| Journal: | Ingeniería sísmica (México, D.F.) |
| Database: | PERIÓDICA |
| System number: | 000405586 |
| ISSN: | 0185-092X |
| Authors: | Hernández García, Daniel Alberto1 Tena Colunga, Arturo2 |
| Institutions: | 1Universidad Autónoma Metropolitana, Posgrado de Ingeniería Estructural, Azcapotzalco, Ciudad de México. México 2Universidad Autónoma Metropolitana, Departamento de Materiales, Azcapotzalco, Ciudad de México. México |
| Year: | 2016 |
| Season: | Jul-Dic |
| Number: | 95 |
| Pages: | 53-80 |
| Country: | México |
| Language: | Español |
| Document type: | Artículo |
| Approach: | Aplicado, descriptivo |
| Spanish abstract | Se presenta un estudio paramétrico en modelos simplificados de dos grados de libertad (2gdl) que representan estructuras con disposición a desarrollar pisos suaves o débiles, donde se han variado las relaciones de rigideces y resistencia lateral entre ambos niveles de los modelos. Se condujeron análisis dinámicos no lineales paso a paso, utilizando 10 registros de aceleración sintéticos correspondientes a la zona III-a del lago de la ciudad de México y asociados al espectro de diseño del Apéndice A de las Normas Técnicas Complementarias para Diseño por Sismo del Reglamento para las Construcciones del Distrito Federal vigente. Con base en el estudio de los resultados obtenidos, en particular curvas de ductilidades y distorsiones máximas resultantes de estos análisis, se puede concluir que el mecanismo de piso suave o débil se previene o amplifica con una combinación adecuada de las propiedades mecánicas (rigidez y resistencia) de la estructura muy cercana a lo que actualmente proponen los reglamentos de diseño sísmico de México |
| English abstract | A parametric study where two-degree of freedom (2DOF) simplified models are used to represent structures likely to develop soft or weak stories is presented. Different stiffness and strength balances were considered to define a realistic range of structures with the potential to develop soft story mechanisms according to recommendations of current seismic building codes. Therefore, 338 models were studied for all the considered stiffness and strength combinations which represent typical buildings structures with soft or weak stories currently built in the lakebed zone of Mexico City. Step by step nonlinear dynamic analyses were conducted using 10 artificial acceleration records generated to be compatible with the design spectrum for zone III-a of 2004 Mexico´s Federal District Code, corresponding to soft soil conditions in Mexico City. Peak ductility demands and story drifts were obtained, which were compared with some reference value currently proposed in building codes. The results obtained from this parametric study mostly confirm that a soft story mechanism is triggered or prevented with a right combination of strength and stiffness balances for the structural system, which are close to what it is currently proposed in Mexican seismic building codes |
| Disciplines: | Ingeniería |
| Keyword: | Ingeniería civil, Entrepisos suaves, Balance de rigidez, Ductilidad, Registros de aceleración, Suelos blandos |
| Keyword: | Engineering, Civil engineering, Soft stories, Stiffness balance, Ductility, Acceleration records, Soft soils |
| Full text: | Texto completo (Ver HTML) |
