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Автор: Williams
Дата: 21 апреля 2020
Просмотров: 4 021 |
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Braja Das, Nagaratnam Sivakugan - Principles of Foundation Engineering. 9th SI Edition
Cengage Learning, 2019
pdf, 884 pages, english
ISBN-13: 978-1-337-70503-5
Soil mechanics and foundation engineering have developed rapidly during the last seventy years. Intensive research and observation in the field and the laboratory have refined and improved the science of foundation design. Originally published in the fall of 1983, Principles of Foundation Engineering is now in the
ninth edition. It is intended primarily for use by undergraduate civil engineering students. The use of this text throughout the world has increased greatly over the years. It has also been translated into several languages. New and improved materials that have been published in various geotechnical engineering journals and conference proceedings, consistent with the level of understanding of the intended users, have been incorporated into each edition of the text.
New to This Edition
Based on the increased developments in the field of geotechnical engineering, the authors have added three new chapters to this edition. The ninth edition of Principles of Foundation Engineering contains a total of 19 chapters. Listed here is a summary of the major revisions from the eighth edition and new additions to this edition.
- Numerous new photographs in full color have been included in various chapters as needed.
- The Introduction Chapter (Chapter 1) has been entirely revised and expanded with sections on geotechnical engineering, foundation engineering, soil exploration, ground improvement, solution methods, numerical modeling, empiricism, and literature.
- Chapter 2 on Geotechnical Properties of Soil includes new sections on the range of coefficient of consolidation and selection of shear strength parameters for design. All of the end-of-chapter problems are new.
- Chapter 3 on Natural Soil Deposits and Subsoil Exploration has an improved figure on soil behavior type chart based on cone penetration test.
- Chapter 4 on Instrumentation and Monitoring in Geotechnical Engineering is a new chapter that describes the use of instruments in geotechnical projects, such as piezometer, earth pressure cell, load cell, inclinometer, settlement plate, strain gauge, and others.
- Soil Improvement (Chapter 5) has some details on typical compaction requirements as well as improved figures in the section of precompression. About half of the problems at the end of the chapter are new.
- Chapter 6 on Shallow Foundations: Ultimate Bearing Capacity has new sections on a simple approach for bearing capacity with two-way eccentricities, and plane strain correction of friction angle.
- Chapter 7 on Ultimate Bearing Capacity on Shallow Foundation: Special Cases has a section on ultimate bearing capacity of a wedge-shaped foundation. About half of the end-of-chapter problems are new.
- Chapter 8 on Vertical Stress Increase in Soil has a new section on stress below a horizontal strip load of finite width and infinite length. The majority of the end-of-chapter problems are new.
- In Chapter 9 on Settlement of Shallow Foundations, Section 9.3 on settlement based on the theory of elasticity has been thoroughly revised with the addition of the results of the studies of Poulos and Davis (1974) and Giroud (1968). In Section 9.6, which discusses the topic of settlement of foundation on sand based on standard penetration resistance, Terzaghi and Peck’s method (1967) has been added. Elastic settlement considering soil stiffness variation with stress level is given in a new section (Section 9.7). Other additions include settlement estimation using the L1 – L2 method (Section 9.9) (Akbas and Kulhawy, 2009) and Shahriar et al.’s (2014) method to estimate elastic settlement in granular soil due to the rise of ground water table (Section 9.10). The section on tolerable settlement of buildings has been fully revised. More than half of the end-of-chapter problems are new.
- In Chapter 10 on Mat Foundations, the reinforcement design portion for the mats was removed to concentrate more on the geotechnical portion. All end-ofchapter problems are new.
- Chapter 11 on Load and Resistance Factor Design (LRFD) is a new chapter. It provides the design philosophies of the allowable stress design (ASD) and load and resistance factor design in a simple way.
- Chapter 12 on Pile Foundations has a new section defining point bearing and friction piles (Section 12.5). Section 12.5 on installation of piles has been thoroughly revised. Factor of safety for axially loaded piles suggested by USACE (1991) has been incorporated in Section 12.8 on equations for estimating pile capacity. The analysis by Poulos and Davis (1974) for estimation of elastic settlement of piles has been included in Section 9.17. About half of the end-ofchapter problems are new.
