Any input concerning assignment of hinges to beams, columns and shear walls is highly appreciated. I would like to know what would be a better estimate for relative distances for plastic hinges in case of beams, columns. While assigning plastic hinges, I have an option of using ASCE 41-17 (Seismic Evaluation and Retrofit of Existing buildings". I will be using ETABS 2017 for performing Pushover Analysis. Until now, I have decided to go with "Displacement Co-efficient method". I'll be performing "Non-Linear Static Pushover Analysis" for my model. I am interested in performing "Performance Based Design" for a 20 story building. Now I am thinking to connect it with plinth beam as the pattern in attached pic as I am not getting any Idea, and frankly I don't have idea to calculate the "k" value as per ACI-318.Īlso You mentioned the model is showing "k" calue > 3, But the model I see the "k" Value as "1" only.
Prokon column design code#
When I design as per BS code its passing and ACI code it is failing in Buckling. I took the partially Fixed end conditions. However what I did is I tried to design it in PROKON with the loads as under Would like to know what you did for the please dont be sorry. P.S: When I change the 'k' value to 1 in etabs, the columns passed with 6T16 bars. I suggest you to design those columns in some other program or manually. Etabs is considering the 'k' value for those columns almost near 3. Kindly provide guidance in this regard.Ĭan anyone please reply in this Sorry for getting late but I have checked and studied your model, analysis done by etabs seems reasonable to me but the design is somehow not acceptable. I am designing the Building for "Intermediate Brace".
Prokon column design how to#
My query is shall I play with Effective length ratio "K" factor to pass that column without beam as I cant increase the size of Column as it is already 9"X24" column, and If I opt to change "K" factor how to calculate it as by default in Etabs "K" value fixed in "1". But in practical/ at site, it is impossible to provide the beam. On the other hand when I put a grade beam there it is easily passing. In my Etabs model when I am removing that Grade beam I am getting OS#5 Error ( Column load Exceeds Euler's Buckling Force), mean that Column is failing in Buckling. Ground floor has a Water tank hence, at that particular location I cant provide a Plinth/ Grade beam as it will crosses the tank so, I have to design that column for a height of 2+3.2-(depth of foundation-24" (Say))- (depth of Roof beam(15")) =4.21 meter (Effective). I am struck in a small Issue, I am designing a G+4 building, subjected only to Gravity loads, The typical Floor Height is 3.2 meters and Height below the (up to Bottom Of Foundation) Plinth level is 2 meters.