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The reinforced concrete structure, on which you can see the plan and 3d view above, consists of 2 openings of 6 m and 10 m in the X direction, while it has 2 4 m openings in the Y direction. Earthquake effects will be determined by solving the structure modeled as reinforced concrete moment transferring frame and full rigid diaphragm with dynamic (modal) analysis in accordance with the dynamic eccentricity method and mode combination method. Comparative model and result review with ETABS is below.
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Project data: Solutions are implemented with ETABS v17 and ideCAD Static v10.2091.
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Another point to note is that if the suitability for beams is marked in ideCAD Static, the 'torsional constant' section, which you can see in the following image in the set modifiers section of ETABS , should be intervened. 10 (-6) should be written.
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As a full rigid diaphragm will be used for flooring, membrane entry should be made with ETABS.
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a- For reinforced concrete column
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b- For reinforced concrete beam
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c- For flooring, ideCAD performs static loading over the clean opening. For this reason, the loads written on the ideCAD Static laying menu should be calculated over the clean area and entered by decreasing the ratio between the two areas, as ETABS calculates the full area. In summary, etabs (clear area / full area) * should be loaded.
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In ideCAD Static, two load case analysis type should be selected. In this type, the additional eccentricity effect is solved by the dynamic method. For the dynamic method, ETABS modeling should be searched from etabs sources with the title 'accidental torsion with dynamic procedure'.
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1- Mass source regulation
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Run ideCAD as static administrator. Analyze the project once. Type exportspectrum to the command line in the lower toolbar . Go to the program files - ideCAD v10 folder located in the c folder on your computer. You will see a txt file named exp_spec.txt, check out this file. ideCAD works with dot for decimals, ETABS is comma or dot whichever is set on your computer, edit the txt file accordingly. Then import the file named exp_spec while ETABS - Functions -User Defined is selected.
Yatay Deprem Etkisi Altında Azaltılmış Tasarım İvme Spektrumu Design Spectrum Reduced by Respose Modification (4.4.1)
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4- Loading Cases
Doğrultu Birleştirmesi Uygulanmış Yatay Deprem Etkisi Load Combinations of Earthquake Effects for Perpendicular Directions (4.4.2.1)
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2- Analysis Results
a) Structure Weight
Floor based
ideCAD StaticStructural
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ETABS
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Total
ideCAD StaticStructural
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ETABS
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b) Vertical Results
1- Displacement
In the ideCAD model, starting from the top floor located between the column C0013 and the beam B016-B017, the joint point values named N2 - N1 - N25 - N48 were read sequentially.
ideCAD StaticStructural
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ETABS
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2- Internal Force Frame Results
ideCAD StaticStructural
C0002 corner column
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ETABS
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c) Modal Analysis
ideCAD StaticStructural
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ETABS
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d) Horizontal Earthquake Load Results
1- Displacement
ideCAD StaticStructural
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ETABS
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2- Internal Force Frame Results
ideCAD StaticStructural
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ETABS
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e) Calculation of Magnification Coefficient According to Equivalent Earthquake Load Method
Eşdeğer Büyütme KatsayısıEşdeğer Deprem Yükü YöntemiAzaltılmış Tasarım İvme Spektrumu
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Equivalent Lateral Force Method 12.8.1.1 Seismic Response Coefficient for Equivalent Lateral Force Method
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The information used in the account in the ideCAD Static Dynamic analysis report is summarized below.
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f) Relative
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Göreli Kat Ötelemelerin Sınırlandırılması
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Göreli Kat Ötelemesi Lamda Değerleri Hesabı Örneği 1
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Story Drifts Calculation
Calculation and Control of Relative Story Displacements.
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The calculation made in the relative storey displacement section of the ideCAD Static Earthquake Structural Seismic regulation report is below.
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g) Second Order Effect Calculation
İkinci Mertebe Etkileri 12.8.7 P-Delta Effects section contains the philosophy of the account and how it is done. This account cannot be obtained directly from ETABS. The required data is taken from ETABS and the calculation is made manually.
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Calculation results are given in the second order effects section of the ideCAD Static Earthquake regulation report.
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