دانلود رایگان مقاله روش طراحی ژئوتکنیکی و اقلیمی برای شفت حفر شده در معرض بار محوری – سال 2020
مشخصات مقاله:
عنوان فارسی مقاله:
روش طراحی ژئوتکنیکی و اقلیمی برای شفت حفر شده در معرض بار محوری
عنوان انگلیسی مقاله:
Coupled geotechnical-climatic design procedure for drilled shaft subjected to axial load
کلمات کلیدی مقاله:
شافت حفاری، رویداد اقلیمی، واقعه هیدرولوژیکی، ظرفیت محوری، خاک تا حدودی اشباع شده، زیر ساخت
کلمات کلیدی انگلیسی:
Drilled shaft – Climatic event – Hydrological event – Axial capacity – Partially saturated soil – Infrastructure
مناسب برای رشته های دانشگاهی زیر:
مهندسی عمران
مناسب برای گرایش های دانشگاهی زیر:
خاک و پی یا ژئوتکنیک
وضعیت مقاله انگلیسی و ترجمه:
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فهرست مطالب:
Abstract
Keywords
Nomenclature
1. Introduction
2. Coupled geotechnical-climatic design of drilled shaft
2.1. Ultimate axial capacity – safety requirement
2.1.1. Skin resistance
2.1.2. Tip resistance
2.2. Settlement (elastic) – serviceability requirement
3. Determination of spatial variation of degree of saturation and matric suction
3.1. Numerical solution procedure
3.2. Initial and boundary conditions
3.2.1. Resultant infiltration – upper boundary condition
3.2.2. Water table – lower boundary condition
3.3. Model verification
4. Site-specific design application
4.1. Study sites
4.2. Probability distribution of boundary conditions
4.2.1. Constructing probability distribution
4.3. Climatic loads
4.4. Initial design and design parameters
4.5. Computational platform
5. Results and discussion
5.1. 3-Day rainfall analyses
5.1.1. Average matric suction and degree of saturation
5.1.2. Variation of elastic settlement
5.1.3. Variation of ultimate axial capacity
5.1.4. Effect of drilled shaft size
5.1.5. Foundation design values determination and comparison with deterministic approach
5.2. Parametric study-impact of rainfall duration
6. Summary and conclusion
Funding
References
قسمتی از مقاله انگلیسی:
1. Introduction
The recent records indicate that the severe hydrological/climatic events such as heavy rainfall, flood, and drought have become frequent in recent years (Trenberth, 2011). These events cause significant economic losses every year in the United States and around the world. The 2014 New York flood, 2015 Missouri flood, 2016 Oklahoma flood, 2016 Louisiana flood, 2017 California flood, and 2017 Houston flood are some of the examples of severe floods in the United States. Also, the significant part of the United States has been struggling with the severe droughts over a long period of time. The droughts happened in the North America during the 19th century, Southwestern United States (New Mexico and Texas) in 1950, and Midwest and Rocky Mountain regions in 2002 are some of the examples of severe drought in the United States. According to the National Climatic Data Centre (NCDC), 30% of the United States suffered from moderate to severe drought in recent years. These extreme hydrological/climatic events have notable damages to the above-ground structures (Steenbergen et al., 2009). The load-bearing capacity and settlement of foundation, an interface between the above-ground structures and the subsurface soil are highly affected by the flow, deformation, and strength properties of the underlying soil. These soil properties are greatly influenced by the hydrological/climatic events through changing the saturation level of the subsurface soil. However, the impacts of hydrological/climatic events on the subsurface soil properties and subsequently the foundations that support various structures such as bridge, buildings, earth dams, and levees are ignored in the current design procedures (Schuster and Highland, 2001; Robinson et al., 2017; Turnbull, 2016).
