- 摘 要
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(北京市建筑設計研究院有限公司, 北京 100062)
摘要: 針對最大懸挑長度為 35. 2m 大跨度懸挑連廊在人致激勵下的舒適度問題,采用有限元分析軟件 SAP2000建立結構三維分析模型,計算多種人致激勵工況下結構減振前后的加速度響應,對比了調諧質量阻尼器(TMD)和多重調諧質量阻尼器(MTMD)減振方案的減振效果. 分析結果表明:連廊在人致激勵作用下產生的最大加速度超過舒適度限值,利用 TMD 可有效減小結構振動,改善舒適度性能. 但單頻 TMD 控制頻帶較窄,只對特定振動頻率的減振效果明顯. 為改善其魯棒性,拓寬有效頻帶寬度,最終采用具有分布頻率的 MTMD 減振方案,在保證經(jīng)濟性最優(yōu)的前提下,對多種頻率激勵荷載均得到了顯著的減振效果,使連廊滿足舒適度要求.
關鍵詞: 大跨度懸挑連廊; 舒適度分析; 減振; 多重調諧質量阻尼器; 魯棒性
中圖分類號:TU318 文獻標志碼:A 文章編號:1002-848X(2023)08-0086-04
DOI:10. 19701 / j. jzjg. 20220792
Application of MTMD vibration reduction technology in design of a large-span cantilever corridor
GUAN Yu
(Beijing Institute of Architectural Design, Beijing 100062, China)
Abstract: Aiming at the comfort of the large-span cantilevered corridor with a maximum overhang length of 35. 2m underhuman-induced excitation, a three-dimensional structural analysis model was established using the finite element analysissoftware SAP2000 to calculate the acceleration response of the structure before and after vibration reduction under varioushuman-induced excitation conditions, and the vibration reduction effects of tuned mass damper (TMD) and multiple tunedmass damper ( MTMD) vibration reduction schemes were compared. The analysis results show that the maximumacceleration of the corridor under human-induced excitation exceeds the comfort limit, and adopting TMD can effectivelyreduce the structural vibration and improve the comfort performance. However, the single-frequency TMD control frequencyband is narrow, and the damping effect is only obvious for the specific vibration frequency. In order to improve itsrobustness and broaden the effective frequency band width, the MTMD vibration reduction scheme with distributedfrequency was finally adopted. On the premise of ensuring the optimal economic performance, significant vibration reductioneffects are obtained for various frequency excitation loads, so that the corridor meets the comfort requirements.
Keywords:large-span cantilevered corridor; comfort analysis; reduce vibration; multiple tuned mass damper; robustness
作者簡介:關宇,碩士,高級工程師,一級注冊結構工程師,主要從事建筑工程結構設計,Email:612624@ qq. com.
[引用本文] 關宇. MTMD 減振技術在大跨度懸挑連廊設計中的應用[ J]. 建筑結構,2023,53( 8):86-89,77.GUAN Yu. Application of MTMD vibration reduction technology in design of a large-span cantilever corridor[J]. BuildingStructure,2023,53(8):86-89,77.
