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El Mirador Single Family Residence
Caracas, Venezuela Architecture: Arch. Henrique Vera Construction Area: 812 m2 (8740 sf) Sector: Residential Scope: Structural Retrofit Project Project year: 2014 Construction years: 2014- 2015 |
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The existing building corresponds to a three-story single-family residential home built in 1959. The remodeling proposal consists of expanding the useful space of the home by expanding the floors, and replacing the tongue-and-groove wooden roof with a terrace accessible panoramic view, which takes advantage of the incredible views of the city of Caracas. Additionally, the installation of an elevator is planned next to the staircase core and a swimming pool in one of the gardens.
The existing structure was investigated, built of reinforced concrete and consisting of ribbed slabs in one direction supported on a system of main beams on the first two levels. The existing roof is gabled with a wooden tongue and groove which will be demolished to generate a new level made up of a mixed composite slab. The structural configuration was evaluated based on the original documents of the house, site visits and tests that served to validate the resistance indicated in the original construction documents.
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An evaluation of the existing building was carried out, developing a structural model that included the walls made of solid blocks and concrete. The evaluation made it possible to generate a construction sequence for the different modifications included in the architectural remodeling program, including the dismantling of the roof, demolition of slabs and walls.
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A system of mixed metal beams and trusses with collaborative formwork was designed for the new roof, capable of supporting the new use as a terrace.
A seismic evaluation of the project was carried out, including the modifications generated by the remodeling, to verify compliance with current regulations. A new lateral load system was designed consisting of inverted “V” bracing and moment frames in collaboration with the existing structure.
The ductility (ability to deform without deterioration of strength) of the existing concrete columns was improved through steel casing at the nodes.
An auxiliary structure was designed to support a new elevator, and the pool in the garden.
A study based on performance 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 objective of life safety in the event of an earthquake design.
A seismic evaluation of the project was carried out, including the modifications generated by the remodeling, to verify compliance with current regulations. A new lateral load system was designed consisting of inverted “V” bracing and moment frames in collaboration with the existing structure.
The ductility (ability to deform without deterioration of strength) of the existing concrete columns was improved through steel casing at the nodes.
An auxiliary structure was designed to support a new elevator, and the pool in the garden.
A study based on performance 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 objective of life safety in the event of an earthquake design.
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