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Full-Text Articles in Engineering
Tire-Chip Reinforced Foundation As Liquefaction Countermeasure For Residential Buildings, Hemanta Hazarika, Siavash Manafi Khajeh Pasha, Isao Ishibashi, Norimasa Yoshimoto, Tota Kinoshita, Shigeki Endo, Ashoke Kumar Karmokar, Takuto Hitosugi
Tire-Chip Reinforced Foundation As Liquefaction Countermeasure For Residential Buildings, Hemanta Hazarika, Siavash Manafi Khajeh Pasha, Isao Ishibashi, Norimasa Yoshimoto, Tota Kinoshita, Shigeki Endo, Ashoke Kumar Karmokar, Takuto Hitosugi
Civil & Environmental Engineering Faculty Publications
To prevent vibration-induced and liquefaction-induced damage to residential buildings during earthquakes, a low-cost technique has been developed and described here. It utilizes a mixture of tire chips and gravel as the horizontal reinforcing inclusion under the foundation of residential houses. The horizontal reinforcing inclusion refers to a layer of tire chips and gravel which is placed horizontally beneath the foundation. This mixture of tire chips and gravel provides sufficient bearing capacity to the foundation. In this research, a series of small-scale 1 g model shaking table tests was performed to evaluate the effectiveness of the technique. In addition, cyclic undrained …
Hydrothermal Catalytic Liquefaction And Deoxygenation Of Biomass For Renewable Fuel Production, Sergiy Popov
Hydrothermal Catalytic Liquefaction And Deoxygenation Of Biomass For Renewable Fuel Production, Sergiy Popov
Civil & Environmental Engineering Theses & Dissertations
In recent years, sub- and supercritical water technologies received an increasing attention because of the numerous advantages they offer for biomass converting into biofuels. Water at elevated temperatures and pressures provides an ideal medium for chemical transformations. It serves as a reactant, reaction medium, and catalyst that helps biomass compounds undergo hydrolysis, depolymerization, dehydration, decarboxylation, and condensation/repolymerization reactions. Biomass is the fourth largest source of energy in the world after coal, oil, and natural gas that has the potential to provide the large scale substitution of hydrocarbon-based liquid transportation fuels and minimize the environmental issues. Biomass typically contains 40-60% oxygen. …
Anisotropy And Its Relation To Liquefaction Resistance Of Granular Material, Isao Ishibashi, Omer F. Capar
Anisotropy And Its Relation To Liquefaction Resistance Of Granular Material, Isao Ishibashi, Omer F. Capar
Civil & Environmental Engineering Faculty Publications
This research establishes quantitative relationships between soil's anisotropy and liquefaction resistance for granular materials. Uniform medium density (Dr = 50%) sand specimens were prepared using three different sample preparation techniques (air pluviated (AP), moist tamped (NIT), and moist vibrated (MV)) to create different initial soil fabrics. Undrained cyclic triaxial tests were then performed to determine the liquefaction resistance of each soil specimen. On the same specimens in the triaxial cell, vertical and horizontal compression wave velocities and vertical shear wave velocity (Vs) were measured using piezoelectric bender elements. Anisotropic (transversely isotropic) elastic constants of the soil specimens were …
Determination Of Anisotropy Of Granular Materials And Its Relation To Liquefaction Resistance Under Cyclic Loading, Omer Faruk Capar
Determination Of Anisotropy Of Granular Materials And Its Relation To Liquefaction Resistance Under Cyclic Loading, Omer Faruk Capar
Civil & Environmental Engineering Theses & Dissertations
Granular materials such as sand deposits have anisotropic characteristics due to the gravitational forces during depositional process and various stress histories. These anisotropic characteristics make evaluation of liquefaction resistance of soil very complex. Since obtaining undisturbed soil specimens for laboratory tests from discrete elements like sandy soils is very laborious, the soil specimens are reconstituted in laboratory with regards to the in-situ density of soil. Reconstituting the soil changes the soil fabric or anisotropic characteristics in comparison with field conditions. Many researchers have pointed out that liquefaction resistance is highly influenced by differences in the structure of the soil (or …