New system from MIT may help buildings monitor stress and damage over time

A new computational model developed by researchers at MIT takes ambient vibrations and analyzes them to pick out features in the noise to give indications of a building’s stability, MIT News reports. The feedback can then be used to monitor the building for damage or mechanical stress. Think of it as getting your blood pressure or cholesterol checked regularly to find warning signs of future problems before they become too dire.

The model is being tested on the tallest building on the MIT campus, the 21-story Green Building, a research building made of reinforced concrete. The researchers attached 36 accelerometers to selected floors from the building’s foundation to its roof to record vibrations.

But in order for these recordings to actually serve a purpose, the team needed to figure out how to take the data and link it to the health characteristics of the building, according to Oral Buyukozturk, a professor in MIT’s Department of Civil and Environmental Engineering.

Their solution was to create a computer simulation of the Green Building as a finite element model. MIT News describes this type of model as “a numerical simulation that represents a large physical structure, and all its underlying physics, as a collection of smaller, simpler subdivisions.” The researchers then added parameters to the model, such as the strength and density of concrete walls, slabs, beams, and stairs in each floor.

With all of this done, the researchers are able to then add something like the vibration caused by a passing truck to the simulation in order to see how the model predicts the building and its elements would respond. To make the model as accurate as possible, data from the Green Building's accelerometers was mined and analyzed for key features relating to the building’s stiffness and other indicators of health.

The more data that is added over time, the more intelligent the system becomes. The researchers say they are confident that any real life damage in the building will show up in the system.

This type of model will be especially useful to immediately see, after an event such as an earthquake, if and where there is damage to the building.

The researchers’ vision is for a system such as this to be outfitted on all tall buildings, making them intelligent enough to monitor their own health and provide increased resiliency.

Architectural concrete as we know it today was invented in the 19th century. It reached new heights in the U.S. after World War II when mid-century modernism was in vogue, following in the footsteps of a European aesthetic that expressed structure and permanent surfaces through this exposed material. Concrete was treated as a monolithic miracle, waterproof and structurally and visually versatile.

Blast Hazard Mitigation: Building Openings for Greater Safety and Security

Advances and Challenges in Improving Indoor Air Quality HorizonTV

Coronavirus | Jan 20, 2022

Advances and challenges in improving indoor air quality in commercial buildings

Michael Dreidger, CEO of IAQ tech startup Airsset speaks with BD+C's John Caulfield about how building owners and property managers can improve their buildings' air quality.

3D Printing | Jan 12, 2022

Using 3D-printed molds to create unitized window forms

COOKFOX designer Pam Campbell and Gate Precast's Mo Wright discuss the use of 3D-printed molds from Oak Ridge National Lab to create unitized window panels for One South First, a residential-commercial high-rise in Brooklyn, N.Y.

Total steel project performance

This instructor-led video course discusses actual project scenarios where collaborative steel joist and deck design have reduced total-project costs. In an era when incomplete structural drawings are a growing concern for our industry, the course reveals hidden costs and risks that can be avoided.

Architects | Dec 20, 2021

Digital nomads are influencing design

As our spaces continue to adapt to our future needs, we’ll likely see more collaborative, communal zones where people can relax, shop, and work.

Urban Planning | Dec 15, 2021

EV is the bridge to transit’s AV revolution—and now is the time to start building it

Thinking holistically about a technology-enabled customer experience will make transit a mode of choice for more people.

Healthcare Facilities | Dec 15, 2021

MEP design considerations for rural hospitals

Rural hospitals present unique opportunities and challenges for healthcare facility operators. Oftentimes, the infrastructure and building systems have not been updated for years and require significant improvements in order to meet today’s modern medical demands. Additionally, as these smaller, more remote hospitals are acquired by larger regional and national healthcare systems, the first step by new ownership is often to update and rehabilitate the building. But how can this be done thoughtfully, economically, and efficiently in ways that allow the engineering and facility staff to adapt to the changes? And how can the updates accurately reflect the specific needs of rural communities and the afflictions with which these areas most commonly face?