Download or read book Seismic Design Optimization of Steel Structures Using Genetic Algorithm written by Tiancheng Wang and published by . This book was released on 2020 with total page 85 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Genetic Algorithm (GA) was selected for application to design optimization of braced steel moment resisting frame (MRF) structures. A MATLAB program was developed that uses GA for diagonal braces optimization of two-dimensional three-story and nine-story frame structures. The soGA program was used to find an optimal solution from a large search space with different design variables in a reasonable length of time with a fully automated process. Established computational models can simulate the nonlinear behavior of 3- and 9-story steel MRFs under different earthquakes by using OpenSees software. Plastic hinges and Bilin material were used to simulate the plastic stage of Reduced Beam Section (RBS) during nonlinear time history analyses. The final design obtained by the soGA program was compared to the base structures without braces, in terms of maximum story drift ratio and maximum floor acceleration during nonlinear time history seismic analyses.

Download or read book Structural Seismic Design Optimization and Earthquake Engineering Formulations and Applications written by Plevris, Vagelis and published by IGI Global. This book was released on 2012-05-31 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Throughout the past few years, there has been extensive research done on structural design in terms of optimization methods or problem formulation. But, much of this attention has been on the linear elastic structural behavior, under static loading condition. Such a focus has left researchers scratching their heads as it has led to vulnerable structural configurations. What researchers have left out of the equation is the element of seismic loading. It is essential for researchers to take this into account in order to develop earthquake resistant real-world structures. Structural Seismic Design Optimization and Earthquake Engineering: Formulations and Applications focuses on the research around earthquake engineering, in particular, the field of implementation of optimization algorithms in earthquake engineering problems. Topics discussed within this book include, but are not limited to, simulation issues for the accurate prediction of the seismic response of structures, design optimization procedures, soft computing applications, and other important advancements in seismic analysis and design where optimization algorithms can be implemented. Readers will discover that this book provides relevant theoretical frameworks in order to enhance their learning on earthquake engineering as it deals with the latest research findings and their practical implementations, as well as new formulations and solutions.

Download or read book Probabilistic Performance based Seismic Design Automation of Nonlinear Steel Structures Using Genetic Algorithms written by Arzhang Alimoradi and published by . This book was released on 2004 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Structural Optimization written by Franklin Y. Cheng and published by CRC Press. This book was released on 2017-12-21 with total page 814 pages. Available in PDF, EPUB and Kindle. Book excerpt: Today’s biggest structural engineering challenge is to design better structures, and a key issue is the need to take an integrated approach which balances control of costs with the requirement for handling earthquakes and other dynamic forces. Structural optimization is based on rigorous mathematical formulation and requires computation algorithms for sizing structural elements and synthesizing systems. Now that the right software and enough computing power are readily available, professionals can now develop a suite of alternative designs and a select suitable one. A thoroughly-written and practical book on structural optimization is long overdue. This solid book comprehensively presents current optimization strategies, illustrated with sufficient examples of the design of elements and systems and presenting descriptions of the process and results. Emphasis is given to dynamic loading, in particular to seismic forces. Researchers and practising engineers will find this book an excellent reference, and advanced undergraduates or graduate students can use it as a resource for structural optimization design.

Download or read book Optimum Seismic Design of Steel Buildings Using Genetic Algorithms written by Salah R. Al Zaidee and published by . This book was released on 2017-05-19 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Metaheuristic Applications in Structures and Infrastructures written by Siamak Talatahari and published by Elsevier Inc. Chapters. This book was released on 2013-01-31 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Optimization of Structural and Mechanical Systems written by Jasbir S. Arora and published by World Scientific. This book was released on 2007 with total page 610 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a discussion of the general impact of WTO membership on both sides of the Taiwan Strait, and addresses the political and economic impact on cross-Strait relations of common membership. The book begins with an introduction which analyzes the state of cross-Strait economic and political relations on the eve of dual accession to the WTO and briefly introduces the chapters which follow. The first chapter discusses the concessions made by both sides in their accession agreements and is followed by two chapters which describe the manner in which the Taiwan economy was reformed to achieve compliance as well as the specific, restrictive trade regime that was put into place to manage mainland trade. The next two chapters deal with the implications of that restrictive trade regime for the Taiwan economy in Asia and with the nature of the interactions between the two sides within the WTO. The final four chapters of the volume examine the impact of membership on four sectors of the economy: finance; agriculture; electronics and automobiles. There is a post-script which briefly covers developments since the chapters were completed.

