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Turkish Greetings. I'm not very familiar with the idea. After trying a few projects, I noticed that the idecadin installation combinations were missing, or I couldn't see it. Where are the internal force combinations in the 2.7.5 principal axis direction of the earthquake code?
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Loading Combinations in Analysis
- Thread starter ingegnere
- Start date
Levent Özpak
Active Member
"ingegnere":2ezr8mk1" said:Greetings. I'm not very familiar with idecade. In trying a few projects, I noticed that idecadin loading combinations are missing, or I couldn't see it. Where are the internal force combinations in the 2.7.5 principal axis direction of the earthquake code?Hello, (Item 2.7.5) Adding 30% of the earthquake force coming from the other direction is taken into account by adding 0.30 of the impact from the other direction to the calculated raw results. (If you look at the difference between the raw results and the design results in the element results, you can see the mentioned increase.) In addition, information about the application of the relevant article is given in the reinforced concrete reports.Carrier Under the joint effect of earthquakes in the x and y directions, which are acted on the system separately, the internal forces in the a and b principal axis directions of the structural system elements will be obtained by Equation (2.12), giving the most unfavorable result (Figure 2.10). Where does it load +Q+EX+0,3EY Thanks
Greetings again. As you said, I looked at the raw and design loads. It only applies clause 2.8.5. In other words, it magnifies the raw forces by multiplying the beta coefficient. What I don't understand is where does the 0.3 Y calculation on the other axis. If you can explain with an example, I would be very grateful. I wish you good work..
The values written in brown on the element results screen are the values with the design results augmented, different from the raw results. In the appendix you can see that in a 50x40 column, 30% of the Y-direction loading is added to the X-direction result and 30% of the X-direction loading is added to the Y-direction results, resulting in amplification in internal forces for the design.
Hello, I ask your forgiveness, since the better we know the İdecad program, the better engineering solution we can make. It only uploads G+Q+EX as a combination in the attachment you sent. Here EX= 0.3 EY. So why does it not take into account the earthquake forces obtained in the X direction? If so, where does it add? So I couldn't understand this. You said that what should be normal was G+Q+X(the earthquake force on the axis)+0.3EY 0.3EY= EX. It was a bit complicated, I hope I could explain my problem.
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Ismail Hakki Besler
Administrator
related regulation article ; 2.7.5. Element Prime Internal Forces in Axis Direction Under the joint effect of earthquakes in x and y directions, which are acted on the structural system separately, the internal forces in the a and b principal axis directions of the carrier system elements will be obtained by Equation (2.12), which will give the most unfavorable result (Fig. 2.10).ideCAD Upload All It also takes into account the 0.30 increase mentioned in the regulation article. In this example, the unincreased, ie not applied, moments are as follows for Ex loading M2i=0 M3i=0.4622 For Ey loading M3i=0.4368 M3i=0 When the substance is applied, the increased moments are as follows for Ex + Ey * 0.30 M2i=0 + 0.4368 x 0.3 = 0.131 M3i= 0.4622 + 0 x 0.3 = 0.4622 Ey + Ex * 0.30 for O loading M2i=0.4368 + 0 x 0.3 = 0.4368 M3i = 0 + 0.4622 x 0.3 = 0.1386 According to this regulation, increased internal forces are used as +- in combinations. The regulation article does not tell us to make combinations. It says increase, and ideCAD also increases the tip forces in accordance with the regulation. When the regulation was first published, this sanction clause was only introduced for carriers whose principal axis was not parallel to the x and y axis. Later publications covered all vertical carriers. Seismic regulations do not (cannot) decide which load combinations to be made. Loading combinations are created according to the material used in ideCAD, whether it is reinforced concrete or steel, and the regulation used ( Ts500 AISC TS 648)."ingegnere":2c10p71p" said:Hi, I ask your forgiveness as the better we know the İdecad program, the better engineering solution we can make. The attachment you sent only loads G+Q+EX in combination. Here EX= 0.3 EY. So why doesn't it take into account the earthquake forces obtained in the X direction. If so, where does it add it? So I couldn't understand this. You said that what should normally be G+Q+X(seismic force on the axis)+0.3EY 0.3EY= EX. It was a bit complicated, I hope I could explain my problem.You do not have permission to view link Log in or register now.
Hello, I think there is no eccentricity in the attached picture. There are EX, EY and EX1, EX2, EY1, EY2 created in the program. As far as I understand, EX1, EX2, EY1, EY2 uploads are considered eccentricity. The article 2.7.5 we mentioned does this by taking into account the additional eccentricity situation. Is it true? What is the EX and EY installation status? Thanks.
Ismail Hakki Besler
Administrator
"ingegnere":3ukget6r" said:Hi, I think there is no eccentricity in the attached image. There are EX, EY and EX1, EX2, EY1, EY2 created in the program. As far as I understand, EX1, EX2, EY1, EY2 uploads take into account the eccentricity situation. The item 2.7.5 we mentioned is taking into account the additional eccentricity. Is it correct? What is the loading status of EX and EY? Thank you. This is the example that consists of only one column, entered to answer the question you asked.The loads applied to the floor mass center in the X and Y directions, respectively, to the floor mass center described in the last part of the Ex and Ey Earthquake Code 2.8.2.1.
saridurmus
New Member
Ismail, thank you for your enlightenment.