Dynamic Response Analysis of Elevator Model

Yang, T. Y.; Kullegowda, H.; Kapania, Rakesh K.; Schiff, Anshel J.

doi:10.1061/(asce)0733-9445(1983)109:5(1194)

Cited by 11 publications

(11 citation statements)

References 6 publications

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“…Analytical studies of the seismic behavior of elevators have been conducted previously ; however, experimental validation of these computational models has been hampered by limited experimental data regarding the seismic performance of these systems. To the authors' knowledge, shake table testing of full‐scale guide rail counterweight subassemblies conducted in Taiwan is the only experimental investigation on elevator systems to date.…”

Section: Introductionmentioning

confidence: 99%

Shake table testing of an elevator system in a full‐scale five‐story building

Wang

Hutchinson

Astroza

et al. 2016

Earthq Engng Struct Dyn

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SUMMARY This paper investigates the seismic performance of a functional traction elevator as part of a full-scale five-story building shake table test program. The test building was subjected to a suite of earthquake input motions of increasing intensity, first while the building was isolated at its base, and subsequently while it was fixed to the shake table platen. In addition, low-amplitude white noise base excitation tests were conducted while the elevator system was placed in three different configurations, namely, by varying the vertical location of its cabin and counterweight, to study the acceleration amplifications of the elevator components due to dynamic excitations. During the earthquake tests, detailed observation of the physical damage and operability of the elevator as well as its measured response are reported. Although the cabin and counterweight sustained large accelerations due to impact during these tests, the use of well-restrained guide shoes demonstrated its effectiveness in preventing the cabin and counterweight from derailment during high-intensity earthquake shaking. However, differential displacements induced by the building imposed undesirable distortion of the elevator components and their surrounding support structure, which caused damage and inoperability of the elevator doors. It is recommended that these aspects be explicitly considered in elevator seismic design.

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Section: Introductionmentioning

confidence: 99%

Shake table testing of an elevator system in a full‐scale five‐story building

Wang

Hutchinson

Astroza

et al. 2016

Earthq Engng Struct Dyn

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“…The counterweight is perhaps the most vulnerable component of elevator, primarily because it is also the heaviest part of an elevator system. Therefore, the studies on seismic response and performance evaluations of counterweight-rail systems have been of continued research interest for the last 25 years [5][6][7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Seismic protection of counterweight–rails in elevators in buildings

Rildova

Singh

2005

Earthq Engng Struct Dyn

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SUMMARYThe counterweight in an elevator, being the heaviest component, can often overstress the guide rails during a strong earthquake. To reduce the in-plane counterweight response, the use of a part of the counterweight mass as a tuned mass damper in the passive and active modes is examined. The passive TMDs can reduce the stresses in the rails, but their performance can be signiÿcantly improved when they are used in the active mode. An actuator with saturation capacity less than 10% of the weight of the counterweight could reduce the critical stress response to as low a level as, or even lower than, the maximum response induced by the out-of-plane motion of the counterweight.

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“…These dynamic effects have often damaged the counterweight rails and other hardware attached to the system. Several studies [5,9,10,12] were conducted to examine the dynamic behavior of these systems with different models, including a few recent ones by the writers [4,6,7]. In the most recent study [7], the writers have used an analytical model of the counterweight with roller guides, including the flexibilities of all supporting and guiding components (e.g., roller guide assemblies, guide rails and support brackets).…”

Section: Introductionmentioning

confidence: 99%

Acceleration Feedback‐Based Active and Semi‐Active Seismic Response Control of Rail‐Counterweight Systems of Elevators

Rildova

Singh

2005

Shock and Vibration

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Based on the observations in the past earthquake events, the traction elevators in buildings are known to be vulnerable to earthquake induced ground motions. Among several components of an elevator, the counterweight being heaviest is also known to be more susceptible than others. The inertial effects of the counterweight can overstress the guide rails on which it moves. Here we investigate to use the well-known acceleration feedback-based active and semi-active control methods to reduce stresses in the rails. The only way a control action can be applied to a moving counterweight-rail system is through a mass damper placed in the plane of the counterweight. For this, a part of the counterweight mass can be configured as a mass damper attached to a small actuator for an active scheme or to a magneto-rheological damper for a semi-active scheme. A comprehensive numerical study is conducted to evaluate the effectiveness of the proposed configuration of control system. It is observed that the two control schemes are effective in reducing the stress response by about 20 to 25% and improve the system fragility over a good range of seismic intensities.

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Dynamic Response Analysis of Elevator Model

Cited by 11 publications

References 6 publications

Shake table testing of an elevator system in a full‐scale five‐story building

Shake table testing of an elevator system in a full‐scale five‐story building

Seismic protection of counterweight–rails in elevators in buildings

Acceleration Feedback‐Based Active and Semi‐Active Seismic Response Control of Rail‐Counterweight Systems of Elevators

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