- In Chapter 13 on Drilled Shaft Foundations, several figures have been improved to aid in better interpolation for solving problems. More than half of the end-of-chapter problems are new.
- Chapter 14 on Piled Rafts—An Overview is a new chapter. It describes optimizations of the advantages of pile foundations and raft foundations for construction of very tall buildings.
- In Chapter 15 on Foundations on Difficult Soil, all but two of end-of-chapter problems are new.
- Chapter 16 on Lateral Earth Pressure has two new sections on (a) generalized case for Rankine seismic active pressure—granular backfill (Section 16.5), and (B) solution for passive earth pressure by lower bound theorem of plasticity (Section 16.15). The section on passive force on walls with earthquake forces (Section 16.7) has been expanded. All end-of-chapter problems are new.
- In Chapter 17 on Retaining Walls, a new section (Section 17.10) on gravity retaining wall design for earthquake conditions has been added. Discussion on the properties of geotextile has been expanded along with some new geotextile photographs. More than half of the end-of-chapter problems are new.
- Chapter 18 on Sheet-Pile Walls has three new sections added: (a) cantilever sheet piles penetrating sandy soil—a simplified approach (Section 18.8); (B) free earth support method for penetration of sandy soil—a simplified approach (Section 18.10); and holding capacity of deadman anchors (Section 18.18). All end-of-chapter problems are new.
- In Chapter 19 on Braced Cuts, all end-of-chapter problems are new.
- Each chapter now includes a Summary section. New and revised example problems are presented in various chapters as needed.
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Автор: Williams
Дата: 20 апреля 2020
Просмотров: 2 079 |
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nanoSoft nanoCAD СКС v11.0.5040.5040 x64
nanoCAD СКС предназначен для автоматизированного проектирования структурированных кабельных систем (СКС) зданий и сооружений различного назначения.
nanoCAD СКС позволяет решать следующие задачи:
- консолидация информации по проекту;
- создание системы кабельных каналов;
- проектирование горизонтальной подсистемы;
- проектирование магистральной подсистемы здания;
- проектирование распределительных пунктов этажа и здания;
- проектирование магистральных кабелей и кроссов телефонии здания;
- автоматическая трассировка кабелей;
- автоматическое составление отчетных документов (спецификация, кабельные журналы, схемы компоновки монтажных конструктивов, структурная схема).
Основные возможности:
- автоматически формируемая и выгружаемая по ГОСТ спецификация оборудования;
- автоматически формируемые и выгружаемые по ГОСТ три вида кабельных журналов;
- автоматически формируемая схема компоновки монтажных конструктивов;
- автоматически формируемая структурная схема соединений кабельной системы здания;
- заполнение монтажных конструктивов панелями в автоматическом режиме на основе количества портов рабочих мест;
- автоматически проставленные выноски маркировок рабочих мест;
- автоматическая перемаркировка оборудования отображаемая в выносках маркировки и отчетных документах при различных изменениях в проекте;
- работа с базами данных производителей оборудования СКС;
- база УГО открыта для редактирования и добавления новых обозначений;
- создание системы кабельных каналов практически любой сложности;
- автоматический подбор и подсчет соединительных элементов кабельных каналов (углы, отводы и т.п.), а также узлов крепления для лотков;
- расчет емкости кабельных каналов исходя из количества проложенного кабеля;
- создание соединений горизонтальной подсистемы и магистральной подсистемы здания (скачать пример);
- трассировка кабеля, как в горизонтальной плоскости, так и в вертикальной, а также между этажами, расположенными в разных DWG-файлах;
- настройка добавочных коэффициентов для подсчета кабеля для всего проекта, а также индивидуальная настройка длины кабеля для горизонтальной подсистемы;
- интеллектуальные объекты программы с различными подсказками;
- возможность выбора программного обеспечения при выгрузке отчетных документов – Microsoft Office или OpenOffice.org;
- возможность выбора единиц измерения для кабелей и кабельных каналов при выводе в спецификацию.
