Centro Experimental de Ingenieríahttps://ridda2.utp.ac.pa/handle/123456789/24422024-03-28T09:04:30Z2024-03-28T09:04:30ZInstrumentación sísmica en Panamá y proyecciones futurasMéndez, RosalínVargas, Ramirohttps://ridda2.utp.ac.pa/handle/123456789/180632023-08-22T18:37:27Z2017-11-17T00:00:00ZInstrumentación sísmica en Panamá y proyecciones futuras
Méndez, Rosalín; Vargas, Ramiro
Los orígenes de la instrumentación sísmica en Panamá se remontan a la época de la construcción del Canal de Panamá, siendo este país el primero del Hemisferio Occidental que contó con un sismógrafo, el cual fue instalado por la Compañía Universal del Canal de Panamá, el cual registró el terremoto ocurrido en el área de San Blas en 1882 (Instituto de Geociencias - UP, 2011). No obstante, las iniciativas modernas para la instrumentación de las estructuras en Panamá se inician a mediados de los 90’s cuando se intensifica la construcción de edificios altos, especialmente en la capital del país, y se regula por primera vez la instrumentación de las estructuras con acelerógrafos.
Es así que desde la emisión del Reglamento para el Diseño Estructural de 1994 (REP-94) se incluye el requerimiento para la instrumentación de estructuras. Cabe destacar que este reglamento toma como referencia guías y estándares norteamericanos, como lo son los del American Concrete Institute, American Society of Civil Engineers, American Institute of Steel Construction, ASTM International, entre otros. Estos estándares han sido adoptados con o sin modificaciones; por esta razón, una revisión de los criterios utilizados en el diseño y construcción de las estructuras, basada en data experimental permitiría calibrar las normativas considerando las prácticas estándares.
Este documento expone la evolución ocurrida en Panamá sobre la instrumentación de estructuras, resultados relevantes que motivaron la actualización de algunas normas, inclusión de nuevas variables que no habían sido consideradas y el establecimiento de necesidades para mejorar la calidad de la información. Además, se describe el estado actual y la propuesta para el desarrollo del proyecto cuyos resultados deben impactar en el mejoramiento de las metodologías de diseño y prácticas de construcción.
Los orígenes de la instrumentación sísmica en Panamá se remontan a la época de la construcción del Canal de Panamá, siendo este país el primero del Hemisferio Occidental que contó con un sismógrafo, el cual fue instalado por la Compañía Universal del Canal de Panamá, el cual registró el terremoto ocurrido en el área de San Blas en 1882 (Instituto de Geociencias - UP, 2011). No obstante, las iniciativas modernas para la instrumentación de las estructuras en Panamá se inician a mediados de los 90’s cuando se intensifica la construcción de edificios altos, especialmente en la capital del país, y se regula por primera vez la instrumentación de las estructuras con acelerógrafos.
Es así que desde la emisión del Reglamento para el Diseño Estructural de 1994 (REP-94) se incluye el requerimiento para la instrumentación de estructuras. Cabe destacar que este reglamento toma como referencia guías y estándares norteamericanos, como lo son los del American Concrete Institute, American Society of Civil Engineers, American Institute of Steel Construction, ASTM International, entre otros. Estos estándares han sido adoptados con o sin modificaciones; por esta razón, una revisión de los criterios utilizados en el diseño y construcción de las estructuras, basada en data experimental permitiría calibrar las normativas considerando las prácticas estándares.
Este documento expone la evolución ocurrida en Panamá sobre la instrumentación de estructuras, resultados relevantes que motivaron la actualización de algunas normas, inclusión de nuevas variables que no habían sido consideradas y el establecimiento de necesidades para mejorar la calidad de la información. Además, se describe el estado actual y la propuesta para el desarrollo del proyecto cuyos resultados deben impactar en el mejoramiento de las metodologías de diseño y prácticas de construcción.
2017-11-17T00:00:00ZSeismic Response of Single-Degree-of-Freedom (SDOF) Structural Fuse SystemsVargas, RamiroBruneau, Michelhttps://ridda2.utp.ac.pa/handle/123456789/28162021-07-06T15:34:47Z2004-06-26T00:00:00ZSeismic Response of Single-Degree-of-Freedom (SDOF) Structural Fuse Systems
Vargas, Ramiro; Bruneau, Michel
Passive energy dissipation (PED) devices have been implemented to enhance structural performance by reducing seismically induced structural damage. In this paper metallic dampers are defined to be structural fuses (SF) when they are designed such that all damage is concentrated on the PED devices, allowing the primary structure to remain elastic. Following a damaging earthquake, only the dampers would need to be replaced, making repair works easier and more expedient. Furthermore, SF introduce self-centering capabilities to the structure in that, once the ductile fuse devices have been removed, the elastic structure would return to its original position. A comprehensive parametric study is conducted leading to the formulation of the SF concept, and allowing to identify the possible combinations of key parameters essential to ensure adequate seismic performance for SF systems. Nonlinear time history analyses are conducted for several combinations of parameters, in order to cover the range of feasible designs. The effects of earthquake duration and strain- hardening on response of short and long period systems are also considered as part of this process.
