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Author: Shigeyuki Kohno Publisher: ISBN: Category : Tunneling Languages : en Pages : 532
Book Description
Recent developments of tunnelling technology have led to the construction of many tunnels, not only in rural areas, but also in cities. In particular, tunnel construction in cities requires very high standards of safety, since failure can cause the loss of many human lives as well as damage of properties. Despite the recent advances in the development of tunnelling methods, it is still difficult to predict the exact properties of the ground where the tunnels are planned to be constructed, due to large uncertainties. Designs that do not take into account the effect of uncertainties could be subject to large error. Consequently, it is very important that uncertainties be accounted for properly in design. The objective of this study is to propose the use of probabilistic methods to study the effect of uncertainties in the exploration phase, design phase and construction phase of a tunnel project. The outline for each phase is as follows: (1) Exploration phase. Prior to design, rock profiles at a planned site is probabilistically evaluated, based on the information of local experts and borings. (2) Design phase. The reliability of the tunnel supports in soft rock is first examined. The effects of the creep of the rock and bending moment of the lining on the reliability are also evaluated. Next, reliability of the lining in a jointed hard rock is evaluated by first-order second-moment method, based on the distributions of the geometrical properties of the joints. The effect of blasting on the reliability is also examined by linear elastic fracture mechanics. (3) Construction phase. The probabilistic method is presented to predict the long-term deformation of the opening surface during construction. Bayesian approach is used to update the accuracy of the prediction, based on the observed deformation. The reliability of the lining is re-evaluated on the basis of the updated long-term deformation.
Author: Shigeyuki Kohno Publisher: ISBN: Category : Tunneling Languages : en Pages : 532
Book Description
Recent developments of tunnelling technology have led to the construction of many tunnels, not only in rural areas, but also in cities. In particular, tunnel construction in cities requires very high standards of safety, since failure can cause the loss of many human lives as well as damage of properties. Despite the recent advances in the development of tunnelling methods, it is still difficult to predict the exact properties of the ground where the tunnels are planned to be constructed, due to large uncertainties. Designs that do not take into account the effect of uncertainties could be subject to large error. Consequently, it is very important that uncertainties be accounted for properly in design. The objective of this study is to propose the use of probabilistic methods to study the effect of uncertainties in the exploration phase, design phase and construction phase of a tunnel project. The outline for each phase is as follows: (1) Exploration phase. Prior to design, rock profiles at a planned site is probabilistically evaluated, based on the information of local experts and borings. (2) Design phase. The reliability of the tunnel supports in soft rock is first examined. The effects of the creep of the rock and bending moment of the lining on the reliability are also evaluated. Next, reliability of the lining in a jointed hard rock is evaluated by first-order second-moment method, based on the distributions of the geometrical properties of the joints. The effect of blasting on the reliability is also examined by linear elastic fracture mechanics. (3) Construction phase. The probabilistic method is presented to predict the long-term deformation of the opening surface during construction. Bayesian approach is used to update the accuracy of the prediction, based on the observed deformation. The reliability of the lining is re-evaluated on the basis of the updated long-term deformation.
Author: Jie Zhang Publisher: Springer Nature ISBN: 9811962545 Category : Science Languages : en Pages : 323
Book Description
This textbook systematically introduces the theories, methods, and algorithms for geotechnical reliability analysis. There are a lot of illustrative examples in the textbook such that readers can easily grasp the concepts and theories related to geotechnical reliability analysis. A unique feature of the textbook is that computer codes are also provided through carefully designed examples such that the methods and the algorithms described in the textbook can be easily understood. In addition, the computer codes are flexible and can be conveniently extended to analyze different types of realistic problems with little additional efforts.