Download or read book Recent Advances in Optimal Structural Design written by Scott A. Burns and published by ASCE Publications. This book was released on 2002-01-01 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sponsored by the Technical Committee on Structural Design of the Technical Administrative Committee on Analysis and Computation of the Technical Activities Division of the Structural Engineering Institute of ASCE. This report documents the dramatic new developments in the field of structural optimization over the last two decades. Changes in both computational techniques and applications can be seen by developments in computational methods and solution algorithms, the role of optimization during the various stages of structural design, and the stochastic nature of design in relation to structural optimization. Topics include: Ømethods for discrete variable structural optimization; Ødecomposition methods in structural optimization; Østate of the art on the use of genetic algorithms in design of steel structures; Øconceptual design optimization of engineering structures; Øtopology and geometry optimization of trusses and frames; Øevolutionary structural optimization; Ødesign and optimization of semi-rigid framed structures; Øoptimized performance-based design for buildings; Ømulti-objective optimum design of seismic-resistant structures; and Øreliability- and cost-oriented optimal bridge maintenance planning. The book concludes with an extensive bibliography of journal papers on structural optimization published between 1987 and 1999.

Download or read book Seismic Design Methods for Steel Building Structures written by George A. Papagiannopoulos and published by Springer Nature. This book was released on 2022-01-01 with total page 519 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book, after two introductory chapters on seismic design principles and structural seismic analysis methods, proceeds with the detailed description of seismic design methods for steel building structures. These methods include all the well-known methods, like force-based or displacement-based methods, plus some other methods developed by the present authors or other authors that have reached a level of maturity and are applicable to a large class of steel building structures. For every method, detailed practical examples and supporting references are provided in order to illustrate the methods and demonstrate their merits. As a unique feature, the present book describes not just one, as it is the case with existing books on seismic design of steel structures, but various seismic design methods including application examples worked in detail. The book is a valuable source of information, not only for MS and PhD students, but also for researchers and practicing engineers engaged with the design of steel building structures.

Download or read book Harmony Search Algorithms for Structural Design Optimization written by Zong Woo Geem and published by Springer Science & Business Media. This book was released on 2009-09-28 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: Various structures, such as buildings, bridges, and paved roads play an important role in our lives. However, these construction projects require large expenditures. Designing infrastructure cost-efficiently while satisfying all necessary design constraints is one of the most important and difficult tasks for a structural engineer. Traditionally, mathematical gradient-based optimization techniques have been applied to these designs. However, these gradient-based methods are not suitable for discrete design variables such as factory-made cross sectional area of structural members. Recently, researchers have turned their interest to phenomenon-mimicking optimization techniques because these techniques have proved able to efficiently handle discrete design variables. One of these techniques is harmony search, an algorithm developed from musical improvisation that has been applied to various structural design problems and has demonstrated cost-savings. This book gathers all the latest developments relating to the application of the harmony search algorithm in the structural design field in order for readers to efficiently understand the full spectrum of the algorithm’s potential and to easily apply the algorithm to their own structural problems. This book contains six chapters with the following subjects: standard harmony search algorithm and its applications by Lee; standard harmony search algorithm for steel frame design by Degertekin; adaptive harmony search algorithm and its applications by Saka and Hasançebi; harmony particle swarm algorithm and its applications by Li and Liu; hybrid algorithm of harmony search, particle swarm & ant colony for structural design by Kaveh and Talatahari; and parameter calibration of viscoelastic and damage functions by Mun and Geem.

Download or read book Proceedings of International Conference on ICT for Sustainable Development written by Suresh Chandra Satapathy and published by Springer. This book was released on 2016-02-25 with total page 787 pages. Available in PDF, EPUB and Kindle. Book excerpt: The two volumes of this book collect high-quality peer-reviewed research papers presented in the International Conference on ICT for Sustainable Development (ICT4SD 2015) held at Ahmedabad, India during 3 – 4 July 2015. The book discusses all areas of Information and Communication Technologies and its applications in field for engineering and management. The main focus of the volumes are on applications of ICT for Infrastructure, e-Governance, and contemporary technologies advancements on Data Mining, Security, Computer Graphics, etc. The objective of this International Conference is to provide an opportunity for the researchers, academicians, industry persons and students to interact and exchange ideas, experience and expertise in the current trend and strategies for Information and Communication Technologies.

