The Key Concepts of Designing Structures to Resist Earthquakes

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Designing Structures to Resist Earthquakes is one of the most complex tasks you can undertake as a structural engineer. That require to you carefully consider several concepts and components to ensure your structure is earthquake resistant. I will be going through the key concepts every structural engineer needs to consider when undertaking a structural earthquake assessment of a building.
So it is important when designing structures to resist an earthquake you know the critical design areas and analysis methods you can undertake.
This video provides you with the key concepts of how to design a building to Resist an earthquake and the different earthquake analysis methods to ensure that your structures are able to resist the design load caused by an earthquake.
Earthquake analysis method range in complexity starting with
- ESA Equlianvate Static Analysis
- MRSA Modal Response Spectrum Analysis
- PA Pushover Analysis
- THA Time-History Analysis
The more complex the analysis method used to assess the earthquake forces the more accurate the assessment will be, Complex methods are also prone to modelling errors so it is always important to use a less complex earthquake analysis method to ensure your design actions are correct.
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💡💡💡
My name is Brendan and I am a structural engineer with over 15 years of experience based in Australia. I have a wide variety of projects from very small to some of the biggest in the southern hemisphere. I have a passion for good structural design and teaching/mentoring.
This channel is to share my passion for engineering and provide entertaining short clips on:
- tips for young engineers on progressing their careers
- anyone needing a refresher on any design element
- design approaches
- Review past engineering failures to improve structural knowledge
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Опубликовано:

2 июл 2024

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Комментарии : 60

@alanemarson 3 года назад

Thanks! It's nearly midnight here in the UK so I'm off to bed. I look forward to watching in the morning as I am increasingly having to consider seismic loading in our wind turbine designs :)

@BrendanHasty 3 года назад

Hi ScottishAI, hope it is interesting and informative. Wind turbine design is an interesting topic I should do a video on that, if you can link me to any good resources it would be appreciated.

@ab7011 2 года назад

Hi scottishAI, Wondering in which firm you are working with, I am in Whitby Wood, India division.

@allanjonathan1349 2 года назад

Thanks for all the great videos Brendan! I really appreciate what you're doing and the time and effort you put in to produce these. I'm a relatively young Structural Engineer living and working in Papua New Guinea, this is my 2nd full year of practice, and your videos really bring a lot of clarity as I'm always keen to improve my understanding. Keep up the brilliant work!

@BrendanHasty 2 года назад

Hi Allan, thanks for the support. Glad that my efforts are paying off. Trying to make videos that are also interesting as hopefully you will learn more.

@joedonzi9552 3 года назад

Millenium Tower , San Francisco - "new smart building designed to fall down in anticipation of earthquake" Prayers to the friends and families of Champlain Tower , Miami Beach .

@DHL4Jesus 2 года назад

Good summary video. I appreciate your dedication and passion for the field. I, too, love what I do as a SE in Hawaii. Keep up the great work!

@BrendanHasty 2 года назад

Hi Daniel, Thanks for the support

@albertfoo1569 3 года назад

Thanks Brendan, was really a good summary. Think a critical aspect for EQ design would be locating the lateral stability systems to avoid torsional vibration mode, which can be disasterous

@BrendanHasty 3 года назад

Hi Albert, Welcome back, thanks for watching. agree Torsion is can be disastrous, makes for every inefficient buildings. when looking at your vibrational modes your want to make sure your first torsional is your third natural frequency.

@timothypolo7062 3 года назад

Another great video! Keep up the good work.

@BrendanHasty 3 года назад

Thanks Timothy, Glad you enjoyed the video

@DeepakKrishna11 3 года назад

That was really informative Brendan, keep up the good work.

@BrendanHasty 3 года назад

Hi Deepak, thanks watching, hope to impress into the future.

