Comparison of Linear Spectral and Nonlinear Dynamic Calculation Method for Tie Frame Building Structure in Case of Earthquakes

Мкртычев, Олег; Bunov, Artem A.; Dorozhinskiy, Vladimir

doi:10.22227/1997-0935.2016.1.57-67

Cited by 2 publications

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“…All the codes oblige to consider a number of pairs of accelerograms (acting simultaneously in both horizontal directions); this number is three in the Chilean, Chinese, and former US codes, six in Japan, three to seven in Italy, and seven in the new US code. e Russian code does not contain any prescription regarding this issue; apparently, seven accelerograms are used in the professional practice [24]. Except in Japan and China, nonlinear behavior is concentrated in the isolator units, while the superstructure and the substructure are assumed to remain elastic; conversely, the Japanese and Chinese regulations allow considering nonlinear behavior of the superstructure.…”

Section: Analysis and Design Proceduresmentioning

confidence: 99%

Survey on Major Worldwide Regulations on Seismic Base Isolation of Buildings

Almansa

Piscal

Carrillo

et al. 2022

Advances in Civil Engineering

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Base isolation solutions are efficient alternatives for seismic protection of buildings and for enhancing resilient capacity. Currently, seismic isolation is focused principally on the critical infrastructure of public health, transportation, education, etc. Despite these considerations, the current worldwide implementation of this technology is still insufficient. A crucial step to be taken into the promotion of any earthquake-resistant construction technique is the development of design codes that, although being inspired in the major international regulations, account for the local seismic effects, among other factors. With the aim of assisting code developers, this work analyzes and compares the code requirements for seismic base isolation in Japan, China, Russia, Italy, USA, and Chile. Two prototype seismically isolated hospital buildings located in high and medium seismicity zones (Los Angeles and New Mexico, respectively) were analyzed and designed with the examined codes. It is concluded that there are high differences among some of their requirements even though the technology used is the same.

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Section: Analysis and Design Proceduresmentioning

confidence: 99%

Survey on Major Worldwide Regulations on Seismic Base Isolation of Buildings

Almansa

Piscal

Carrillo

et al. 2022

Advances in Civil Engineering

View full text Add to dashboard Cite

show abstract

“…Russian code does not contain any prescription; apparently, 7 accelerograms are used in practice (Mkrtychev et al, 2015). Except in Japan and China, nonlinear behavior is concentrated in isolator units; conversely, Japanese and Chinese regulations allow considering nonlinear behavior of superstructure.…”

Section: Nonlinear Time-history Analysismentioning

confidence: 99%

New design considerations for seismic isolated buildings in Colombia

Arévalo¹

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An important percentage of Colombian population is located in medium-to-high seismicity zones (NSR-10, 2010). Therefore, it is important to protect the buildings, principally the highly crowded ones, and those that are considered as indispensables for community attention after an earthquake event. One most successful techniques for structural protection is base (seismic) isolation; despite their obvious advantages, in Latin America (and, more specifically, in Colombia), its use is still only limited, whit a low number of isolated buildings. This situation can be due to several reasons: insufficient awareness of this technology, poor knowledge of the involved professionals (i.e. engineers) in design and construction of isolated structures, and lack of local design codes; this last circumstance, forces employing foreign regulations (ASCE 7 in the Colombian case) that do not account for the local characteristics and frequently lead to relevant cost increases. The objective of this Thesis is to promote base isolation in Colombia and other close countries; with this aim, the following tasks are performed: (i) to study and compare the requirements of different major seismic isolation regulations (Japan, China, Russia, Italy, USA, Chile, México), (ii) inside each code, to contrast the results (in terms of forces and displacements) obtained from approximated analysis methods (lateral equivalent method) and more sophisticated procedures (time-history analysis), (iii) to propose (for Colombia) damping modification factors for design spectra, and (iv) to formulate new considerations for design of isolated structures in Colombia (to be converted into a national design code). La mayoría de la población colombiana se encuentra ubicada en zonas de amenaza sísmica alta e intermedia (NSR-10, 2010) por lo cual es de suma importancia la protección de las edificaciones, con una especial atención en las que albergan un considerable número de personas y aquellas que son consideradas como indispensables para la atención de la comunidad después de un evento sísmico. Dentro de las más recientes y exitosas medidas de protección de estructuras a nivel mundial, se encuentra el denominado aislamiento de base; a pesar de sus notorias ventajas, en Latinoamérica y más específicamente en Colombia, su uso es aún limitado. Lo anterior puede deberse, entre otras, a las siguientes razones: escasa divulgación en la zona de esta técnica y de las ventajas de su uso, falta del conocimiento necesario (por parte de los profesionales de la construcción) para llevar a cabo los procesos requeridos de diseño y construcción, y a la ausencia de una normativa nacional específica; esta última circunstancia es relevante, dado que la normativa internacional que se aplica en su lugar (ASCE 7 en el caso colombiano) no recoge las particulares locales y puede generar sobrecostos importantes. El objetivo final de esta investigación es consolidar el aislamiento sísmico en Colombia y en otros países próximos; para alcanzar este propósito, en esta investigación se llevan a cabo las siguientes actividades: (i) se estudian y comparan los requisitos estipulados en diferentes normativas de aislamiento sísmico desarrolladas a nivel mundial (Japón, China, Rusia, Italia, USA, Chile, México), (ii) en cada uno de estos códigos, se contrastan los resultados de fuerzas y desplazamientos obtenidos mediante métodos aproximados de análisis (Fuerza horizontal equivalente) y los resultados obtenidos mediante métodos más sofisticados (análisis dinámico cronológico), (iii) se proponen, para Colombia, factores modificadores del espectro de diseño en función del amortiguamiento, y (iv) se formulan nuevas consideraciones para el diseño de estructuras aisladas en Colombia (embrión de una normativa propia)

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Comparison of Linear Spectral and Nonlinear Dynamic Calculation Method for Tie Frame Building Structure in Case of Earthquakes

Cited by 2 publications

References 0 publications

Survey on Major Worldwide Regulations on Seismic Base Isolation of Buildings

Survey on Major Worldwide Regulations on Seismic Base Isolation of Buildings

New design considerations for seismic isolated buildings in Colombia

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