鋼造含摩擦型消能裝置預力梁柱接頭之耐震行為研究

Seismic Behavior of Post-tensioned Steel Beam to Column Connection with Friction Devices

林錦隆(Chin-Lung Lin)

指導教授 ： 蔡克銓

共同指導教授 ： 周中哲

國立臺灣大學/工學院/土木工程學研究所/碩士(2006年)

https://doi.org/10.6342/NTU.2006.02030

摘要

含摩擦型消能裝置預力梁柱接頭結合預力鋼腱與摩擦消能元件之特性，藉由鋼腱之初始預力提供梁柱接頭自行復位之能力，而利用梁腹摩擦消能裝置提供梁柱接頭遲滯消能之機制，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之能力。本研究探討含摩擦型消能裝置預力梁柱接頭的特性及其力學行為，利用四組螺栓接合進行摩擦消能裝置拉伸試驗，及四組實尺寸梁柱接頭試驗，探討相關試驗規劃、分析與試驗結果。本研究之主要結論為：(1)摩擦消能裝置拉伸試驗得知由銅跟鋼所組成的摩擦介面有穩定之遲滯行為，全新的摩擦介面起初摩擦力較小，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，因此相關之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金屬降伏型消能裝置之預力梁柱接頭，不會因消能配件殘餘應力之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之預力梁柱接頭行為。

關鍵字

預力梁柱接頭 ； 摩擦消能

並列摘要

Post-tensioned (PT) steel beam to column connection constructed with friction devices (FDs) combines the characteristics of pre-stressed strands and frictional energy dissipating devices. Thus, the post-tensioned system possesses re-centering capability from the pre-stressed strands while dissipating seismic energy in the beam web friction devices. This paper first derives the force-deformation relationships of the post-tensioned 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. The paper concludes with the design recommendations for self-centering moment connections using friction devices.

並列關鍵字

friction devices ； post-tensioned ； beam to column connection

參考文獻

19. 蔡克銓、莊勝智 (2004)，“ 含預力構件構架耐震行為研究 ”，國家地震工程研究中心報告編號NCREE-04-024。

20. 楊文嘉、蔡克銓 (2005)，“ 鋼造預力梁柱接頭行為研究 ”，國立台灣大學土木工程研究所碩士論文。

1. Christopoulos, C., Filiatrault, A., Uang, C.M., and Folz, B. (2002). “Posttensioned Energy Dissipating Connections for Moment-Resisting Steel Frames.” J. Struct. Eng., 128(9), 1111-1120.

2. Christopoulos, C., Filiatrault, A., and Folz, B. (2002). “Seismic Response of Self-Centring Hysteretic SDOF Systems.” Earthquake Engng Struct. Dyn., 31, 1131-1150.

3. DesRoches, R., McCormick, J. and Delemont, M. (2004), “Cyclic Properties of Superelastic Shape Memory Alloy Wires and Bars.” J. Struct. Eng., 130(1), 38~46.