Download or read book Topological Structural Design Optimization Using Genetic Algorithms written by David Jeffrey Webb and published by . This book was released on 2002 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Multiobjective Optimum Design of Static and Seismic resistant Structures with Genetic Algorithm Fuzzy Logic and Game Theory written by Dan Li and published by . This book was released on 1997 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The goal of this research is to develop a constrained multiobjective optimization method in the form of a robust, practical, problem-independent algorithm, and to investigate the effect of multiobjective optimization on structural design. This research studies the properties and characteristics of multiobjective optimization and solutions. Design objectives, constraints and design variables as well as their effect on structural design and behaviors are investigated. Dynamic input energy for a multidegree-of-freedom structure is formulated. A multiobjective optimization algorithm based on game theory is developed. Fuzzy set theory is introduced to construct a fuzzy constrained environment. A Pareto genetic algorithm is developed based on a simple genetic algorithm. Two new genetic algorithm operators -- multiobjective fitness function and niche method -- are proposed. A new genetic algorithm process -- Pareto set filter -- is added to genetic algorithms. Finally, a multiobjective optimization algorithm, which is robust and performs uniformly well on a broad range of problems, is developed with genetic algorithm, fuzzy logic and game theory. Six frame structures and five truss structures have been optimally designed with static load, seismic excitation, and active control. Materials for the structures are steel, reinforced concrete, and a combination of both. Optimization goals cover weight, structural cost, displacement, strain energy, input energy, potential energy, and performance index. Constraints include stress, displacement, frequency, and ratio of story stiffness. The numerical results show that the newly developed algorithms can locate a global solution and Pareto optimum set which are usually difficult to find"--Abstract, leaf iii.

Download or read book Advances in Structural Engineering Optimization written by Sinan Melih Nigdeli and published by Springer Nature. This book was released on 2020-12-04 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is an up-to-date source for computation applications of optimization, prediction via artificial intelligence methods, and evaluation of metaheuristic algorithm with different structural applications. As the current interest of researcher, metaheuristic algorithms are a high interest topic area since advance and non-optimized problems via mathematical methods are challenged by the development of advance and modified algorithms. The artificial intelligence (AI) area is also important in predicting optimum results by skipping long iterative optimization processes. The machine learning used in generation of AI models also needs optimum results of metaheuristic-based approaches. This book is a great source to researcher, graduate students, and bachelor students who gain project about structural optimization. Differently from the academic use, the chapter that emphasizes different scopes and methods can take the interest and help engineer working in design and production of structural engineering projects.

