雙向鋼板剪力牆邊界梁柱耐震設計與分析研究

Seismic design and analysis on boundary elements in bidirectional steel plate shear walls

10.6849/SE.201903_34(1).0001

楊依璇(Yi-Hsuan Yang)；黃彤(Tung Huang)；李昭賢(Chao-Hsien Li)；蔡青宜(Ching-Yi Tsai)；蔡克銓(Keh-Chyuan Tsai)

三維鋼板剪力牆 ； 邊界柱 ； 容量設計 ； 軸彎剪互制 ； 有限元素模型分析 ； 合成梁 ； bi-directional steel plate shear walls ； capacity design ； axial ； shear and flexural interaction ； finite element model analysis ； composite beam

結構工程

34卷1期（2019 / 03 / 01）

5 - 25

繁體中文

針對雙向鋼板剪力牆底層角落邊界柱須抵抗兩正交向剪力牆之作用，本研究利用過去研究所提單向剪力牆底層邊界柱設計方法，考量雙向構架及鋼板共同造成之彎矩、剪力及軸力互制關係，設定底層柱塑鉸高程在0.3倍柱高，提出雙向鋼板剪力牆邊界柱設計方法。為驗證所提之設計方法，本研究利用四組兩層L型平面之雙向鋼板剪力牆有限元素模型進行分析，分析結果顯示，所提設計方法可準確預測底層受壓邊界柱之雙向彎矩需求分佈與塑鉸發生位置。此外箱型邊界柱須承受與柱面垂直之鋼板拉力場作用力，柱面板厚不足時可能導致局部非線性變形，本研究亦探討雙向鋼板剪力牆交界處邊界箱型柱面外受拉力與變形之關係，並提出耐震設計方法。鋼板剪力牆頂層邊界梁構件須承受下方鋼板下拉力引致之正彎矩，本研究以有限元素分析探討邊界鋼寬翼梁與混凝土樓板合成之行為，分析結果顯示當合成梁受來自鋼梁下方之鋼板拉力，混凝土樓板與鋼梁之共同作用行為並不明顯，因此本研究建議設計時應保持一般鋼寬翼斷面梁之設計方法，僅考量鋼骨之彎矩強度。

The aim of this research is to propose a seismic design method for the corner vertical boundary elements (VBEs) in bidirectional steel plate shear walls (SPSWs) through a series of analytical and experimental studies. The VBEs at the intersection of bidirectional SPSWs must sustain the force demands induced from the two SPSWs simultaneously. The column axial force, bi-directional moments and shears are incorporated in the proposed procedures in computing the reduced column flexural capacities. The location of the bottom column flexural hinge is set at an elevation of 0.3 times the first story column height in order to achieve both performance and economy goals. In this paper, the effectiveness of the proposed design method is verified by four two-story L-shape bidirectional SPSW finite element model (FEM) analyses. The pushover analyses on the FEMs confirm that the flexural demands and the plastic hinge locations of the bottom corner VBEs can be predicted by the proposed method. This research also investigates the effectiveness of the composite action of the concrete slab and steel beam in the SPSW's top boundary element using FEM analysis. Analysis results show that the composite action is not pronounced since the vertical downward panel forces are applied on the beam bottom flange.

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