Calculation of some dynamic parameters of school buildings before and after reinforcement with environmental vibration records

The behavior of structures under the influence of dynamic loads (earthquake, wind, traffic load, etc.) and the dynamic properties of the structure are determined by Structural Health Monitoring (SHM) systems. Dynamic properties of the structure such as natural frequency, mode shape and damping ratio can be obtained by using theoretical and experimental methods. In order to prevent the structures from being damaged under the influence of these dynamic loads, various precautions must be taken Taking appropriate measures depends on a good knowledge of the dynamic behavior of existing structures. In this thesis, two school buildings in Dörtyol and Iskenderun districts of Hatay province, which were decided to be retrofitted, are discussed with the SHM method. As strengthening work for Dörtyol Anatolian High School, 7 (short direction 3 long direction 4) shear walls with concrete compressive strength of 30 MPa and strengthening yield strength of 420 MPa are added along the height of the building as a strengthening work. For the Iskenderun Chamber of Commerce and Industry Primary School, 3 shear walls in the short direction and 1 in the long direction were added as strengthening work. Concrete compressive strength was determined as 30 MPa and yield strength of strengthening was determined as 420 MPa. Both pre- and post- strengthening vibration tests are conducted for both school buildings. As a result of the experiments, the dynamic parameters of the buildings are determined and it is aimed to compare them. In order to determine the current situation before retrofitting, the vibration records of the buildings under the influence of ambient vibration are determined and transferred to the computer environment. The same experiments are carried out for post-reinforcement. The period values of the buildings are compared through the values obtained as a result of the analyzes made. Then, the change of dynamic parameters of the buildings after retrofitting is examined. In addition, a model of the buildings is created using the building analysis program in order to compare the experimental research. Both theoretical and experimental values are compared.