Skyscraper Sway
Skyscraper Sway - Related Videos
14:52
Computerized Dynamic Posturography for Postural Control Assessment in Patients with Intermittent Claudication
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Cited by 57 •
2013
Individuals with intermittent claudication exhibit poor balance compared to healthy controls. Computerized dynamic posturography is an objective method for measuring an individual's postural responses to balance disturbances. This provides an objective reflection of the person’s ability to respond to situations under which sensory stimuli are altered and unexpected perturbations occur.
07:27
Exergaming in Older People Living with HIV Improves Balance, Mobility and Ameliorates Some Aspects of Frailty
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Cited by 18 •
2016
Persons infected with HIV are often frail, depressed and live a sedentary lifestyle for which conventional exercise is too taxing. Here, we present an exercise protocol that ameliorates aspects of frailty in HIV-infected persons. An exergame integrating cognitive control was developed using biosensors that measured balance, weight-shifting and obstacle crossing.
01:34
Groupthink
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2020
When in group settings, we are often influenced by the thoughts, feelings, and behaviors around us. Groupthink is another phenomenon of conformity where modification of the opinions of members in a group aligns with what they believe is the group consensus (Janis, 1972). In such situations, the group often takes action that individuals would not perform outside the group setting because groups make more extreme decisions than individuals do. Moreover, groupthink can hinder opposing trains of...
03:26
Framing Effects
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2020
Information is everywhere and its presentation—such as how and when items are presented—can impact our perceptions and decisions surrounding the info. This broad concept umbrellas framing effects—influences that occur due to the way information is framed in its appearance, whether it’s purely the order or the specific wording of a message. Let’s take a look at numerous ways in which two versions of something can objectively say the same thing, yet we respond in different ways based on the...
10:41
Method to Measure Tone of Axial and Proximal Muscle
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Cited by 5 •
2011
We have developed a device (Twister) to study the regulation of tonic muscle activity during active postural maintenance. Twister measures torsional resistance and muscular responses in standing subjects during twisting of the body axis. The device can be flexibly configured to study various aspects of tonic control across the neck, trunk, and/or hips.
FAQs
Resonance can increase the amplitude of a building’s oscillation when an environmental force interacts strongly with its natural frequency. Natural frequency describes the timing of a structure’s preferred vibration. Because skyscraper sway depends on both amplitude and timing, engineers consider resonance during structural analysis and design measures that help limit uncomfortable or unsafe motion.
Height, stiffness, and mass distribution determine how a building responds dynamically to lateral loading. Changes in these properties influence its natural frequency, the timing of its motion, and the amplitude reached during oscillation. Engineers therefore evaluate the complete structural arrangement rather than treating height alone as the controlling factor when assessing performance.
Wind and earthquakes both produce dynamic loads, but they represent different environmental conditions that can make a building oscillate. Their effects must be considered when analyzing how motion develops and how strongly the structure responds. Accounting for both sources helps engineers evaluate structural safety and occupant comfort under changing environmental conditions.
Aerodynamic shaping can modify how environmental forces act on a building, while reinforced frames and energy-dissipation devices help manage the resulting motion. Tuned mass dampers are one example of a system intended to reduce oscillation. Engineers may combine these approaches so the structure experiences less lateral movement and occupants experience improved comfort.
Engineers begin with structural models to examine how a building’s properties influence vibration. They then use wind-tunnel testing to investigate environmental effects and monitoring systems to observe motion or performance. Together, these approaches connect predicted behavior with measured response, supporting decisions about structural design, vibration control, and performance under changing conditions.
Wind-tunnel testing provides a controlled way to study how a building’s form responds to wind-related loading. It complements structural models by examining the interaction between aerodynamic shape and environmental forces. The resulting information can guide changes to building geometry or support the selection of systems intended to reduce oscillation and improve occupant comfort.
Monitoring systems help engineers examine how a building actually moves under environmental conditions. Their observations can be compared with structural-model predictions and wind-tunnel findings, allowing engineers to evaluate performance rather than relying only on design assumptions. This information supports ongoing assessment of motion, safety, comfort, and the effectiveness of sway-control measures.
Skyscraper sway applies mechanics, resonance, and structural dynamics to a practical engineering problem. These physics principles explain how forces produce motion and how structural properties influence the response. Applying them helps engineers design safer high-rise buildings, select suitable motion-control strategies, and address occupant comfort as environmental conditions change.