Download or read book An Artificial Intelligence Framework for Multi disciplinary Design Optimization of Steel Buildings written by Filippo Ranalli and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation describes the development of a new AI-driven multi-disciplinary structural design optimization (MDSDO) software framework to automate the design of the structural sub-systems of typical steel buildings, comprised of the composite floor system, the lateral system, and their respective connections, adopting a minimum-cost objective function, and meeting the relevant strength, drift, vibration, constructability, and ductility constraints per U.S. building code, design manuals, and industry standards. The cost objective function accounts for material, fabrication, and erection rates, and is evaluated through estimation models assembled with guidance provided by general contractors and steel fabricators in the U.S. who agreed to contribute up-to-date cost data, which is typically difficult to access for researchers. The core challenges of developing such a design tool revolve around the size of the optimization problem in terms of number of constraints, objective complexity, and design domain, as well as the need for software modularity to target specific structural sub-systems, while striving for the ease of adoption of this technology for new design in industry. Computational scalability to full-sized structures is also a key requirement to address, together with designing a way to incorporate accurate project-specific cost data in order to find minimum-cost solutions. In the proposed framework, the approach adopted to solve the optimization of steel buildings is to decompose the full design problem into three decoupled software modules in Python which are then solved individually with divide and conquer algorithmic solutions, coordinated through a multi-disciplinary architecture. The research approach focuses on the separate development and testing of each of the modules of the architecture on smaller benchmark sub-systems, progressively building software infrastructure to connect the stand-alone optimizations so as to run them collaboratively, with a focus on full-building design optimality, algorithmic run-time, and scalability. Both classic and more recent Artificial Intelligence methods play a key role across the optimization modules on the choice and design of the algorithms, as well as on the software engineering aspects for augmented computational efficiency. The optimization of each module is preceded by a series of automated pre-processing steps to parse and store the geometric, structural, and loading features of the Building Information Model (BIM) or Finite Element Analytical (FEA) model. Subsequently, the framework modules, one for each of the key structural sub-systems, may be run sequentially to automate the full design end-to-end, or as stand-alone logic to optimize select sub-systems in the structure. The first module performs the composite floor system design, in which each girder, filler beam, and column subjected to construction and ultimate gravity loads is sized to meet a series of constraints. Through dynamic programming, the algorithm exhaustively explores all feasible solutions in an engineer-specified discrete domain of slab and concrete properties, wide flange sections, degree of composite action, number of studs, camber, and shoring, and ultimately selects the most economical option. The second logic component automates the design optimization of the lateral frame system to withstand the seismic and wind load demands per building code regulations, using an innovative energy-based algorithm to envelope the critical load combinations and determine the cost-optimal sizes. Lastly, the third stand-alone software module of MDSDO consists of a connection optimization engine, whose functionality is to size and detail each individual gravity and lateral connection based on the load demands using non-linear solvers, yielding a design with better economy than the traditional schedule-based approach by which each connection is conservatively sized based solely on the geometry of its connecting elements. Validation of the optimization framework is illustrated by running each of the sub-system optimization modules of the multi-disciplinary architecture sequentially on an existing 4-story steel building in California subjected to gravity, wind, and seismic loading, with fine-tuned cost parameters and an analytical model assembled with guidance from the general contractor and structural engineer on the project. When compared to the original design, the results of the MDSDO show total steel cost savings of approximately 10%, with individual sub-system savings between 5 and 55%, amongst which the gravity connections show the largest potential for savings, and with a design run-time in the order of a few hours versus several weeks. The most cost-impacting structural feature differences between the original design and the optimization output are the reductions in shear studs, shear bolts, stiffener plates, shear plate dimensions, weld volume, and moment frame weight. A parametric study is furthermore conducted to understand to what extent varying slab and deck heights, composite moment frame girder action, and concrete type from the original design choices might affect the total cost. The most important theoretical improvement of the MDSDO framework over existing structural optimization methods in the literature is the capability to scale to full-size steel buildings, accounting for the full set of relevant strength, stiffness, vibration, ductility, and constructability prescriptions. These constraints are interpreted from U.S. codes and manuals, re-formulated with compact mathematical notation, and subsequently expressed in computer code. Scalability is achieved by reducing the design domain to realistic discrete values, and by designing new efficient algorithms for each of the gravity, lateral, and connection sub-systems. Moreover, the MDSDO relies on a cost objective function which is more complex and adaptable than the classic weight minimization approach, as it accounts for material, labor, and equipment rates sampled from industry data, which are used to estimate each of the detailing components of the structural sub-system designs. The modularity, interpretability, and ease of use of the MDSDO favors its applicability to new design of commercial, medical, and residential steel buildings with minimal additional effort from the engineer's part. The MDSDO is expected to impact industry by providing total installed cost reductions on steel frames ranging between 9% and 20%, the lower bound of which is deduced from the case study results of this dissertation, while the upper bound is estimated for projects whose budget is on the higher end of the spectrum. Moreover, the MDSDO is able to generate a feasible and cost-optimal design of a new building in the order of a few hours, thus allowing the engineer to save weeks of design time, resulting in a rather competitive edge, and when appropriate, the added ability to pursue the more advanced and time-consuming aspects of Performance-Based Engineering (PBE). The MDSDO also provides an additional layer of safety by automating the design checks, while also helping prevent issues with constructability by enforcing a series of constraints on relative member sizes. The author predicts that the adoption of the MDSDO in elastic design in industry may provide benefit to the owner, structural engineer, and general contractor, while potentially reducing the environmental impact of construction by identifying lighter solutions with reduced construction time.

Download or read book Seismic Design of Steel Structures written by Victor Gioncu and published by CRC Press. This book was released on 2013-11-20 with total page 525 pages. Available in PDF, EPUB and Kindle. Book excerpt: Providing real world applications for different structural types and seismic characteristics, Seismic Design of Steel Structures combines knowledge of seismic behavior of steel structures with the principles of earthquake engineering. This book focuses on seismic design, and concentrates specifically on seismic-resistant steel structures. Drawing o

Download or read book Fuzzy Discrete Multicriteria Cost Optimization of Steel Structures Using Genetic Algorithm written by Kamal Chandra Sarma and published by . This book was released on 2001 with total page 506 pages. Available in PDF, EPUB and Kindle. Book excerpt: