Modeling of the reinforced concrete part of the steel structure

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puncover

New Member
Hello there. I will build the reinforced concrete part of a project modeled as a steel roof and column. Support values have been sent. How do I define the Ex - Ey and Snow-Wind loads to the columns, what combinations should be created, can you help me :( ?
 
Hello, If you want to use the earthquake forces calculated by you instead of the earthquake forces calculated by the program; At first, parameters that will minimize the value of the spectrum must be entered in order to inactivate the automatic earthquake spectrum in the program. Then, in order to give the earthquake loads as external loads in the program, you need to define the earthquake loads one by one. Below is an example of how to define soil loading states and load combinations. Likewise, earthquake and wind loading conditions and necessary combinations should be introduced. 1- Definition of Loading Status After creating your static model, you should specify the soil load status to the program. For this, first analyze once. The program will define for you the loading conditions and combinations of vertical and seismic loadings. Then define the loading condition for the ground load. -> From the Ribbon menu -> Analysis and Design -> Loading -> Linear Static Analysis Status 2- Define Soil Load Combinations -> From the Ribbon menu -> Analysis and Design -> Combination -> Add New Combination from the drop-down menu. -> The Combination Settings dialog will appear. -> In this dialog, add three lines by saying Add New Line. -> Select the load cases as G', Q' and H from the drop-down list by clicking on the loading boxes of the rows one after the other. -> Double-click on the factor boxes of the rows with the left mouse button and enter the values 1.4, 1.6 and 1.6 respectively with the help of the keyboard. -> Check the Use in reinforced concrete design box at the bottom of the dialog to ensure that the cross-sectional effects of this combination are taken into account in the reinforcement calculations. When you press the OK button, you will have defined the 1.4G+1.6Q+1.6H load combination. Follow the same steps above and define the combination 0.9G+1.6H. 3-In the building tree->Loading Combinations->Reinforced Concrete Design Combinations->Double-click on the Reinforced Concrete Design Envelope->In the window that opens->Add New Line->Select the combination you created before from the opened line->Click OK. According to the above situation, wind and earthquake loading conditions can be defined and external loading can be applied to the columns as described below. You can determine the horizontal force and the moment you want to affect, by right-clicking on the column and selecting the add load option, according to the lines I have given below. Type: Check the defined load momentse moment, force if force option. Coordinate system: Specify whether the entered load values are relative to the element local axes or to the global axes. Direction: Provide information in which direction the load is valid. It shows the direction of the load relative to the 1, 2, 3 local coordinate axes, according to the X, Y, Z global coordinate system. G indicates that this load is a constant (vertical) load.
 
Thank you very much for your reply. However, I did not understand how to enter earthquake loads. Ex - Ey or Ez does not appear as "Loading Status" in the "Loading Status" section. Also, I need to enter all of the afad values to 0 so that I can inactivate the spectrum, do I understand correctly?
 
You can find the necessary combinations in the TS-500 and earthquake regulations. My system in Idecad is as follows;
 
You're welcome, I forgot to add Q1 in wind and temperature combinations, they need to be added too
 
This system is not bad in terms of giving an idea. Negative ground stresses occur in wind loads, but it is necessary to pay attention to this when using it. Earthquake combinations written by us are not taken into account in terms of earthquake regulation controls. Or the expression of the shear force calculated from the earthquake is included. As I said, it is correct in terms of making static calculations, but special controls for earthquake combinations or internal forces caused by earthquake loads are not automatically made by the program because the program's earthquake combination is standard. Therefore, I think it would be useful to enter the sum of the horizontal loads with the combination of Q - Only 30 percent of the mass is included in the calculation of repeated earthquakes - but even that will not be enough. Of course, it is not so important for the small 50 60 cm high pedestal columns. I would like to write the earthquake regulation article, but the forum does not accept it.
 
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