@istiadahardh1720 Год назад

Thanks for sharing your knowledge, passing down your experience to the young engineers in this easily understandable and high quality illustrations is not somthing easy to do, and this proofs that you are a ginuine gentle soul. Please, Brenden keep produce such high-quality content and do not get discaredged by the low veiws count, engineering comunity is quite small, but i can 100% positive that your viedos are classics, and will get more and more views as new generation of engineer keep coming. Thanks Brenden and may God have mercy on you.

@BrendanHasty Год назад

Thank you so much for taking the time to watch my videos and encouragement! I will keep up the contents, do let me know if you have any topic suggestions you might have. Again appreciate your support mate!

@istiadahardh1720 Год назад

@@BrendanHasty Concrete detailing Brenden, focusing on connections, this topic is vague and needs belaboring. Because, it is often overlooked by engineering colleges idon't know why, its really critical and as important as analysis and design of RC structures.

@aubreymbewe212 2 года назад

Never stop. This is my favorite subject.

@BrendanHasty 2 года назад

Hi Aubery, thanks for watching and your support.

@structuralanalysis6885 3 года назад

The first clip was from Kathmandu, Nepal. We definitely need to consider all the ductility parameters while designing the future structures. Love from Nepal. Great video. ❤️

@BrendanHasty 3 года назад

Thanks for your support. You get some big earthquakes in Nepal, they would really test your structural designs

@charlykrezz8149 3 года назад

Love your videos. I'm trying to be a structural engineer myself and this chanel is awesome !! 😊

@BrendanHasty 3 года назад

Hi Chalaka thanks for your support and enjoying. I enjoy structural engineering hope you enjoy too. Any topics that I can cover let me know

@rabibrahman5990 3 года назад

Hi Brendan, I just found your channel. I am a passionate structural engineer in Sydney. I really appreciate the fact you are also in Australia, easier for me to relate to your vids. Love your short summaries of the topics. I was wondering if you can do a video on curtain wall facade design (specially designing for construction tolerance and expansion tolerance) and a video on any other tolerances you guys consider in structural detailing for buildings.

@BrendanHasty 3 года назад

Hi Rabib, thanks for the suggestions and glad you are enjoying the content. It is something I can look into. Sounds like a topic that would be good with some real world examples.

@mlafonta 2 года назад

Hi Brendan, congratulations on your channel. In my opinion, lateral stiffness is as important as ductility. Stiff structural stiffness such as RC shear wall will lower the lateral displacement demand which is finally what best relates to flexural damage. Ductility is our life insurance, we must have one but hopefully not use it. Regards from Chile, the land of earthquakes.

@BrendanHasty 2 года назад

Understand lateral stiffness is extremely important. It is all part of structural behaviour.

@Cesar-ek6yw 3 года назад

Tip: dont design until the limit , I mean the relation between demand and capacity , doesn't not be necessary 1 or 0.9 there is s while world that you don't know and softwares doesn't take into account most of it nor the real exact loads that you are going to have, you only have a good approximate ( like the real deformations that you have in steel connections that with etabs or sap 2000 are not possible to measure )

@BrendanHasty 3 года назад

agree you need to know where to hold back some reserve. your design loads are only as good as your assumptions and modelling, which is never exact better to have some up your sleeve

@uBenkiff 2 года назад

Excellent video!

@BrendanHasty 2 года назад

Thanks Uddi

@uBenkiff 2 года назад

@@BrendanHasty I am a graduate Civil Engineer with a love for structures. You are doing an amazing job giving all this knowledge freely to folks like myself. Blessings!!

@Structure-Dubai 3 года назад

Brendan please make a dedicated video on wind load.

@BrendanHasty 3 года назад

Hi I will make a video around this. Thanks for the suggestions

@Viscous_Dampers_For_Houses 2 года назад

Thanks :)

@BrendanHasty 2 года назад

Hi Quake Proof. thanks for the support.

@worldworkshop7998 2 года назад

thanks

@BrendanHasty 2 года назад

Thanks for watching.

