Publication: DISEÑO DE UN EDIFICIO DE DIECIOCHO PISOS ESTRUCTURADO CON MUROS MECEDORES Y COMPARACIÓN CON UNO TRADICIONAL
Date
2017
Authors
NEIRA BUSTAMANTE, GASPAR ISMAEL
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Los muros de hormigón armado son resistentes a fuerzas laterales y su rigidez controla susdesplazamientos. La filosofía tradicional de diseño sísmico acepta daño estructural ante unsismo de gran intensidad, paradigma que se ha cambiado en los últimos años debido al altocosto que implica la reparación y al largo tiempo de desocupación de un edificio dañado.En Chile se ha observado que los edificios estructurados con muros fundados sobre suelofirme han respondido prácticamente sin daño, siendo posible garantizar una ocupacióninmediata, sin embargo, en zonas de suelo blando se espera daño en las zonas críticas,requiriéndose una reparación posterior.Para eliminar el daño estructural se ha propuesto un sistema de muros mecedores, análogoa los sistemas de vigas prefabricadas con uniones postensadas. Durante un sismo el murorota esencialmente como cuerpo rígido, levantándose y quedando apoyado en el bordecomprimido, cables postensados aseguran que el muro vuelva a su posición inicialformando un sistema autocentrado. Para disipar energía se pueden usar barras de acerodulce o agregar disipadores externos.Los muros mecedores han sido ampliamente ensayados, entre otros por N. Priestley, S.Pampanin, J. Restrepo, T. Holden, Y. Kurama, originándose guías de diseño.El objetivo de esta memoria es diseñar un edificio existente utilizando muros mecedores ycomparar la respuesta de esta estructura con el comportamiento del edificio estructuradocon muros tradicionales de hormigón armado.Se realiza una revisión bibliográfica, seleccionando las investigaciones más relevantes y seaplican los criterios de diseño de los documentos PRESSS, NZCS, ACI ITG5.2-2009 y Kurama.Los diseños resultantes se evalúan con un análisis dinámico no lineal, utilizando elprograma RUAUMOKO 2D con registros de diferente capacidad destructiva.
Reinforced concrete walls as a structural system to resist lateral forces have an importantstiffness that contributes to control lateral displacements during an earthquake. Thetraditional philosophy of seismic designs allows structural damage for a big intensityearthquake, this paradigm has been changed in the last years due to the high costs ofreparations, damage to the content and loss of profits. In Chile it has been observed thatbuildings with R/C walls as main structural system, founded on firm soils, have respondedwith almost not damage, making possible to have an immediate occupation, nevertheless,on soft soils damage is expected in critical zones, making necessary an after reparation.Rocking Wall systems have been proposed to eliminate structural damage, based onprefabricated concrete beams with posttensioned joins system. During an earthquake, wallrotates like a stiff body, rising himself and standing on the compressed edge, post tensionedtendons ensure that the wall will come back to his initial position making an auto centeredsystem. To dissipate the energy, mild steel or external energy dissipaters can be provide.The Rocking walls system has been largely studied by N. Priestley, S. Pampanin, J. Restrepo,T. Holden, Y. Kurama et al, allowing the creation of guidelines to rocking walls systemdesign.Design an existent building using rocking walls is the main objective of this work. The newstructural system is compared to a similar building but with traditional reinforced concretewalls.A bibliographic review is presented, showing the most relevant investigations that havebeen made. Design dispositions from PRESSS, NZCS, ACI ITG5.2-2009 and Kuramadocuments have been applied.The seismic responses of the two cases of studies have been evaluated with a non-lineardynamic analysis, using the RUAUMOKO 2D software, using different destructive capacityrecords.
Reinforced concrete walls as a structural system to resist lateral forces have an importantstiffness that contributes to control lateral displacements during an earthquake. Thetraditional philosophy of seismic designs allows structural damage for a big intensityearthquake, this paradigm has been changed in the last years due to the high costs ofreparations, damage to the content and loss of profits. In Chile it has been observed thatbuildings with R/C walls as main structural system, founded on firm soils, have respondedwith almost not damage, making possible to have an immediate occupation, nevertheless,on soft soils damage is expected in critical zones, making necessary an after reparation.Rocking Wall systems have been proposed to eliminate structural damage, based onprefabricated concrete beams with posttensioned joins system. During an earthquake, wallrotates like a stiff body, rising himself and standing on the compressed edge, post tensionedtendons ensure that the wall will come back to his initial position making an auto centeredsystem. To dissipate the energy, mild steel or external energy dissipaters can be provide.The Rocking walls system has been largely studied by N. Priestley, S. Pampanin, J. Restrepo,T. Holden, Y. Kurama et al, allowing the creation of guidelines to rocking walls systemdesign.Design an existent building using rocking walls is the main objective of this work. The newstructural system is compared to a similar building but with traditional reinforced concretewalls.A bibliographic review is presented, showing the most relevant investigations that havebeen made. Design dispositions from PRESSS, NZCS, ACI ITG5.2-2009 and Kuramadocuments have been applied.The seismic responses of the two cases of studies have been evaluated with a non-lineardynamic analysis, using the RUAUMOKO 2D software, using different destructive capacityrecords.
Description
Catalogado desde la version PDF de la tesis.
Keywords
MUROS MECEDORES , POSTENSADOS , UNION HIBRIDA