High-rise Buildings

Detect Vibration Issues of Dynamic Sensitive Structures

High-rise Buildings

The slender design of high-rise buildings makes them sensitive to ambient excitation due to the wind or strong motion events such as earthquakes.

One of the challenges of analyzing high-rise buildings is the typical use of architectural symmetry. This causes closely spaced modes, i.e. modes have different mode shapes but natural frequencies of more or less same values.

Structure tests of Heritage Court Tower

This 15-storey building is located on top of an underground parking structure. The customer conducted Modal Analysis measurements using ARTeMIS Modal Pro.

Case: Heritage Court Tower, Vancouver, British Columbia, Canada

How ARTeMIS is used for High-rise Buildings

ARTeMIS Modal

The slender design of high-rise buildings makes these dynamic sensitive to ambient excitation such as wind and micro-tremors as well as strong motion events such as earthquakes. To reduce the effects of ambient excitation tuned damping systems are often used in this type of structure. 

ARTeMIS-SHM

Buildings are designed to stand for many years. However, the health of a structure can deteriorate over years of service due to many reasons. Therefore, continuous monitoring should be undertaken for critical structures in as early a state as possible. 

Find out more about ARTeMIS Modal
Find out more about ARTeMIS-SHM
The analysis is divided into four Test Setups, where the sensors are moved to new locations leaving only two in fixed reference positions. ARTeMIS Modal supports single as well as multiple Test Setups analysis. The configuration file as well as the measurement files for project is installed along with ARTeMIS Modal.

Interstorey Drift Analysis

The Drift Analysis Module is designed to analyze interstorey drift based on measurements from sensors located at the top and bottom of structural elements. These elements can e.g. be columns. If the drift exceeds a certain percentage of the distance between the sensor locations, the module will automatically alert the user.

Drift Analysis of a 54 storey building in Los Angeles during the 1994 Northridge Earthquake. The critical relative drift ratio has been set to 0.1%, which has triggered four out of the nine drift definitions. The selected definition has triggered one time shortly after the most intense shaking.
Drift Analysis is a powerful tool for the study of growing damage in structural elements. Here the relative drift of two structural elements is observed. It has been calculated using 22 measurements on a structure exhibiting an increasing damage. The two curves in the top diagram depict the development of the relative drift of each of the two structural elements. The damage affects the structural element corresponding to the blue curve most. In the diagram at the bottom, a damage indicator of the overall structural integrity is also shown for the same 22 measurements (available using the damage detection module). It is clear to see that damage starts at the ninth measurement, where damage indicators turn red, and the relative drift ratios start increasing significantly.

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