Abstract
Turkey has always been exposed to active fault lines passing through and unpredictable seismic activities. These ground movements have always been one of the important issues in our country, which have led to great destruction and loss of lives and property in its past. For this reason, our earthquake regulations, which aim to design more accurately against earthquake movements, are continuously made improvements. In this study, the analysis of structures built with tunnel formwork system which is popular today with the new earthquake regulations entered into force in 2018, and the strength and cost according to the old earthquake regulation in terms of what differences will occur. In addition to the study, we investigated how the number of floors and regular floor plans affects the results. For this purpose, two types of structures were covered with 5, 10, and 15 storey models created, first in the 2007 earthquake regulation; then, in the 2018 earthquake regulation, design analysis was carried out. As a result, the new earthquake regulation, which came into force in 2018, led to more realistic results as it provides more accurate environmental inputs used in design analysis. Earthquake loads affecting floors increased by 3.9% for 5 storey in regular structures, decreasing by 38.4% for 10 stories and 43.3% for 15 stories. More irregular structures increased 7.3% for 5 storey, 10-storey structures decreased by 38.9%, and 15-storey structures decreased by 43.6%. In terms of cost, there was a 0.07% increase in total cost in 5-storey buildings, 2.45% in 10-storey buildings, and a 3.91% reduction in 15-storey buildings. In addition to these results, an empirical formula that estimates m2 prices depending on the number of floors was obtained.
Highlights
Tunnel formwork systems are a type of formwork system to harden the concrete material in desired shapes similar to other formwork systems. is system can be expressed as a cast construction system where flooring and walls are cast as large formwork elements at one time
Statistical analysis of 2 different building types with 5, 10, and 15-storey with 2 different architectural floor plans was applied with commercial software both for the 2007 Earthquake Regulation and 2018 Earthquake Regulation [7]. e effects of tunnel formwork system buildings with different structures were comparatively revealed for 2007 earthquake regulations [8] and new 2018 earthquake regulations [9] in plan type strength. e second section investigates the effects of several floors and floor plans in terms of cost for buildings constructed with these systems
There was a 4.8% increase for 5-storey structures, a 5,2% increase for 10-storey structures, and a 2.1% increase in 15-storey structures. erefore, in the analyses made according to TBDY2018, there was an increase in the natural vibration period values of the structure in both building types compared to TDY-2007. is period increase occurs because effective section stiffness has to be taken into account according to the calculation principles in the new regulation
Summary
Tunnel formwork systems are a type of formwork system to harden the concrete material in desired shapes similar to other formwork systems. is system can be expressed as a cast construction system where flooring and walls are cast as large formwork elements at one time. Iterative use of a tunnel formwork system in a project and building heights being extremely important factors in terms of cost are highlighted in numerous studies. Within this framework, the effects of several floors and concrete classes in multistorey building construction with tunnel formwork in Turkey were investigated in previous studies [2]. Another study on the effect of shear wall reinforced concrete elements that have a similar principle to tunnel formwork systems on the strength investigated the performances and capacities of shear walls of 2 different structures with the same architectural design but a different number of floors 2-storey 5-storey structures. Statistical analysis of 2 different building types with 5, 10, and 15-storey with 2 different architectural floor plans was applied with commercial software both for the 2007 Earthquake Regulation and 2018 Earthquake Regulation [7]. e effects of tunnel formwork system buildings with different structures were comparatively revealed for 2007 earthquake regulations [8] and new 2018 earthquake regulations [9] in plan type strength. e second section investigates the effects of several floors and floor plans in terms of cost for buildings constructed with these systems
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
