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中文標題: 具自復位功能之同心斜撐構架耐震行為研究
英文標題: Seismic Behavior of Self-centering Designed Concentrically Braced Frames
編號: NCREE-12-008
語言: 中文
編輯:
媒體型式: 紙本
作者:
鄭錦銅   顏嘉毅   周志雄   陳安志   
中文摘要: 一般而言,同心斜撐構架(CBF) 透過對角配置斜撐來消散地震力。然而在地震過後結構物留下過大的殘留變形,使得結構物難以修復。故本文對具自復位功能同心斜撐構架受震後可減少留下之殘留變形之可行性進行探討。在類似的文獻中,由於在梁柱接合處將兩者分開,受地震時令梁端可在柱面上進行搖擺,而未引發任何損壞。本文提出透過梁翼板底部所安裝之摩擦阻尼器或在斜撐上安裝摩擦阻尼器或摩擦鉸阻尼器來消散地震能量。為了驗證此設計想法,本文設計了一個實際尺寸之構架,此構架為單層單跨之同心斜撐構架,並在橫向進行循環反覆載重試驗。研究參數包含了能量消散的型式不同或是位置不同與摩擦材料之不同,如磷青銅和黃銅。試驗的結果顯示,具自復位功能同心斜撐構架可實現少量的殘留變形與較好之耐震性能。而所有的試驗可看出,當在斜撐上安裝磷青銅摩擦阻尼器,可比其他型式斜撐消散較多能量。
英文摘要: Generally seismic force is resisted by the diagonal braces in the Concentrically Braced Frame (CBF). However, large residual deformation after earthquakes makes the structure difficult to repair. Therefore, this paper investigates the feasibility of applying a self-centering function on CBF to reduce the residual deformation after the earthquakes. Similar to literatures, beam-column interfaces are separated so that beams can rock on the column face without inducing any damage during earthquakes. Seismic energy is dissipated through the friction dampers installed at the beam bottom flange, or friction dampers or frictional hinge dampers applied on the braces. To validate the proposed idea, a full-size one storey-one span CBF was constructed and tested under lateral cyclic reversed loads. Investigation parameters include locations or types of energy dissipation applied and different frictional materials such as brass or phosphor bronze. Test results show that the self-centering function on CBF can be achieved with little residual deformations and adequate seismic performance. Among all tests, it can be seen that friction dampers with phosphor bronze installed on the brace dissipated more energy than the other types.
關鍵字: 同心斜撐構架、自復位功能、摩擦阻尼器
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