山腳斷層地震對鋼筋混凝土建築物配置黏彈性制震壁之耐震性能評估
Other Title
Seismic Performance of Reinforced Concrete Buildings with Viscoelastic Damping Wall under Shanchiao Fault Earthquakes
Journal
結構工程
Journal Volume
38
Journal Issue
4
Start Page
106
End Page
129
ISSN
1021-7878
Date Issued
2023-12
Author(s)
Abstract
黏彈性制震壁（Viscoelastic Damping Wall, VEW）為常見的速度型阻尼消能裝置，可用於降低小地震下造成的變形以及提升居住舒適性，但由於其變形能力相較於位移型消能裝置小，因此無法在大地震下提供減震效果。而槓桿黏彈性制震壁（Lever Viscoelastic Damping Wall, LVEW）為「速度型+位移型」的消能裝置，由黏彈性阻尼與摩擦阻尼組合而成，在中小度地震下，藉由槓桿原理放大層間位移，使黏彈性阻尼承受數倍剪變形而提升消能效果；在大地震下，限位裝置限制黏彈性阻尼變形，但啟動摩擦阻尼產生滑動而消散地震能量。本研究選取八層樓和十四層樓鋼筋混凝土建築物，分別代表週期1秒至1.8秒的結構物，並將傳統黏彈性制震壁（VEW）與槓桿黏彈性制震壁（LVEW）配置於結構物中進行非線性動力分析。結構物工址假設位於台北一區且緊鄰山腳斷層，因此採用模擬山腳斷層錯動之加速度歷時進行動力分析，探討在山腳斷層錯動之地震下槓桿黏彈性制震壁與一般黏彈性制震壁對中高樓層的鋼筋混凝土建築物的遲滯行為以及其減震效果。
Viscoelastic damping wall (VEW) is a common velocity-dependent energy-dissipating device, which is used to reduce the lateral deformation of building frames in small earthquake or wind loadings. Its allowable deformation is smaller than the displacement-dependent energy-dissipating device so that VEW is unable to reduce the earthquake response under large earthquakes. The lever viscoelastic damping wall (LVEW) is a new velocity-dependent and displacement-dependent energy dissipating device, which is composed of viscoelastic and frictional damping in one single device. Under small or service level earthquakes, the LVEW could amplify its interstory drift by using a leverage mechanism so it can amplify the shear deformation and energy dissipation of a viscoelastic mechanism to reduce the frame response. Under large earthquakes, the stopper in the LVEW limits the deformation of viscoelastic damper, and activates frictional damping for energy dissipation. In this study, 8- story and 14-story reinforced concrete (RC) buildings with moment-resisting frames and shear walls were designed, representing a fundamental period of 1.0 second and 1.8 seconds. The frames were added with the traditional viscoelastic damping wall (VEW) and the leveraged viscoelastic damping wall (LVEW) for studying their seismic response. The building site was assumed to be located in Taipei Zone 1, close to the Shanchiao fault so the analysis was conducted by using acceleration time histories obtained based on the movement of Shanchiao fault. The work was focused on investigating the seismic response of RC frames with VEWs or LVEWs under Shanchiao fault ground motions.
Subjects
黏彈性制震壁
槓桿黏彈性制震壁
山腳斷層
近斷層效應
非線性動力歷時分析
viscoelastic damping wall
lever viscoelastic damping wall
Shanchiao fault
near-fault effect
nonlinear response time history analysis
Type
journal article