V WMSSE

Abstracts

Abstract information

English title:	Computational analysis of structure manufactured by means of the steel framing system. Case study: industrial warehouse
Spanish title:	An�lisis computacional de estructura fabricada mediante el sistema steel framing. Caso de estudio: dise�o de nave industrial
English abstract:	Steel Framing is characterized by being a construction system that uses low-thickness galvanized steel profiles that are used by shape and not by mass. In these systems, the joints are screwed, which reduces manufacturing and assembly times. This system is traditionally designed assuming that the beam-column joints are ideally pinned or fully rigid. This simplifies the structural analysis and design processes but at the expense of not obtaining a detailed understanding of the behavior of the joints, which have a finite stiffness and are therefore semi-rigid. Surovek-Maleck and White 2004 analyzed the direct methods to evaluate the resistance of components of Steel Frame systems through new computational methods used in finite elements. These analysis and design approaches range from simple elastic methods to procedures that remove constraints to solve more realistic cases. These approaches conclude a greater benefit in design practice. Simple elastic procedures are necessary for rapid preliminary design, while advanced methods provide a means to approach non-routine problems with greater confidence and computational support. This research work approaches a comparative analysis of the traditional construction system of industrial buildings, which is characterized using hot-rolled steel profiles, and industrial buildings with the Steel Framing system, which uses cold-formed steel profiles and thickness reduced. As Steel Framing is a modern system in our region, it is not common to find industrial warehouses built using this system. This study contemplates computational design manufacturing and assembly aspects. In addition, the seismic resistance of the structure was analyzed to evaluate its behavior in high seismic risk areas, such as the coastal region of Ecuador. The design proposal was based on the identification of the needs of the system to be built, starting with the dimensions of the industrial warehouse (12 m of span, 6 m of height, and 30 m of length). Subsequently, the loads that will act on the structure were defined following the recommendations of the Ecuadorian construction standards, those of the American Iron and Steel Institute, the technical standard E.020 of Peru, the ASCE design recommendations /SEI 7-16, NACE-SSPC and AWS standards for surface preparation for welding. The structural design was carried out through analytical calculations and simulation methods using finite elements, to compare the response and structural behavior between the two systems. In the same way, a comparison of the times, materials, and tools used for the assembly in each system was made. Finally, the similarities and differences between these construction systems were established and a technical-economic study was carried out to evaluate the economic viability and determine their advantages and disadvantages. Among the most significant results, it has been verified that the Steel Frame system is a system resistant to strong winds, earthquakes, and other loads that are strengthened in the NEC-SE-CG, NEC-SE-DS, NEC-SE-AC, and NEC-SE-GC standards. The demand/capacity ratio of the members reached a maximum of 0.676 (67%), which showed that it is possible to safely support higher loads than those applied. The drift results also show the system's seismic resistance, reaching a maximum value of 0.00107, which represents 5.37% of the value allowed in the standard.
Spanish abstract:	El Steel Framing se caracteriza por ser un sistema constructivo que utiliza perfiles de acero galvanizado de bajo espesor que trabajan por forma y no por masa. En estos sistemas las uniones son generalmente atornilladas, lo que permite reducir tiempos de fabricaci�n y montaje. Este sistema se dise�a tradicionalmente asumiendo que las uniones viga-columna est�n idealmente articuladas o totalmente r�gidas. Esto simplifica los procesos de an�lisis y dise�o estructural, pero a expensas de no obtener un conocimiento detallado del comportamiento de las juntas, que en realidad tienen una rigidez finita y por tanto son semirr�gidas. Surovek-Maleck and White en 2004 analizan los m�todos directos para evaluar la resistencia de componentes de los sistemas Steel Frame mediante nuevos m�todos computacionales empleando elementos finitos. Estos enfoques de an�lisis y dise�o van desde m�todos el�sticos simples hasta procedimientos que eliminan restricciones con la finalidad de solucionar casos m�s real�sticos. Estos enfoques proporcionan mayor beneficio en la pr�ctica del dise�o. Los procedimientos el�sticos simples son necesarios para un dise�o preliminar r�pido, mientras que los m�todos avanzados brindan un medio para abordar problemas no rutinarios con mayor confianza y con apoyo computacional. Este trabajo de investigaci�n aborda un an�lisis comparativo entre el sistema tradicional de construcci�n de naves industriales, que se caracteriza por el empleo de perfiles de acero laminados en caliente, y naves industriales con sistema Steel Framing, que utiliza perfiles de acero conformados en fr�o y de reducido espesor. Al ser el Steel Framing un sistema relativamente moderno en nuestra regi�n, no es com�n encontrar naves industriales construidas empleando este sistema. Este estudio contempla el dise�o computacional y aspectos de fabricaci�n y montaje. Adem�s, se analiz� la sismorresistencia de la estructura para evaluar su comportamiento en zonas de alto riesgo s�smico, como la regi�n costera del Ecuador. La propuesta de dise�o se bas� en la identificaci�n de las necesidades del sistema a construir, empezando por las dimensiones de la nave (12 m de luz, 6 m de altura y 30 m de longitud). Posteriormente se definieron las cargas que act�an en la estructura siguiendo las recomendaciones de las normas ecuatorianas de la construcci�n, las del instituto americano de hierro y acero, la norma t�cnica E.020 de Per�, las recomendaciones de dise�o ASCE/SEI 7-16, las normas de preparaci�n de superficies NACE-SSPC y las de la AWS para soldadura. El dise�o estructural se realiz� mediante c�lculos anal�ticos y metodolog�as de simulaci�n empleando elementos finitos, para comparar la respuesta y comportamiento estructural entre los dos sistemas. De la misma manera, se realiz� una comparaci�n de los tiempos, materiales y herramientas utilizadas para el montaje en cada sistema. Finalmente se establecieron las semejanzas y diferencias entre estos sistemas constructivos y se elabor� un estudio t�cnico-econ�mico para evaluar la viabilidad econ�mica y determinar sus ventajas y desventajas. Entre los resultados m�s significativos se ha comprobado que el sistema Steel Frame es un sistema resistente a fuertes vientos, sismos y dem�s cargas que se establecen en las normativas NEC-SE-CG, NEC-SE-DS, NEC-SE-AC y NEC-SE-GC. La relaci�n demanda/capacidad de los miembros estructurales alcanz� un m�ximo de 0,676 (67 %), lo que permiti� demostrar que es posible soportar con seguridad mayores cargas a las aplicadas. Los resultados de derivas tambi�n demuestran la sismorresistencia del sistema, alcanzando un valor m�ximo de 0,00107, que representa el 5,37% del valor permitido en la norma.
Topic:
Presentation Type:
Speaker:

Authors

Name	Institution	Email
Jorge Fajardo	Universidad Polit�cnica Salesiana	jfajardo@ups.edu.ec
C�sar A. Palt�n	Universidad Polit�cnica Salesiana	cpaltan@ups.edu.ec
Esteban G. Palacios	Universidad Polit�cnica Salesiana	epalaciosf1@est.ups.edu.ec

Presentation

Room:	Principal Room
Date:	26 July 2022
Hour:	09:20 - 09:40

Back

V WMSSE
V Workshop on Modeling and Simulation for Science and Engineering

Previous editions:
I WMSSE
II WMSSE
III WMSSE
IV WMSSE

Contact information:
info@foristom.org
@FORISTOMFound
FORISTOMFoundation
foristomfoundation
Copyright 2022 FORISTOM
All rights reserved