- 摘 要
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(華東建筑設計研究院有限公司, 上海 200002)
摘要: 某鋼結構酒店首層與 2 層層高較高、剛度較弱,小震及罕遇地震下 2 層層間位移角存在突變且不滿足限值要求. 結構設計時從建筑空間需求及結構合理性出發(fā),應用速度型油阻尼器進行了消能減震設計研究. 為提升消能減震優(yōu)化設計研究效率,通過 Push-Over 分析獲得各樓層三折線荷載-位移曲線,在此基礎上將整體結構模型簡化為剪切層模型,主要指標對比分析結果驗證了剪切層模型能夠較好模擬整體結構模型. 基于動力彈塑性時程分析對剪切層模型開展了不同數(shù)量油阻尼器減震效率研究,獲得了結構兩個方向相對更優(yōu)的阻尼器數(shù)量,并介紹了這些阻尼器在平面中的位置及典型連接構造. 同時對設置阻尼器的消能減震結構與常規(guī)剛度加強結構動力彈塑性時程進行分析比較,結果表明滿足位移限值要求且變形均勻的減震結構構件尺寸較小,減震結構構件罕遇地震下?lián)p傷相對較少;通過消能減震結構優(yōu)化設計技術提升了建筑的使用品質,阻尼器很好地保護了主體結構.
關鍵詞: 鋼結構; 油阻尼器; 剪切層模型; 減震優(yōu)化設計; 結構損傷
中圖分類號:TU391 文獻標志碼:A 文章編號:1002-848X(2022)09-0119-06
DOI:10. 19701 / j. jzjg. ZJ220002
Research on optimization design of energy dissipation of a steel structure based on shear layer model
WANG Hongjun
(East China Architectural Design & Research Institute Co. , Ltd. , Shanghai 200002, China)
Abstract: The first and second floors of a steel structure hotel are high in height and weak in stiffness, and there is asudden change in the displacement angle between the two floors under small earthquakes and rare earthquakes, which donot meet the limit requirements. Considering architectural space and structural rationality, energy dissipation designresearch was carried out by using velocity oil damper. In order to improve the research efficiency of the optimization designof energy dissipation, the three-fold line load-displacement curve of each floor was obtained through Push-Over analysis.On this basis, the overall structure model was simplified as a shear layer model, and the comparison and analysis results ofthe main indicators verify that the shear layer model can better simulate the overall structure model. Based on dynamicelastic-plastic time-history analysis, the shear layer model was studied on the energy dissipation efficiency of differentnumbers of oil dampers, and the relatively optimal number of dampers in the two directions of the structure was obtained,and the positions of these dampers in the plane and the typical connection construction were introduced. At the same time,the dynamic elastic-plastic time-history analysis of the energy dissipation structure with dampers and the conventionalstiffness-enhanced structure was analyzed and compared. The results show that the energy dissipation structural membersthat meet the displacement limit requirements and have uniform deformation are small in size, and the damage of energydissipation structural members under rare earthquakes is relatively less. The use quality of the building is improved throughthe optimal design technology of energy dissipation structure, and the damper protects the main structure well.
Keywords:steel structure; oil damper; shear layer model; energy dissipation optimization design; structural damage
第一作者:王洪軍,博士,高級工程師,一級注冊結構工程師,主要從事復雜建筑結構設計研究,Email:whjh1329@ ecadi. com.
[引用本文] 王洪軍. 基于剪切層模型的鋼結構酒店減震優(yōu)化設計研究[ J] . 建筑結構,2022,52( 9) :119-124,131. WANG Hongjun. Research on optimization design of energy dissipation of a steel structure based on shear layer model[ J] . Building Structure,2022,52(9) :119-124,131.
