Controlled structural systems: Design and reliability

1999 ◽  
Vol 6 (1) ◽  
pp. 11-52 ◽  
Author(s):  
M. Battaini
2020 ◽  
Vol 2 (4) ◽  
pp. 469-489
Author(s):  
Elif Ecem Bas ◽  
Mohamed A. Moustafa

Hybrid simulation (HS) is an advanced simulation method that couples experimental testing and analytical modeling to better understand structural systems and individual components’ behavior under extreme events such as earthquakes. Conducting HS and real-time HS (RTHS) can be challenging with complex analytical substructures due to the nature of direct integration algorithms when the finite element method is employed. Thus, alternative methods such as machine learning (ML) models could help tackle these difficulties. This study aims to investigate the quality of the RTHS tests when a deep learning algorithm is used as a metamodel to represent the dynamic behavior of a nonlinear analytical substructure. The compact HS laboratory at the University of Nevada, Reno was utilized to conduct exclusive RTHS tests. Simulating a braced frame structure, the RTHS tests combined, for the first time, linear brace model specimens (physical substructure) along with nonlinear ML models for the frame (analytical substructure). Deep long short-term memory (Deep-LSTM) networks were employed and trained to develop the metamodels of the analytical substructure using the Python environment. The training dataset was obtained from pure analytical finite element simulations for the complete structure under earthquake excitation. The RTHS evaluations were first conducted for virtual RTHS tests, where substructuring was sought between the LSTM metamodel and virtual experimental substructure. To validate the proposed RTHS testing methodology and full system, several actual RTHS tests were conducted. The results from ML-based RTHS were evaluated for different ML models and compared against results from conventional RTHS with finite element models. The paper demonstrates the potential of conducting successful experimental RTHS using Deep-LSTM models, which could open the door for unparalleled new opportunities in structural systems design and assessment.


2020 ◽  
Vol 4 (03) ◽  
pp. 205-233
Author(s):  
Charnele Charnele ; Anastasia Maurina

Abstract - Existence of the need for a semi-permanent or temporary shelters that are easily and quickly built for certain events, for this reason this study explored the potential of transformative wide-span structures with the development and development of usable and reciprocal structural systems in the form of bamboo gridshell roof structures, into an independent arrangement composed of configuration modules with computational assistance according to architectural design needs. This is done by knowing the adequante potential of structural systems, design patterns, and connection systems in several study objects that are evaluated by comparative methods on system structure, connections, trunk character, distribution load, structure locking system, and application. The benefits of research on bamboo research for new materials in the engineering of bamboo materials that can increase the value of Indonesian locality by being able to be used by the community are needed in using bamboo materials for the development of permanent permanent shade. In result, discussion of the criteria for structural systems according to research objectives analysis of the objects of the study where transformation structures based on character structures that can be used as reciprocal structures are supporting systems to provide stability and an independent locking system. both of these structures are flexible and easily duplicated structural systems so that according to the wide span structure, the structural system is designed to make a gridshell. this gridshell form is processed with computational help to effectively create reciprocaldeployable structure systems. The research was explored, experiments were carried out on reciprocal patterns to find the most stable patterns and change the character of straight rods into reciprocal rods that could be deployed using elements such as scissors, which then developed the connection type with potential analyzers and displacement of each connection. The experiment produced a new structural system by collecting the second structural system obtained by a structure that can be transformed, has an independent locking system, and can stretch wide with a gridshell shape. Keywords : reciprocal, deployable, dome, gridshell, transformable


Author(s):  
Robert Smilowitz ◽  
Darren Tennant

Author(s):  
Sergey Zenin ◽  
◽  
Ravil Sharipov ◽  
Oleg Kudinov ◽  
Evgeniy Chistyakov ◽  
...  

Изложены сведения о разработанном проекте свода правил СП «Монолитные конструктивные системы. Правила проектирования». Описана структура проекта СП и приведены основные положения по проектированию конструктивных систем зданий из монолитного железобетона. При разработке проекта СП учтен опыт применения норм предыдущего поколения – СП 52-103-2007 «Железобетонные монолитные конструкции зданий».


Author(s):  
Donya Hameed Ali Al-Anbari ◽  
Bahjet Rashad Shaheen

Architectural and ecological development   model   can be  identified   by  studying genetic evolution of living beings and their surrounding environment, which makes every one of them complement the other, an integral part of it, and the basis of its existence. Architects started to get back to nature to look for the keys for building sustainability, because elements of nature are a   creative, rich, and useful  source  of  inspiration   and   learning   for architects and designers to present sustainable designs. Getting inspired by or simulating living forms should not lead to making exact copies of them. The real lesson is to benefit from the substantial idea and the basis of the natural system composing it. This leads us to the problem of the present study: There are no enough local studies on the importance and role of living nature simulation in terms of shape, composition, and structural systems to create sustainable   systems.  Hypothesis of the  study  is:  the  harmony shown  by natural, organic structures resulting from the integration of shape with structural function can be employed in architecture shapes and structures by merging shape and function in a symbiotic relationship resembling to a great extent biological , genetic development in their re-formations appearing in natural organic structures. Aim   of   the   study:   Discovering   formational   and   environmental   constraints   of elements   of   nature   and   emerging   with   applied   indications   in   the   field   of constructional   systems   simulation   of   living   nature   and   the   possibility   of transferring them to accomplish sustainable architecture. The results and conclusions shows the need , importance and effectiveness of Simulation  the Natural Living Structural Systems to Achieve sustained Architecture ,and the integration of technical solutions to create a balance between the natural environment and the manufacturers and energy exploitation, and the adoption of passive systems and merged with the systems design, integration between nature and technology. Finally we got that the final conclusions and practical framework and recommendations.


2011 ◽  
Author(s):  
Karen Feigh ◽  
Zarrin Chua ◽  
Chaya Garg ◽  
Alan Jacobsen ◽  
John O'Hara ◽  
...  

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