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Автор: Williams
Дата: 19 апреля 2020
Просмотров: 1 804 |
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Raphael Boulbes - Troubleshooting Finite-Element Modeling with Abaqus
With Application in Structural Engineering Analysis
Springer, 2020
pdf, 453 pages, english
ISBN: 978-3-030-26740-7
This book gives Abaqus users who make use of finite-element models in academic or practitioner-based research the in-depth program knowledge that allows them to debug a structural analysis model. The book provides many methods and guidelines for different analysis types and modes, that will help readers to solve problems that can arise with Abaqus if a structural model fails to converge to a solution. The use of Abaqus affords a general checklist approach to debugging analysis models, which can also be applied to structural analysis.
The author uses step-by-step methods and detailed explanations of special features in order to identify the solutions to a variety of problems with finite-element models. The book promotes:
- a diagnostic mode of thinking concerning error messages;
- better material definition and the writing of user material subroutines;
- work with the Abaqus mesher and best practice in doing so;
- the writing of user element subroutines and contact features with convergence issues; and
- consideration of hardware and software issues and a Windows HPC cluster solution.
The methods and information provided facilitate job diagnostics and help to obtain converged solutions for finite-element models regarding structural component assemblies in static or dynamic analysis. The troubleshooting advice ensures that these solutions are both high-quality and cost-effective according to practical experience.
The book offers an in-depth guide for students learning about Abaqus, as each problem and solution are complemented by examples and straightforward explanations. It is also useful for academics and structural engineers wishing to debug Abaqus models on the basis of error and warning messages that arise during finite-element modelling processing. |
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Автор: Williams
Дата: 18 апреля 2020
Просмотров: 1 942 |
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Andreas Ochsner - Computational Statics and Dynamics
An Introduction Based on the Finite Element Method, 2 Edition
Springer, 2020
pdf, 616 pages, english
ISBN: 978-981-15-1277-3
This book is the 2nd edition of an introduction to modern computational mechanics based on the finite element method. It includes more details on the theory, more exercises, and more consistent notation; in addition, all pictures have been revised. Featuring more than 100 pages of new material, the new edition will help students succeed in mechanics courses by showing them how to apply the fundamental knowledge they gained in the first years of their engineering education to more advanced topics. In order to deepen readers’ understanding of the equations and theories discussed, each chapter also includes supplementary problems. These problems start with fundamental knowledge questions on the theory presented in the respective chapter, followed by calculation problems. In total, over 80 such calculation problems are provided, along with brief solutions for each. This book is especially designed to meet the needs of Australian students, reviewing the mathematics covered in their first two years at university. The 13-week course comprises three hours of lectures and two hours of tutorials per week. |
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Автор: Williams
Дата: 17 апреля 2020
Просмотров: 5 066 |
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CSI SAP2000 v22.0.0 build 1587 x64
CSI SAP2000 - cистема трехмерного статического и динамического анализа методом конечных элементов и проектирования сооружений.
SAP2000 следует принципам, основными чертами которых являются современный, интуитивно понятный и универсальный пользовательский интерфейс, основанный на уникальном расчетном ядре и инструментах проектирования конструкций для инженеров, разрабатывающих объекты транспортной инфраструктуры, промышленные и гражданские здания, спортивные сооружения и другие объекты.
Начиная с трехмерной объектно-ориентированной рабочей среды моделирования и до широчайшего спектра опций расчета и проектирования конструкций, комплексно интегрированных в один мощный пользовательский интерфейс, SAP2000 – это наиболее интегрированный, производительный и практичный расчетный комплекс общего назначения, существующий на сегодняшнем рынке. Интуитивно понятный интерфейс позволяет Вам создавать модели конструкций в кратчайшие сроки без долгого процесса обучения. Сегодня Вы можете использовать SAP2000 для всех Ваших задач по расчету и проектированию, в том числе и для небольших повседневных задач.
Комплексные модели могут быть созданы и разбиты на конечные элементы с использованием встроенных шаблонов. Интегрированные инструменты проектирования конструкций способны автоматически сгенерировать ветровые, волновые, нагрузки от транспорта и сейсмические нагрузки на модель, а также выполнить полную автоматическую проверку стальных и железобетонных элементов согласно нормам проектирования различных стран.
