove metode za napoved nosilnosti bočno obteženih pilotov z naraščanjem premika pilota na vrhu. Modificirane vrednosti nh* so bile kalibrirane z uporabo rezultatov 45 samostojnih preizkusov pilotov s 23 gradbišč v nekohezivnih tleh, s prosto glavo pilota in posamično zabitih. Pokazano je, da Bromsova metoda z nh* pravilno oceni obnašanje bočno obteženega pilota s podobno natačnostjo kot jo dosežemo pri bolj zapletenih metodah.
Keywords:Bromsova metoda, horizontalni modul reakcije tal, p-y krivulje, model deformacijskega klina


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This document is a part of these collections:
  1. Acta geotechnica Slovenica

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