鋼造含摩擦型消能裝置預力梁柱接頭之耐震行為研究
Other Title
Seismic Self-Centering Steel Beam-To-Column Moment Connections Using Bolted Friction Device
Journal
中國土木水利工程學刊
Journal Volume
20
Journal Issue
1
Start Page
97
End Page
110
ISSN
1015-5856
Date Issued
2008-03
Abstract
含摩擦型消能裝置預力梁柱接頭結合預力鋼鍵與摩擦消能元件之特性，藉由鋼腱初始預力提供梁柱接頭自行復位能力，梁腹摩擦消能裝置提供梁柱接頭遲滯消能機制，因此整體預力式建築結構系統在受震時可具有自行復位、殘餘變位小及遲滯消能能力。本研究探討含摩擦型消能裝置預力梁柱接頭的特性及力學行為，利用四組螺栓接合進行摩擦消能裝置反覆載重試驗，及四組實尺寸梁柱接頭試驗，探討相關試驗規劃、分析與結果。本研究主要結論為：(1)摩擦消能裝置反覆載重試驗得知由銅與鋼所組成的摩擦介面有穩定遲滯行為，全新的摩擦介面初始摩擦力較小，隨著摩擦次數增加而逐漸增大，並趨近於定值，試驗顯示摩擦係數約為0.34；(2)由於摩擦機制產生之遲滯迴圈近乎矩形，因此相關試驗結果證實預力梁柱接頭能設計解壓彎矩強度提高至0.6倍鋼梁標稱彎矩強度，且解壓彎矩不會似採其他金屬降伏型消能裝置之預力梁柱接頭，因消能配件殘餘應力影響而造成解壓彎矩下降；(3)本研究所提之理論方法能夠準確預測含摩擦型消能裝置預力梁柱接頭行為。
This paper first derives the force-deformation relationships of the posttensioned steel beam to column connection constructed with bolted web friction devices. The paper then describes the test program conducted in the National Center for Research on Earthquake Engineering on four bolted friction devices and four full-scale PT beam-to-column moment connection subassemblies. Tests confirm that (1) hysteretic behavior of four bolted friction devices is very stable, and the friction coefficient between the steel plate and the brass shim is about 0.34, (2) the proposed force-deformation relationships accurately predict the experimental responses of the PT connections under cyclically increasing deformations up to a peak beam rotation of 0.05 radians, (3) the PT connection using the FDs can be designed with a higher decompression moment than those using other type of metallic yielding energy-dissipating devices, (4) the decompression moments do not degrade as beam cyclic deformations increase.
Subjects
預力構架
抗彎梁柱接頭
自動復位
摩擦消能裝置
post-tensioned structure
moment connection
self-centering
friction device
Type
journal article