Simple Shear Behaviour of Sarawak Alluvium

This study examines the behaviour of tropical alluvial soils, focusing on their simple shear characteristics and inherent anisotropy. The research addresses the limited understanding of these soils, which exhibit unconventional engineering properties. Direct simple shear (DSS) tests performed on 52...

Full description

Saved in:

Bibliographic Details
Main Author:	Nur Khairunnisa, Ismail
Format:	Thesis
Language:	English
Published:	2024
Subjects:	TA Engineering (General) Civil engineering (General)
Online Access:	http://ir.unimas.my/id/eprint/45963/1/Simple%20Shear%20Behaviour%20of%20Sarawak%20Alluvium.pdf
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my-unimas-ir.45963
record_format	uketd_dc
spelling	my-unimas-ir.459632024-09-06T08:34:37Z Simple Shear Behaviour of Sarawak Alluvium 2024-08-23 Nur Khairunnisa, Ismail TA Engineering (General). Civil engineering (General) This study examines the behaviour of tropical alluvial soils, focusing on their simple shear characteristics and inherent anisotropy. The research addresses the limited understanding of these soils, which exhibit unconventional engineering properties. Direct simple shear (DSS) tests performed on 52 undisturbed soil specimens cut in both horizontal and vertical orientations, alongside cyclic direct simple shear (CyDSS) tests on 16 specimens. The analysis revealed variations in index properties, with silt content prevailing over clay content. The DSS tests showed a typical stress-strain relationship, where shear strength increased until failure, followed by a reduction in strength. Pore water pressure increased with strain, reaching notable levels during testing. A relationship between undrained shear strength and over consolidation ratio (OCR) identified, with negligible differences in shear strength between orientations; however, vertically cut samples exhibited higher random errors. Microfabric analysis indicated a low preferred particle orientation, challenging the assumption of high anisotropy. Cyclic shearing tests revealed hysteresis loops with decreasing shear stress as cycles progressed. Excess pore water pressures correlated with displacement levels, while the damping ratio increased with shear strain but decreased with the number of cycles. The normalized shear modulus consistently decreased with increasing shear strain and loading cycles. These findings enhance the understanding of the strength behaviour and anisotropic characteristics of tropical alluvial soils. Universiti Malaysia Sarawak 2024-08 Thesis http://ir.unimas.my/id/eprint/45963/ http://ir.unimas.my/id/eprint/45963/1/Simple%20Shear%20Behaviour%20of%20Sarawak%20Alluvium.pdf text en validuser masters Universiti Malaysia Sarawak Civil Engineering, Faculty of Engneering
institution	Universiti Malaysia Sarawak
collection	UNIMAS Institutional Repository
language	English
topic	TA Engineering (General) Civil engineering (General)
spellingShingle	TA Engineering (General) Civil engineering (General) Nur Khairunnisa, Ismail Simple Shear Behaviour of Sarawak Alluvium
description	This study examines the behaviour of tropical alluvial soils, focusing on their simple shear characteristics and inherent anisotropy. The research addresses the limited understanding of these soils, which exhibit unconventional engineering properties. Direct simple shear (DSS) tests performed on 52 undisturbed soil specimens cut in both horizontal and vertical orientations, alongside cyclic direct simple shear (CyDSS) tests on 16 specimens. The analysis revealed variations in index properties, with silt content prevailing over clay content. The DSS tests showed a typical stress-strain relationship, where shear strength increased until failure, followed by a reduction in strength. Pore water pressure increased with strain, reaching notable levels during testing. A relationship between undrained shear strength and over consolidation ratio (OCR) identified, with negligible differences in shear strength between orientations; however, vertically cut samples exhibited higher random errors. Microfabric analysis indicated a low preferred particle orientation, challenging the assumption of high anisotropy. Cyclic shearing tests revealed hysteresis loops with decreasing shear stress as cycles progressed. Excess pore water pressures correlated with displacement levels, while the damping ratio increased with shear strain but decreased with the number of cycles. The normalized shear modulus consistently decreased with increasing shear strain and loading cycles. These findings enhance the understanding of the strength behaviour and anisotropic characteristics of tropical alluvial soils.
format	Thesis
qualification_level	Master's degree
author	Nur Khairunnisa, Ismail
author_facet	Nur Khairunnisa, Ismail
author_sort	Nur Khairunnisa, Ismail
title	Simple Shear Behaviour of Sarawak Alluvium
title_short	Simple Shear Behaviour of Sarawak Alluvium
title_full	Simple Shear Behaviour of Sarawak Alluvium
title_fullStr	Simple Shear Behaviour of Sarawak Alluvium
title_full_unstemmed	Simple Shear Behaviour of Sarawak Alluvium
title_sort	simple shear behaviour of sarawak alluvium
granting_institution	Universiti Malaysia Sarawak
granting_department	Civil Engineering, Faculty of Engneering
publishDate	2024
url	http://ir.unimas.my/id/eprint/45963/1/Simple%20Shear%20Behaviour%20of%20Sarawak%20Alluvium.pdf
_version_	1811771582731780096

Simple Shear Behaviour of Sarawak Alluvium

Similar Items