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Автор: Williams
Дата: 16 апреля 2020
Просмотров: 2 944 |
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Strand7 R2.4.6 + Webnotes
Strand7's fully-integrated visual environment - combined with a suite of powerful solvers - gives you unparalleled functionality in a single application. Construct models, run analyses and investigate results simultaneously using a seamless interface. Strand7 lets you build models quickly. Create, delete and manipulate elements with a comprehensive set of tools, automatic meshing and unlimited undo. Organise a complicated model into a simple set of parts using the Group Tree. Define your own coordinate systems and beam cross-sections. Check mesh quality with aspect ratio and warping contours and free edge detection. Strand7 harnesses the power of Windows. Open multiple models at the same time. Cut-and-paste elements in 3D - even between models - and copy data to and from other Windows® programs. Import geometry data from IGES, ACIS, STEP and DXF files. Choose drawing styles and colours. Set the physical units for viewing and entering data. Dynamically rotate, pan and zoom in real time with a single click. Strand7 gives you a range of result options. Visualise results with contour maps, vector maps and X-Y graphs. Use the Peek tool to inspect result quantities at any point, directly on the model. View, sort and filter results with the Result Listings spreadsheet. Strand7 offers a full set of previewing and printing tools for documenting and reporting your work. Choose your own fonts, titleblocks and logos for a consistent, professional look across all your printing.
Extensive element library
- 1D: Beam, truss, pipe, spring, damper, connection, catenary cable and contact elements (2D and 3D)
- 2D: Plane stress, plane strain, plate/shell, 3D membrane, shear panel and axisymmetric elements
- 3D: Tetrahedral, wedge, pyramid and hexahedral elements
- Constraints: Rigid links, pinned links, master/slave links, sector-symmetry links, coupling links, attachment links
Comprehensive range of solvers
- Static: Linear, buckling, influence and non-linear (geometric, material and boundary non-linearity)
- Dynamic: Natural frequency, harmonic response and spectral response
- Transient: Linear and non-linear (geometric, material and boundary non-linearity)
- Heat transfer: Steady-state and transient (linear and non-linear)
Standard and specialist materials
- Linear and non-linear material models, including: Isotropic, orthotropic, anisotropic, soil, rubber, composite laminates and user-defined materials
Industry-standard data libraries
- Materials: Engineering properties for common materials - steel, timber, aluminium, concrete and glass
- Sections: Industry-standard cross-sections, including I-beams, tubes, channels and angles
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Автор: Williams
Дата: 15 апреля 2020
Просмотров: 4 098 |
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Autodesk Inventor Nastran (ex. In-CAD) 2021 x64
Autodesk Inventor Nastran - программный комплекс для расчетов задач механики твердого деформируемого тела, основанный на методе конечных элементов. Решатель Nastran является одним из лучших решателей для задач механики деформируемого тела.
Задачи, которые позволяет рассчитывать программный комплекс Autodesk Inventor Nastran:
- линейный и нелинейный статический анализ;
- расчет устойчивости;
- модальный анализ;
- стационарный и нестационарный тепловой расчет;
- расчет композитных материалов;
- расчет температурных напряжений;
- тепловой расчет с нелинейными граничными условиями;
- отклик на случайные частотные нагрузки;
- расчет вынужденных колебаний;
- расчет динамических нагрузок;
- расчет пластических и гиперупругих свойств;
- расчет падения тела.
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Автор: Williams
Дата: 14 апреля 2020
Просмотров: 1 792 |
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Paul Chess, Warren Green - Durability of Reinforced Concrete Structures
CRC Press, 2020
pdf, 149 pages, english
ISBN-13: 978-0-367-27838-0
Reinforced concrete structures corrode as they age, with significant financial implications, but it is not immediately clear why some are more durable than others. This book looks at the mechanisms for corrosion and how corrosion engineering can be used for these problems to be minimized in future projects. Several different examples of reinforced concrete structures with corrosion problems are described and the various life enhancement solutions considered and applied are discussed. The book includes a chapter on the effectiveness of corrosion monitoring techniques and questions why the reality is at odds with current theory and standards.
Specialist contractors, consultants and owners of corrosion damaged structures will find this an extremely useful resource. It will also be a valuable reference for students at postgraduate level. |
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