Author: Bak Kong Low Publisher: CRC Press ISBN: 1000472566 Category : Technology & Engineering Languages : en Pages : 399
Book Description
This book contains probabilistic analyses and reliability-based designs (RBDs) for the enhancement of Eurocode 7 (EC7) and load and resistance factor design (LRFD) methods. An intuitive perspective and efficient computational procedure for the first-order reliability method (FORM, which includes the Hasofer–Lind reliability index) is explained, together with discussions on the similarities and differences between the design point of EC7/LRFD and RBD-via-FORM. Probability-based designs with respect to the ultimate and serviceability limit states are demonstrated for soil and rock engineering, including shallow and deep foundations, earth-retaining structures, soil slopes, 2D rock slopes with discontinuities, 3D rock slopes with wedge mechanisms, and underground rock excavations. Renowned cases in soil and rock engineering are analyzed both deterministically and probabilistically, and comparisons are made with other probabilistic methods. This book is ideal for practitioners, graduate students and researchers and all who want to deepen their understanding of geotechnical RBD accounting for uncertainty and overcome some limitations and potential pitfalls of the evolving LRFD and EC7. Solutions for the book’s examples are available online and are helpful to acquire a hands-on appreciation: https://www.routledge.com/9780367631390.
Author: Phung Duc Long Publisher: Springer Nature ISBN: 9811521840 Category : Science Languages : en Pages : 1417
Book Description
This book presents 09 keynote and invited lectures and 177 technical papers from the 4th International Conference on Geotechnics for Sustainable Infrastructure Development, held on 28-29 Nov 2019 in Hanoi, Vietnam. The papers come from 35 countries of the five different continents, and are grouped in six conference themes: 1) Deep Foundations; 2) Tunnelling and Underground Spaces; 3) Ground Improvement; 4) Landslide and Erosion; 5) Geotechnical Modelling and Monitoring; and 6) Coastal Foundation Engineering. The keynote lectures are devoted by Prof. Harry Poulos (Australia), Prof. Adam Bezuijen (Belgium), Prof. Delwyn Fredlund (Canada), Prof. Lidija Zdravkovic (UK), Prof. Masaki Kitazume (Japan), and Prof. Mark Randolph (Australia). Four invited lectures are given by Prof. Charles Ng, ISSMGE President, Prof.Eun Chul Shin, ISSMGE Vice-President for Asia, Prof. Norikazu Shimizu (Japan), and Dr.Kenji Mori (Japan).
Author: Ali El Matarawi Publisher: ISBN: Category : Languages : en Pages : 0
Book Description
Variability is prevalent in rock engineering conditions. This renders commonly used deterministic design approaches with empirical factors of safety unsuitable for objectively quantifying safety. Instead, probabilistic reliability based design (RBD) can objectively do so with probabilities of failure. However, due to the unfamiliarity of RBD to practicing engineers, 'partial factors' are calibrated which allow deterministic analyses to achieve designs of predefined probabilities of failure. This dissertation investigates the application of calibrated partial factors in tunnel liner design, and its possible inclusion in a coherent design code format. The dissertation concludes that partial factors calibrated from RBD can be applied in design of tunnel liners. However, due to the lack of data collected in rock engineering, development of a design code cannot be currently undertaken. In addition, it is only realistically feasible for simple tunnel construction and support sequences, suggesting that the application of RBD is best done on case-by-case basis.
Author: Ehsan Noroozinejad Farsangi Publisher: CRC Press ISBN: 100041809X Category : Technology & Engineering Languages : en Pages : 597
Book Description
Increasing demand on improving the resiliency of modern structures and infrastructure requires ever more critical and complex designs. Therefore, the need for accurate and efficient approaches to assess uncertainties in loads, geometry, material properties, manufacturing processes, and operational environments has increased significantly. Reliability-based techniques help develop more accurate initial guidance for robust design and help to identify the sources of significant uncertainty in structural systems. Reliability-Based Analysis and Design of Structures and Infrastructure presents an overview of the methods of classical reliability analysis and design most associated with structural reliability. It also introduces more modern methods and advancements, and emphasizes the most useful methods and techniques used in reliability and risk studies, while elaborating their practical applications and limitations rather than detailed derivations. Features: Provides a practical and comprehensive overview of reliability and risk analysis and design techniques. Introduces resilient and smart structures/infrastructure that will lead to more reliable and sustainable societies. Considers loss elimination, risk management and life-cycle asset management as related to infrastructure projects. Introduces probability theory, statistical methods, and reliability analysis methods. Reliability-Based Analysis and Design of Structures and Infrastructure is suitable for researchers and practicing engineers, as well as upper-level students taking related courses in structural reliability analysis and design.
