Abstract
In this paper, the seismic behavior of the existing reinforced concrete tall building is investigated by using the linear and nonlinear dynamic methods. The selected existing reinforced concrete structure was designed according to Turkey Seismic Code-2007. The performance analysis according to the Turkey Building Earthquake Code-2019 is realized in a 41-story reinforced concrete shear wall-framed structure in Istanbul where active fault lines are located. For high-rise building, firstly, spectrum analysis according to mode superposition methods of linear computational methods used within the scope of strength-based design is performed. Turkey Building Earthquake Code-2019 advises a nonlinear deformation-based design approach to determine more accurately the behavior of high-rise building, as in the earthquake regulations of other developed countries. In addition, the nonlinear time history analyses of building were performed. At the end of the study, torsional irregularity is seen on the normal floors and intermediate floor; stiffness irregularity was found on second floors. In addition, it has been observed in some of the oblique columns of the building that load bearing capacities were exceeded due to creep, axial compressive loads and severe damages occurred. According to the Turkey Building Earthquake Code-2019, the high-rise reinforced concrete shear wall building is not expected to satisfy life safety performance levels under design earthquake.
Highlights
Seismic behavior and principles of earthquake. resistant structural design included structural engineering codes of various countries take important part in the code of Turkey
The results demonstrate that the proposed method can estimate the seismic responses of high-rise buildings with a high accuracy and has the advantages of ease of implementation and operation
The aim of the present study is that the implementation of nonlinear dynamic analysis in order to estimate the seismic performance of an irregular in plan tall building
Summary
Seismic behavior and principles of earthquake. resistant structural design included structural engineering codes of various countries take important part in the code of Turkey. Resistant structural design included structural engineering codes of various countries take important part in the code of Turkey. Determination of seismic of existing structures gained great importance. A large number of existing reinforced concrete shear wall unsymmetrical plan tall buildings in first-degree seismic zone need seismic evaluation because of their unfavorable seismic behavior, types of irregularities in plan and in elevation. Performance-based design procedures have been investigated for the irregular recently. Performance-based design and evaluation methods have been developed in order to determine building safety more realistically than previous codes or just reastically and contribute to strengthening structures that are considered to have insufficient safety. Few codes in the world have regulatory requirements towards performance based seismic design of tall buildings.
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