There are not two buildings wherein they are very much alike exactly. As a matter of fact, for some it may only seem at for its initial appearance to become identical but it is displaying different approaches of apartment buildings seismic retrofit and could significantly display differences which are based on various factors. These are involving its structural compositions, materials, and the tear and wear of buildings and as well compositions of soil just beneath it.
It also comes impossible then on giving specifications to retrofit projects without the first and to do such studies in engineering comprehensively which is examining not only as what is built, but also in inspecting the properties itself. With that being said, here you could see some approaches basically to methods of retrofitting applied on varied types of structural buildings. With it, it should be found on being vulnerable on many damages or collapsing in such major earthquakes.
Structures which have soft story features are very common among those kinds which are for apartments. They are characterized through an open parking placed on ground floors and units for dwelling above built. In many instances, the ground floors are to be utilized as retail spaces or enclosed with windows which is not providing structural supports.
These said wood framed types, are constructed already before the decade of seventies, which were extremely considered vulnerable, to collapsing during major earthquakes. Composition of said buildings are lacking such abilities on withstanding lateral forces which pushes a building side to side. This swaying could cause such collapse probabilities to the first floors, and for upper story to pancake the top of it.
The retrofit construction for these buildings are usually entailing such installations of steel moment frames or sets of frames for sturdy foundations in absorbing ground motions and avoidance of swaying. The concrete which is not ductile to buildings were also built during that date. Moreover, they quite are characterized by having concrete roofs or floors supported of the concrete walls, frames, and columns.
Due to rigid constructions, and its limited capacities on absorbing said energies, and stronger shakings of grounds, these facilities are at high risks of collapsing in an earthquake happens. As a fact, non ductile types are making up majorities of losses on earthquakes all over the world. That is due to reason because they are used in offices with large occupants.
These large numbers of people occupying the same floor are huge potentials of death. Injuries and fatalities are more likely and a concern important to take considerations. Guarding against collapses from these events, retrofit is a good benefit to it.
This makes sure on entailing the usage of shear walls and fortifications of columns. That purpose is on providing stronger frameworks on preventing collapses on heavier floors on top. The most cost effective of all is the tilt up method.
As for choosing the company for this project, you have to choose carefully your option. The best option for you is to pick a leading company. That ensures that a project is done successfully.