The existing building corresponds to a two-story single-family residential home built in the 1980s. The remodeling proposal consists of partially removing the inclined roof and replacing it with a horizontal slab that generates natural light through an elongated window in the upper area of the axis through which the ridge passes. Additionally, the expansion of the first level is contemplated with the addition of a new room and the construction of a new water tank.
The first level contains a slab ribbed in one direction and the second level corresponds to a gable roof. The system resistant to lateral loads is made up of moment frames in the longitudinal direction, and does not have beams in the transverse direction. The existing structure was investigated, and the configuration was documented based on the original documents of the house, site visits and tests that served to validate the resistance indicated in the original construction documents.
Among the main activities developed are:
A composite slab with collaborative formwork was designed for the new horizontal roof.
A seismic evaluation of the project was carried out, including the modifications generated by the remodeling, to verify compliance with American regulations at the request of the client (ASCE 7, ASCE 41-13). A new lateral load system was designed consisting of inverted “V” bracing and moment frames in collaboration with the existing structure.
A performance-based study was carried out through a non-linear static analysis (Pushover) considering the new earthquake-resistant system, to verify that the deformation imposed on the elements of the original building did not exceed the life safety (LS) objective. the design earthquake.
The ductility (ability to deform without deterioration of strength) of the existing concrete columns was improved through steel casing at the nodes.
Among the main activities developed are:
A composite slab with collaborative formwork was designed for the new horizontal roof.
A seismic evaluation of the project was carried out, including the modifications generated by the remodeling, to verify compliance with American regulations at the request of the client (ASCE 7, ASCE 41-13). A new lateral load system was designed consisting of inverted “V” bracing and moment frames in collaboration with the existing structure.
A performance-based study was carried out through a non-linear static analysis (Pushover) considering the new earthquake-resistant system, to verify that the deformation imposed on the elements of the original building did not exceed the life safety (LS) objective. the design earthquake.
The ductility (ability to deform without deterioration of strength) of the existing concrete columns was improved through steel casing at the nodes.