Investigation of performances under earthquake load of of multi storey timber buildings

Timber structures based on very old dates in our country and the world have been less preferred than those constructed as reinforced concrete and steel systems. The main reasons for this are; that wood is an orthotropic material, wooden structural elements can not be found and produced in desired sections and lengths, it is thought that there is no resistance against fire, and design against fire is unknown. These reasons have been eliminated from time to time with the development of technology (with the development of CLT panels and glulam building elements). With today's technology, columns, beams, shear walls, etc. in desired sizes and shapes in factories wooden building element can be formed. Therefore, the range of designs for engineers and architects is steadily increasing. There are many wooden made high buildings, bridges and stadium structures in the world that have been designed and built using these wooden building elements. As for the design of multi-storey timber structure, dynamic analyzes have been made considering the wind load in the studies done abroad and the designs have been directed towards this. In this study, because of the fact that our country is an located on active faults, the performance of a multi-story wooden structure under earthquake load has been investigated. In this study, the performance of four different wood structures of twenty one floors designed with Glulam column-beam elements, CLT panels, shear wall and floor systems and Glulam cross elements were performed by dynamic analyses. In the dynamic analyzes, a saceled record derived from the 1999 Kocaeli earthquake record was used. The results obtained were evaluated and it was investigated which type of structure exhibited more appropriate performance under the selected earthquake recording. It has been seen that wooden structure with shear wall-central core system exhibits better dynamic performance than other systems. Moreover, other structural carrier systems have also reached the conclusion that they can be used in our earthquake-stricken country. For this reason, the scope of the new earthquake regulation which will enter into force on further January 01, 2019 may be extended to cover seismic design rules of multi-storey wooden buildings in the following years. It has been recommended that the number of experimental and numerical studies be carried out on the wooden structural systems and the level of wooden structural knowledge in our country should be increased.