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The Hidden Engineering of Liquid Dampers in Skyscrapers

https://practical.engineering/blog/2025/7/1/the-hidden-engineering-of-liquid-dampers-in-skyscrapers

37•chmaynard•5h ago

Comments

chiph•2h ago

I don't recall him mentioning how the viscosity of the fluid changes it's effectiveness, but I imagine it would. For reduced maintenance costs (prevent algae growth) they probably use mineral oil, not blue water.

kllrnohj•2h ago

Surely some biocide or glycol or whatever is going to be a lot cheaper than using mineral oil? This is solidly north of a hundred thousand gallons after all, right? Especially since they're already going to have plumbed water in the building anyway, so they wouldn't need to transport drums and drums of whatever liquid is chosen if it's not water?

giantg2•1h ago

Fill it with electro-ferric shock fluid

ggm•2h ago

The non liquid active tuned damper in Tapei 101 is a delight. Sprayed gold like a funky futurist nugget, set amongst massive hydraulic actuators.

I'm not sure you could make a liquid tuned damper be a tourist attraction.

mook•14m ago

I wonder if it would be possible to use it as an indoor swimming pool instead? People should get out when it starts damping least they get tossed around quite a bit, of course…

Havoc•1h ago

Cool video. I love the practical attempts at demos. Even if they don’t always work 100% it’s so much better than talking plus some semi relevant animations

nosrepa•34m ago

Grady loves his models.

rkagerer•7m ago

Toward the end, he suggests water dampers serve a dual purpose to meet fire codes (having a reservoir of water atop your building).

Does this create additional risk when firefighting operations draw it down?

i.e. Do the dampers contribute meaningfully to short term structural integrity of the building (particularly in gusty weather), or are they mainly just for comfort and materials longevity?

Has any building architected its liquid pool damper as a bonafide swimming pool?

Castlevania: Symphony of the Night Decompilation Project

https://sotn.xee.dev/

1•retro_guy•2m ago•1 comments

Young Americans Are Spending a Whole Lot Less on Video Games This Year

https://www.gamespot.com/articles/young-americans-are-spending-a-whole-lot-less-on-video-games-this-year/1100-6532877/

2•andsoitis•5m ago•0 comments

Benchmark for Evaluating Text Embeddings

https://huggingface.co/spaces/embedding-benchmark/RTEB

1•fzliu•7m ago•0 comments

Celebrating love in all its forms across identities and relationships

https://childrensbookforall.org/readings/16

1•chbkall•11m ago•1 comments

Qantas customers involved in mammoth data breach

https://www.news.com.au/travel/travel-updates/incidents/qantas-customers-involved-in-mammoth-data-breach

1•aussieguy1234•12m ago•1 comments

New claim added: X opens up to Community Notes written by AI bots

https://www.theverge.com/news/696210/x-community-notes-ai-note-writers

2•bundie•12m ago•0 comments

HTTP: H Is for Hallucinated

https://www.jasonthorsness.com/28

1•jasonthorsness•14m ago•0 comments

The simple act of reading can be a crime in Malaysia. Here's why

https://www.rnz.co.nz/life/books/the-simple-act-of-reading-can-be-a-crime-in-malaysia-here-s-why

3•billybuckwheat•14m ago•0 comments

Powell confirms that the Fed would have cut by now were it not for tariffs

https://www.cnbc.com/2025/07/01/powell-confirms-that-the-fed-would-have-cut-by-now-were-it-not-for-tariffs.html

2•fedest•23m ago•0 comments

Hilbert's sixth problem: derivation of fluid equations via Boltzmann's theory

https://arxiv.org/abs/2503.01800

1•nsoonhui•37m ago•0 comments

Wider or Deeper? Scaling LLM Inference-Time Compute with Adaptive Tree Search

https://arxiv.org/abs/2503.04412

1•vrm•39m ago•0 comments

Should you lose your rights with age?

https://news.harvard.edu/gazette/story/2025/07/as-wave-of-dementia-cases-looms-law-school-looks-to-preserve-elders-rights/

2•gnabgib•42m ago•1 comments

Self-hostable AT Protocol backlink index that runs on a RPi 4

https://github.com/at-microcosm/links/tree/main/constellation

1•ffin•44m ago•0 comments

Cross-Device Flows: Security Best Current Practice

https://www.ietf.org/archive/id/draft-ietf-oauth-cross-device-security-10.html

3•mooreds•45m ago•0 comments

The Eiffel Tower is closed to tourists due to searing heat

https://www.cnn.com/2025/07/01/weather/europe-heat-wave-global-warming

1•mooreds•47m ago•0 comments

Dewdrop: A Java Event Sourcing Framework

https://dewdrop.events/

2•mooreds•48m ago•0 comments

You MUST Listen to RFC 2119

https://ericwbailey.website/published/you-must-listen-to-rfc-2119/

4•zdw•48m ago•1 comments

Show HN: Conduit – Turn large text files into listenable audio

https://conduit-landing-page-git-master-tobys-projects-a638df7e.vercel.app/

2•tboneskibs•50m ago•0 comments

Show HN: I built a procedural universe in Python to explore simulation theory

https://github.com/SurceBeats/Atlas

1•SurceBeats•56m ago•1 comments

Trump threatens Tesla, SpaceX support

https://www.reuters.com/business/autos-transportation/elon-musk-renews-criticism-trump-spending-bill-calls-new-political-party-2025-06-30/

9•geox•57m ago•3 comments

Qantas says 6M customers caught up in cyberattack

https://www.afr.com/companies/transport/qantas-says-6-million-aussies-caught-up-in-cyberattack-20250702-p5mbup

3•sen•58m ago•2 comments

Visual intuitive tool to design predict and optimise complex economic models

https://machinations.io

1•leetrout•58m ago•0 comments

iPhone Satellite Functionality Saves Denver Mountaineer

https://www.macrumors.com/2025/07/01/iphone-satellite-denver-climber/

1•alwillis•1h ago•1 comments

Meta bans two anti-Zionist comedians from Instagram

https://mondoweiss.net/2025/07/metas-banning-of-two-anti-zionist-comedians-from-instagram-is-the-latest-example-of-big-techs-deep-anti-palestinian-bias/

9•siltcakes•1h ago•0 comments

Australians to face age checks from search engines

https://ia.acs.org.au/article/2025/australians-to-face-age-checks-from-search-engines.html

16•stubish•1h ago•7 comments

Cursor for the first time today. It was perfect until

https://medium.com/@tahaymerghani/cursor-fixed-everything-until-it-didnt-1e8c20a8f30b

1•taha_moji•1h ago•0 comments

Proximity to Golf Courses and Risk of Parkinson Disease

https://jamanetwork.com/journals/jamanetworkopen/fullarticle/2833716

1•pseudolus•1h ago•0 comments

AI: Great Expecations (1988) [pdf]

https://people.csail.mit.edu/brooks/idocs/AI_hype_1988.pdf

1•Rexxar•1h ago•0 comments

European consumers are mostly saying 'non' to trading in their old phones

https://www.theregister.com/2025/06/18/used_phones_europe/

2•PaulHoule•1h ago•0 comments

Homes Are Taking Longer to Sell in US Markets That Once Flourished

https://www.bloomberg.com/news/articles/2025-07-01/homes-now-harder-to-sell-in-florida-us-south-real-estate-markets

3•JumpCrisscross•1h ago•4 comments