Özet:

The majority of Turkey is located on active earthquakes. So far, many buildings have been damaged and even migrated due to the devastating effects of the earthquake. The earthquakes have led to great loss of lives and goods. The inevitable earthquake fact has revealed the concept of earthquake-resistant design. Structures must have sufficient rigidity and resilience according to the principles of earthquake-resistant building design. The distribution of these two structural properties and the carrier system should be created in a symmetrical and regular way. However, irregular structures are being built for architectural reasons. In these structures, which are irregular in terms of construction geometry and distribution of rigidity, there is a burning irregularity. The unregularity of steering affects the earthquake performance of the structure in a negative way. This is a matter that needs to be thoroughly investigated. In this study, according to the Turkish Earthquake Regulation-2007 and the Turkish Building Earthquake Regulation-2018, the impact of different local ground classes on the unregularity of burning in structures has been investigated. The modeling and earthquake analysis is done in the SAP 2000 program. The Earthquake Load Method and Mode Combination Method used 270 earthquake analyses for 5 different structural types. For structures of 4-6 and 8 floors, structures in different floor classes have been obtained in the scratch irregularity ratings. The results are compared according to both earthquake analysis method and earthquake regulations. In the Turkish Building Earthquake Regulation-2018, regular structures are reduced with the Turkish Earthquake Regulation-2007, while irregular structures have seen a serious increase in the structural structures are reduced. The impact of local ground classes on calculations has become more realistic with the Turkish Building Earthquake Regulation-2018. The local ground class has a significant impact on the burning behavior in the Turkish Building Earthquake Regulation-2018 and the conclusion is that this impact of the local ground class should be taken into account in the design and evaluation of structures with burning irregularities.

Anahtar Kelimeler:

Özet:

A major parts of Turkey is located on the active seismic belts. Until now, many structures have been damaged and even collapsed due to the destructive effects of the earthquake. The earthquakes have caused largely in loss of life and property. The inevitable earthquake fact has revealed the concept of earthquake resistant design. The structures must be had sufficient rigidity and strength according to earthquake resistant structure design principles. Load-bearing system and the distribution of these two structural properties must be formed symmetrically and regularly. However, irregular structures are constructed due to architectural reasons. In these structures which are irregular in terms of structure geometry and distribution of rigidity, is seen torsional irregularity. Torsional irregularity negatively affects the earthquake performance of the structure. Therefore, it becomes a subject that needs to be meticulously investigated. In this study, effect of different local site classes on torsion irregularity in structures have been investigated according to Turkish Seismic Code-2007 and Turkish Building Earthquake Code-2018. Modeling and earthquake analyses have been performed in SAP 2000 program. Earthquake analyses of 270 structures for 5 different structure types have been carried out by using the Equivalent Seismic Load Method and Mode Superposition Method. Torsional irregularity coefficients of the structures on different local site classes have been obtained for 4, 6 and 8-storey structures. The results have been compared according to both earthquake analysis methods and Turkish Seismic Codes. In the Turkish Building Earthquake Code-2018, torsional irregularity coefficients of the regular structures have decreased compared to the Turkish Seismic Code-2007, while there has been seen a substantial increase in torsional irregularity coefficients of the irregular structures. The effect of local site classes on the calculations has become more realistic along with the Turkish Building Earthquake Code-2018. It has been concluded that local site class has a significant effect on torsional behavior in Turkish Building Earthquake Code-2018 and this effect must be taken into consideration in the design and evaluation of the structures with torsional irregularity.