Developing an Incremental Dynamic Analysis using SAP2000 & ETABS
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- เผยแพร่เมื่อ 10 ก.ค. 2024
- In this video you will learn how to utilized the incremental dynamic analysis (IDA) using time history analysis of a 2D RC frame structure.
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Great video. Thanks for the explanation.
sir, kindly guide, if we are using a reduced scaled model on shake tables testing i.e. 1/3rd scale, for modelling it in etabs or sap2000, how we will we model the geometry and properties and how to scale the ground motions in software
Dear Sir,
Thank you for nice video on Incremental Dynamic Analysis. I have one doubt related to Ground motion data used for IDA. Do we have to use the free field data downloaded from PEER Database or we have to use record matched as per our codal spectra ?
Hye sir, if the Gm is in y-directioon we need to choose U2 is it?
that was great
1) In the definition of load cases, How many load patterns do I have to define? and which patterns please mentioned the names of load patterns.
2) In load cases, Please clarify the need for a "modal load case".
3) There is any need to provide a load combination?
Sir my IDA curve appears to be linear. Do you have any suggestions for this ??
Its okay to be linear, most of the 3D modeling will shows linearity in their curves... Please refer to my research work and you will notice that.
Pleas help me ... i have problem in scale factor unit!
I think you should inter 0.1×9.81
But you intered 0.1×9810
Why?!?! And how can i find that?!?
hello sir, we should ground database matching for code based response spectrum or not for IDA analysis????
Yes matching the the ground motion w.r.t targeted response spectrum is a MUST!!! To achieve your IDA ...
Hello Sir, can you please explain about fragility curves and how is was developed in all types of building.
I am also interested in the topic
I will prepare video for this in details.
@@EarthquakeAssessmentbyDrMousta Sir, Still waiting for the video.
Hello dears. I need to develop fragility curves from IDA. Is there anyone who can guide please
Hi guys.. define fragility curve is easy once you have the ida curve. Simply collect all ground motion values (i.e. rsa[t1]) that caused building at considered condition (i.e. collapse). All convert to log natural values. Find the median and standard deviation values from these all ln. Then create series of ground motion from 0 to 4 g, with step of 0.1, then convert to ln. Calculate the normal distribution (in excel is normdist) of these series, median and standard deviation. You will get the probability. Plot it with ground motion series of 0 - 4 g, then you will get fragility curve. Further about fragility curve, you can read paper made by dr keith r poter. It has example with various data vondition. It is entitled Practical Development & Application of Fragility Function, published in 2007 by ASCE.
Can you please explain how to develop fragility curves from the results obtained from IDA?
I will prepare video for this in details.
Hi guys.. define fragility curve is easy once you have the ida curve. Simply collect all ground motion values (i.e. rsa[t1]) that caused building at considered condition (i.e. collapse). All convert to log natural values. Find the median and standard deviation values from these all ln. Then create series of ground motion from 0 to 4 g, with step of 0.1, then convert to ln. Calculate the normal distribution (in excel is normdist) of these series, median and standard deviation. You will get the probability. Plot it with ground motion series of 0 - 4 g, then you will get fragility curve. Further about fragility curve, you can read paper made by dr keith r poter. It has example with various data vondition. It is entitled Practical Development & Application of Fragility Function, published in 2007 by ASCE.
Why scale factor is taken in mm/s2 instead of taking m/s2
cause of the file, file recording can be differnnt compared to units in SAP
@@omairshafiq1998 hi how can i find the unit of ground motion file?!?!
What is major difference between non linear dynamic analysis and IDA ?
Nonlinear dynamic analysis type is time history analysis which provides to develop the IDA curve, by incrementally increasing the intensity measure with respect to damage measure. In general speaking, the IDA can be generated from NLTHA approach.
For further clarifications,
Please contact me on moustafa.mk@usm.my.
@@EarthquakeAssessmentbyDrMousta sir there is some difficulty to contact with you. i can't connect you please provide any another approch to connect with you
@@EarthquakeAssessmentbyDrMousta sir can you give any suggestions regarding research work in earthquake engineering topic which is popular now a days for masters of engineering purpose ?
@@rahulkaklotar6510 sir you can contact me on my email moustafa.mk@usm.my, so i can help you to suggest an earthquake engineering tasks.
Why you doing matching just by multiplying to the target PGA. For example, in your video you want PGA 0.1 g, you just multiply it by 0.1 g, instead of ground motion there is already PGA, for example, for example the PGA is 0.3 g, if you multiply it by 0.1 then the PGA = 0.1 x 0.3 = 0.003 g