Marmara University Basibüyük Training and Research Hospital
Istanbul, a city with more than 20 million inhabitants, expects a devastating major earthquake in the future. The majority of the building stock of the city has been built with the old seismic design practice. The need for emergency hospitals in service after such earthquakes is inevitable.
Marmara University Research and Training Hospital is one of many assessed public buildings for its seismic performance as part of the Istanbul Seismic Risk Mitigation and Emergency Preparedness Project (ISMEP) which is financed by a loan to the Government of Turkey by European Investment Bank, and implemented by the Istanbul Project Coordination Unit.
The hospital is located in the Asian part of the city on the Coast of Marmara Sea. It was built in 1991. The hospital consists of 16 mid and low rise adjacent blocks and an indorr parking lot. The hospital covers 112,440 m² and 750 patient rooms.
Prota performed renovation designs (for updating the hospital standards to current state architectural, electrical and mechanical) as well as seismic structural design with base isolation system including technical specifications and cost estimation within the scope of the project.
Seismic Isolation Design of the Hospital
The hospital is located in the 1st seismic zone according to the Turkish seismic code. The structure was retrofitted in 2002; however the retrofitted structure did not satisfy the requirements of the recent Turkish seismic code.
Prota provided seismic structural designs with base isolation (to comply with the Turkish Earthquake and Building code requirements for earthquake performance safety) in addition to architectural, mechanical and electrical renovation design services. Procurement of base isolators and installation were also delivered by Prota.
The structural model had been created and structural analysis were conducted using Prota’s in-house development software called ProtaStructure formerly known as Probina Orion (v16). All column, beam and shear wall elements were modeled as elastic frame elements while isolators were idealized by elastic link elements. More than 800 earthquake isolators were used to minimize any potential earthquake risks.