TAILIEUCHUNG - Brief summary of engineering doctoral thesis: Analysis of influencing parameters and basics of determining resistance factors of drilled shafts used in bridge substructures in Ho Chi Minh city

Objectives of doctoral thesis Analysis of influencing parameters and basics of determining resistance factors of drilled shafts used in bridge substructures in Ho Chi Minh city: Determine resistance factors according to soil base strength which is equivalent to methods presented in specifications being applied. | MINISTER OF EDUCATION AND TRAINING UNIVERSITY OF TRANSPORT AND COMMUNICATIONS NGO CHAU PHUONG ANALYSIS OF INFLUENCING PARAMETERS AND BASICS OF DETERMINING RESISTANCE FACTORS OF DRILLED SHAFTS USED IN BRIDGE SUBSTRUCTURES IN HO-CHI-MINH CITY MAJOR BRIDGE AND TUNNEL ENGINEERING CODE BRIEF SUMMARY OF ENGINEERING DOCTORAL THESIS Hanoi-2014 This thesis completed at Faculty of Civil Engineering University of Transport and Communications SUPERVISORS 1. . Dr. Tran Duc Nhiem 2. . Nguyen Ngoc Long Reviewer 1 Prof. Dr. Nguyen Nhu Khai National University of Civil Engineering Vietnam. Reviewer 2 Prof. Dr. Nguyen Dong Anh Institute of Mechanics Vietnam. Reviewer 3 Dr. Do Huu Thang Institute of Transport Science and Technology Vietnam. Thesis is defended in front of the University-Graded Committee of thesis evaluation according to Decision 1359 QĐ-ĐHGTVT on date 17th June 2014 signed by the Rector of University of Transport and Communications on . Readers can find this thesis at - Vietnam National Library - Library of the University of Transport and Communications 1 INTRODUCTION By applying statistics and probability and reliability theory to engineering foundations the thesis proposes a pattern to determine resistance factors of drilled shafts used in bridge substructures based on statistics characteristics of the ratio between real measured values and estimated values for Resistance R and load effect Q . Then by analyzing statistics characteristics of the capacity based on 24 results of static axial compressive load test of drilled shafts that were constructed by the wet method bentonite in cohesive and non-cohesive composite soils in Ho-Chi-Minh city the thesis captures the determination of resistance factors for four different calculation methods of pile resistance design based on soil base strength condition. Literature Review Drilled shafts construction technology was first used in America 1890 in over the word 1950 and in .

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