Research Information System
ÖZGAN K.(Executive), DALOĞLU A., KILIÇER S., İKİZLER S. B.
TUBITAK Project, 2018 - Continues
Increasing national and international terrorist attacks, natural gas and tank explosions in recent years have shown that these unexpected load effects may create significant damages to the structures and may cause partial or total collapse of the structures. Some developed countries such as the United States of America, England and Canada, using the regulations they have prepared by considering such situations, make progressive collapse risk analyses for prestigious structures. However, progressive collapse analysis is not yet used in our country, and critical structures such as public buildings, military buildings and hospitals are being constructed with this lack. In this case, if the structure is subjected to unusual loads, sudden loss of one or more structural members from the structural system may lead partial or total collapse of the structure. The aim of proposed project is to take into account the subsoil effect in progressive collapse analysis and to carry out a study supported by numerical examples with calculation steps that will serve as a guide for design engineers who want to make a progressive collapse analysis. In this way, it is aimed to increase the awareness of progressive collapse analysis in our country.
For this purpose, numerical examples for two reinforced concrete and two steel structures were analysed using the UFC 4-023-03 criteria published by the US Department of Defence, which is widely used in academic studies conducted around the world in the field of progressive collapse analysis. The structures were analysed for two different methods using Alternave Path Method which are Linear Static Analysis and Nonlinear Dynamic Analysis Method. The same numerical examples were also solved by taking the soil-structure interaction into consideration and the effects of subsoil on the results were investigated. The analysis to investigate the subsoil effect using the Modified Vlasov model was performed by using SAP2000 and MATLAB programs simultaneously with the help of an interface coded in MATLAB. As a result of the analysis, it was seen that the nonlinear dynamic analysis procedures produced more realistic and economical results compared to the linear static analysis procedures and the subsoil effect could significantly change the progressive collapse resistance of the structural elements.