@michaelsabbagh2673 2 года назад

Thanks brandon for these videos. Is it possible to do a video regarding design of concrete structures using australian and american codes?

@BrendanHasty 2 года назад

Hi Michael I am going to do a video comparing different codes from around the world, which may help.

@BrendanHasty 2 года назад

it will focus more on the load amplification factors and the material safety factors.

@SamJ-kw1xk 3 года назад

Great video. What book do you recommend for earthquake design?

@BrendanHasty 3 года назад

Hi Sam J, if you are based in Australia, Steel reinforced institute of Australia has a good guide on reinforced concrete detailing and it is free, www.sria.com.au/pdfs/SRIA_Guide_to_Seismic_Design_online%20.pdf . let me know if you want a more complex recommendation. Also, good Journal article on earthquake design and detailing www.engineersaustralia.org.au/sites/default/files/awards/RC%20walls%20in%20Australia%20seismic%20design%20and%20detailing%20to%20AS%201170%204%20and%20AS%203600.pdf

@scootertheeb6172 3 года назад

Good video, way to go! Were you inspired by my last comment on lack of seismic design in NCC and AS?

@BrendanHasty 3 года назад

Hi Xero, Kinda I already had similar issues with seismic design and AS the epsoide was already in planning. I often make videos around what people have surgested tho. Any topics you would want me to cover let me know.

@scootertheeb6172 3 года назад

@@BrendanHasty I am also a structural engineer specialised in seismic design and forensic investigation.

@algreen740 2 года назад

Hi Brendan, Just a heads up, I'd recommend response history analysis rather than time history analysis.

@BrendanHasty 2 года назад

Hi Al Green, thanks for the comments and feedback. Do you mean response spectrum? Time history is typically more efficient but takes longer to design.

@algreen740 2 года назад

@@BrendanHasty Hi Brendan, Thank you for your amazing videos. The phrase "time history analysis" refers to ground motions that occur over a period of time or history, which are identical.

@ahmedmashaly4946 2 года назад

What is the best solution when the center of mass doesn't coincide with the center of rigidity? It's not possible all the times to choose a statically system that is symmetric.

@BrendanHasty 2 года назад

Hi Ahmed, if you can't change the stability system to align with COM, then you will just need to design for the miss alignment. This will mean that there will be torsion in stability system, not great but most stability systems have them. Typically this will increase your stresses in your header beams.

@ahmedmashaly4946 2 года назад

@@BrendanHasty Thank you for you reply. I'm aware of the torsion that will be generated out of this misalignment. In ETABS for example we have the choice to adjust torsion modifiers for any structural element we want. In a structural where shear walls and a core around the elevator shaft are the main system to resist the lateral force is it correct to assume that columns won't have any torsion resistance and therefore change their modifers. Sorry for this long question but there is a very big misconception about this topic here in Egypt and I wanted to know your opinion. Thanks again

@BrendanHasty 2 года назад

@@ahmedmashaly4946 Hi Ahmed, Columns will some load but as they are not very stiff the load will be low. as an upper lower bound assessment it is ok to assume the column have reduced modifiers, but you will need at some point make an assessment of the columns, but likely to govern the design. If it is a big mega column it can in some situations.

@ahmedmashaly4946 2 года назад

@@BrendanHasty I appreicate your help. Thank you so much!

@TWA88T 3 года назад

Tuned mass dampers

@BrendanHasty 3 года назад

will only work on flexible structures. and can be expensive.

@hamzahalsabahie1552 Год назад

smart eng

@BrendanHasty Год назад

Thanks

@nikolasc4142 2 года назад

Great Video but really struggling to understand what you say due to your accent and talk speed . Anyhow concratulations

@BrendanHasty 2 года назад

Hi Nikolas, thanks for the support and comment on improvement. if you end up watching on of my newer videos, last couple of weeks let me know if i still need more improvement.