Passive energy dissipation (PED) devices have been implemented to enhance structural performance by reducing seismically induced structural damage. In this paper metallic dampers are defined to be structural fuses (SF) when they are designed such that all damage is concentrated on the PED devices, allowing the primary structure to remain elastic. Following a damaging earthquake, only the dampers would need to be replaced, making repair works easier and more expedient. Furthermore, SF introduce self-centering capabilities to the structure in that, once the ductile fuse devices have been removed, the elastic structure would return to its original position. A comprehensive parametric study is conducted leading to the formulation of the SF concept, and allowing to identify the possible combinations of key parameters essential to ensure adequate seismic performance for SF systems. Nonlinear time history analyses are conducted for several combinations of parameters, in order to cover the range of feasible designs. The effects of earthquake duration and strain- hardening on response of short and long period systems are also considered as part of this process.
2004-06-26T00:00:00ZInvestigation of the Structural Fuse ConceptVargas, RamiroBruneau, Michelhttps://ridda2.utp.ac.pa/handle/123456789/25452021-07-06T15:34:46Z2005-06-26T00:00:00ZInvestigation of the Structural Fuse Concept
Vargas, Ramiro; Bruneau, Michel
Passive energy dissipation (PED devices have been implemented to enhance structural performance by reducing seismically induced structural damage. In this paper metallic dampers are defined to be structural fuses (SF) when they are designed such that all damage is concentrated on the PED devices, allowing the primary structure to remain elastic. Following a damaging earthquake, only the dampers would need to be replaced, making repair works easier and more expedient. Furthermore, SF introduce self-centering capabilities to the structure in that, once the ductile fuse devices have been removed, the elastic structure would return to its original position. A comprehensive parametric study is conducted leading to the formulation of the SF concept, and allowing to identify the possible combinations of key parameters essential to ensure adequate seismic for SF systems. Nonlinear time history analyses are conducted for several combinations of parameters, in order to cover the range of feasible designs. The structural fuse concept can be implemented in new or existing structures using various kinds of metallic passive energy dissipating (PED) elements. This paper describes how to use metallic dampers to implement the SF concept and improve the structural behavior of systems under seismic loads. Detailed design process is presented, as well as the modifications necessary to the process for retrofitting applications.
Passive energy dissipation (PED devices have been implemented to enhance structural performance by reducing seismically induced structural damage. In this paper metallic dampers are defined to be structural fuses (SF) when they are designed such that all damage is concentrated on the PED devices, allowing the primary structure to remain elastic. Following a damaging earthquake, only the dampers would need to be replaced, making repair works easier and more expedient. Furthermore, SF introduce self-centering capabilities to the structure in that, once the ductile fuse devices have been removed, the elastic structure would return to its original position. A comprehensive parametric study is conducted leading to the formulation of the SF concept, and allowing to identify the possible combinations of key parameters essential to ensure adequate seismic for SF systems. Nonlinear time history analyses are conducted for several combinations of parameters, in order to cover the range of feasible designs. The structural fuse concept can be implemented in new or existing structures using various kinds of metallic passive energy dissipating (PED) elements. This paper describes how to use metallic dampers to implement the SF concept and improve the structural behavior of systems under seismic loads. Detailed design process is presented, as well as the modifications necessary to the process for retrofitting applications.
2005-06-26T00:00:00ZSeismic Design of Multi-story Buildings with Metallic Structural FusesVargas, RamiroBruneau, Michelhttps://ridda2.utp.ac.pa/handle/123456789/25442021-07-06T15:34:46Z2006-06-28T00:00:00ZSeismic Design of Multi-story Buildings with Metallic Structural Fuses
Vargas, Ramiro; Bruneau, Michel
Seismic design relies on inelastic deformations through hysteretic behavior. However, this translates into damage on structural elements, permanent system deformations following an earthquake, and possibly high cost for repairs. An alternative design approach is to concentrate damage on disposable and easy to repair structural elements, while the main structure is designed to remain elastic or with minor inelastic deformations. A systematic procedure is proposed in this paper to design buildings with metallic structural fuses. This design procedure for MDOF structures relies on results of a parametric study, considering the behavior of nonlinear SDOF systems subjected to synthetic ground motions. The proposed procedure has also been illustrated as examples of application using Buckling-restrained braces working as metallic structural fuses
Seismic design relies on inelastic deformations through hysteretic behavior. However, this translates into damage on structural elements, permanent system deformations following an earthquake, and possibly high cost for repairs. An alternative design approach is to concentrate damage on disposable and easy to repair structural elements, while the main structure is designed to remain elastic or with minor inelastic deformations. A systematic procedure is proposed in this paper to design buildings with metallic structural fuses. This design procedure for MDOF structures relies on results of a parametric study, considering the behavior of nonlinear SDOF systems subjected to synthetic ground motions. The proposed procedure has also been illustrated as examples of application using Buckling-restrained braces working as metallic structural fuses
2006-06-28T00:00:00Z