挫屈束制斜撐鋼構架近斷層地震反應：一樓柱側位移及柱軸力加載歷時發展

Lateral displacement and axial force protocols of the first-story steel column in buckling-restrained braced frames under near-fault earthquake motions

劉郁芳(Yu-Fang Liu) ； 周中哲(Chung-Che Chou) ； 彭冠儒(GuanRu Peng) ； 陳冠儒(Kuan-Ju Chen)

《結構工程》 37卷1期 (2022/03) Pp. 108-132

https://doi.org/10.6849/SE.202203_37(1).0005

摘要

國內多以美國AISC規範中抗彎矩構架梁柱接頭加載歷時作為鋼構試驗參考依據，並未制訂挫屈束制斜撐構架（BRBF）之載重歷時，但因不同構架加載歷時對於結構的非線性行為無法真實反應，且一樓柱在反應建築物行為上最具代表性，因此提出建立BRBF的一樓柱軸力變化及側向位移往覆加載歷時計劃。台灣居住在鄰近活動斷層10公里內之人口超過860萬人，受到近斷層地震機率相當高，若參考美國規範標準載重歷時，將無法反應國內近斷層效應帶來的破壞，因此提出一套涵蓋台灣地理特性考量之鋼構造加載歷時乃十分必要。本研究已完成不同週期BRBF的非線性靜力側推及非線性動力歷時分析，瞭解BRBF在地震作用下力學行為，並提出BRBF之加載歷時建議，期望能作為未來國內鋼結構研究之參考依據。

關鍵字

靜態往覆加載 ； 加載歷時 ； 近斷層地震 ； 非線性動力歷時分析 ； 挫屈束制斜撐

並列摘要

Most of the domestic researchers considered the loading protocol for beam-to column moment connections in moment resisting frame (MRF), specified by AISC, as the reference for static cyclic test. The loading protocols for buckling restrained braced frame (BRBF) had not been developed yet. The nonlinear behavior of a structure cannot be truly reflected using the loading protocols of different type of structure. Since the first story columns are generally used to represent the seismic behavior of a building, loading protocols for the first story columns in BRBF with varied axial force and lateral drift should be developed. Moreover, the loading protocols suggested by American specifications might omit the effect of near-fault earthquakes which is common in Taiwan. Therefore, the near-fault effect on buildings is necessary to be considered for better developing the loading protocols for BRBF in Taiwan. This research has completed the nonlinear static and nonlinear dynamic analysis of BRBF which is designed with various periods for a better understanding of seismic performances of BRBF and developing loading protocols for the first story columns in BRBF with varied axial force and lateral drift. The developed loading protocols for BRBF is expected to be a beneficial reference to steel structure study in the future.

並列關鍵字

static cyclic loading ； loading protocol ； near-fault earthquakes ； nonlinear dynamic analysis ； buckling-restrained brace

參考文獻

ASCE/SEI 7-10 (2010), Minimum design loads for buildings and other structures. American Society of Civil Engineers, Reston, VA.

ASCE/SEI 7-16 (2017), Minimum design loads for buildings and other structures. American Society of Civil Engineers, Reston, VA.

ASCE/SEI 41-17 (2017), Seismic evaluation and retrofit of existing buildings. American Society of Civil Engineers, Reston, VA.

AISC 341-05 (2005), Seismic Provisions for Structural Steel Buildings, AISC 341-05, American Institute of Steel Construction, Chicago, IL.

AISC 341-16 (2016), Seismic Provisions for Structural Steel Buildings, AISC 341-16, American Institute of Steel Construction, Chicago, IL.