چكيده به لاتين
Nowadays, advanced countries considering the necessity to find a solution for global environmental issues, existing energy crises in addition to modern timber structures and engineered wood products(EWP) benefits, aim to apply Engineered wood-related technologies inclusively in various types of structures and infrastructures. Since 1994, modern timber construction has completely been separated from the conventional one. The modern-invented timber construction including Glulam and CLT as approved structural materials, has formed several trusted structural building systems by applying reinforcement methods such as the usage of concrete to build hybrid building systems in either vertical or horizontal support and lateral resistance structural members. In this thesis by the means of case study methodology and field researching 60 timber structure buildings located in continents of Europe, North America, and Oceania with three height levels have been analyzed. Then they are classified into three aspects of building systems (seven categories divided based on vertical and horizontal support system), lateral resistance (categories of various lateral system, shear cores, and podiums), and finally applied materials in all of the mentioned groups. Afterward, the frequency rate of structural elements and materials are calculated. First of all, according to more than half of the case studies’ location on the regions with high seismic hazard, it is concluded that modern timber structures have responsive structural performances in seismic regions. Secondly assessing all 60 case studies, it results that building system type 3 (post- beam -panel )with lateral shear cores are structurally responsive and appropriate for any building with any height levels located in different seismic regions. Lastly, CLT as a shear wall or as a hard diaphragm floor in both vertical and horizontal lateral resistance systems and also concrete in the form of podiums forming ground levels are vastly used in mid-rise and high- rise buildings.