Author: Dirk Proske Publisher: Springer Nature ISBN: 303097247X Category : Technology & Engineering Languages : en Pages : 149
Book Description
The mathematical verification of the safety of structures can be done by determining the probability of failure or by using safety elements. Observed damages and collapses are usually assessed within the framework of expert reports, which seems reasonable due to the large number of unique structures in the construction industry. However, there should also be an examination of observed safety across all structures. Therefore, in this book the collapse frequencies are determined for different types of structures, such as bridges, dams, tunnels, retaining structures and buildings. The collapse frequency, like the failure probability, belongs to stochasticity. Therefore, the observed mean collapse frequencies and the calculated mean failure probabilities are compared. This comparison shows that the collapse frequencies are usually lower than the calculated failure probabilities. In addition, core damage frequencies and probabilities are given to extend the comparison to another technical product.
Author: Kok-Kwang Phoon Publisher: CRC Press ISBN: 1003801250 Category : Technology & Engineering Languages : en Pages : 521
Book Description
Uncertainty, Modeling, and Decision Making in Geotechnics shows how uncertainty quantification and numerical modeling can complement each other to enhance decision-making in geotechnical practice, filling a critical gap in guiding practitioners to address uncertainties directly. The book helps practitioners acquire a working knowledge of geotechnical risk and reliability methods and guides them to use these methods wisely in conjunction with data and numerical modeling. In particular, it provides guidance on the selection of realistic statistics and a cost-effective, accessible method to address different design objectives, and for different problem settings, and illustrates the value of this to decision-making using realistic examples. Bringing together statistical characterization, reliability analysis, reliability-based design, probabilistic inverse analysis, and physical insights drawn from case studies, this reference guide from an international team of experts offers an excellent resource for state-of-the-practice uncertainty-informed geotechnical design for specialist practitioners and the research community.
Author: Roberto Tomás Publisher: CRC Press ISBN: 1040225756 Category : Technology & Engineering Languages : en Pages : 1585
Book Description
New Challenges in Rock Mechanics and Rock Engineering includes the contributions presented at the ISRM European Rock Mechanics Symposium Eurock 2024 (Alicante, Spain, 15-19 July 2024), and explores cutting-edge advancements in rock mechanics and rock engineering. This comprehensive compilation covers various aspects of rock mechanics and rock engineering, including: rock properties, testing methods, infrastructure and mining rock mechanics, design analysis, stone heritage preservation, geophysics, numerical modeling, monitoring techniques, underground excavation support, risk assessment, and the application of EUROCODE-7 in rock engineering. Furthermore, it addresses areas like geomechanics for the oil and gas industry, applications of artificial intelligence, remote sensing methodologies and geothermal technology. New Challenges in Rock Mechanics and Rock Engineering covers the latest breakthroughs and tackles the new challenges in rock mechanics and rock engineering, is aimed at scientists and professionals in these fields, and serves as an essential resource for keeping up to date with industry trends and solutions.
Author: Shigeyuki Kohno
Author: Shigeyuki Kohno
Author: 
Author: Jie Zhang
Author: Bak Kong Low
Author: Phung Duc Long
Author: Ali El Matarawi
Author: Ehsan Noroozinejad Farsangi
Author: Dirk Proske
Author: Kok-Kwang Phoon
Author: Roberto Tomás