高性能鋼材具有強度高、焊接性好與工作性佳等性質，應用在建築結構上可降低建築成本，然而台灣位處環太平洋地震帶，建築物耐震需求高，特別是都會區建築房屋漸漸往高樓層發展，高性能鋼材的適用性需要進一步的探討。因此，本文以損害控制的理念設計二十層樓BRB斜撐鋼構架，確保地震能量主要由高韌性的挫屈束制消能鋼支撐(Buckling restrained brace, BRB)吸收。設計時以傳統鋼材(SN490B or SN490C)及高性能鋼材(HT690)作為梁柱鋼材，高性能鋼材因縮減結構斷面具有較小的勁度，為尋求不亞於使用傳統鋼材的性能表現，在規範容許的條件下，運用最佳化方法-粒子群優化演算法來搜尋桿件斷面，並進行地震動力分析暨建立易損性曲線檢驗各項結構性能，進一步探討對應於傳統鋼材，運用高性能鋼於結構系統的經濟效益，最後根據分析結果建議初步設計準則。本文利用ABAQUS所提供的自訂材料(User defined material, UMAT)建立非線性材料模擬BRB的遲滯行為並計算斜撐構材損傷指標估計結構的平均壽命，高性能鋼材與高韌性構材結構系統在地震下之性能表現為觀察重點，例如樓層間相對位移角(Drift ratio)、最大樓頂層加速度(Maximum roof acceleration)、BRB遲滯迴圈、主結構桿件與BRB應力比、疲勞累計損傷與剩餘壽命等均為動力分析時評估結構系統性能的依據。

It is well known that using high-performance steel can reduce the construction cost due to its properties of high strength, good weldability and workability. Because Taiwan is located on a high seismic hazard area, seismic demand often plays a very important role in designing a building, especially for buildings located in the metropolitan area.. Thus, the performance of using high-performance steel in building structure has drawn many attentions in recent years. This study desinged two twenty-story steel moment frames in which the concept of damaged controlled design was adopted. To ensure the the seismic enengy can be absorbed by the designed structural member, buckling restrained brace, BRB is used as the major energy dissipation element. For comparison, traditional steel (SN490B or SN490C) and High-performance steel (HT690) are used for two buildings. To maintain the identical structural performance of two buildings, an optimization algorithm, which is based on Particle Swarm Optimization, is used to search the member section for the high-performance steel building. Time history dynamic analyses and fragility curves were built to verify the building performance. In the end, the economic benefition of using high performance steel is discussed. A practical design guildeline is suggested based on the optimization results. This study will use ABAQUS user defined material to simulate the BRB nonlinear hysteretic behavior. A damage index for BRB is proposed to estimate the average life of building. The structural performance is evaluated under several earthquake excitationsusing floor drift, roof maximum acceleration, BRB hysteresis loop, stress ratio in structural members, cumulative fatigue damage and remaining life of a structure.

[1]王錦華，「韌性斜撐構材之力學行為及韌性同心斜撐系統之耐震性能」國立台灣科技大學營建工程系博士論文，2002。
[2]李心弘，「含普通強度鋼材之韌性斜撐構材之遲滯與損傷模式」，國立台灣科技大學營建工程系碩士論文，2004。
[3]C.-C. Chen, S.-Y. Chen and J.-J. Liaw, Application of low yield strength steel on controlled plastification ductile concentrically braced frames, Canadian Journal of Civil Engineering, NRC, 2001。
[4]蔡克銓、吳安傑、林保均、魏志毓、莊明介，「槽接式挫屈束制支撐與脫層材料性能研究」，結構工程第二十七卷第三期，2012。
[5]Abaqus User Subroutines Reference Manual Version 6.12 Chpater:1.1-40。
[6]Y.-F. Dafalias, E.-P. Popov，「Plastic internal variables formalism of cyclic plasticity」，Journal of Applied Mechanics,43.pp.645-645, 1976。
[7]N.-G. Cofie and H. Krawinkler，「Uniaxial Cyclic Stress‐Strain Behavior of Structural Steel」，Journal of Engineering Mechanics, 111(9), 1105-1120. (1985)。
[8]徐義洋，「基因演算法及圖形表示法在結構拓樸最佳化結構動力問題之研究」，國立交通大學土木工程系碩士論文，2013。
[9]陳俊佑，「以基因演算法進行鋼結構最佳化設計之研究」，國立台北科技大學土木與防災研究所碩士論文，2013。
[10]劉琨泰，「超高強度鋼高層建築結構之耐震評估研究」，國立高雄大學土木與環境工程學系碩士論文，2014。
[11]E. Gogou，「Use of High Strength Steel Grades for Economical Bridge Design」，Civil Engineering and Geoscienses, Delft University of Technology lv-infra, Amsterdam，2012。
[12]Eberhart, R. and Kennedy, J.，「A New Optimizper Using Swarm Theory」，Neural Networks, 1995. Proceedings., IEEE International Conference on (Volume:4 )。
[13]內政部營建署，「鋼構造建築物鋼結構設計技術規範-鋼結構及限設計法規範與解說」，2007。
[14]內政部營建署，「建築物耐震設計規範及解說」，2011。
[15]中華民國鋼結構協會，「鋼結構設計手冊(極限設計法)」，2012。
[16]黃少暉，「超高強度鋼材填充型箱型柱之軸向行為」，國立台灣科技大學營建工程系碩士論文，2012。
[17]柴俊甫、鄧崇任、羅俊雄，「近斷層設計地震力與設計地表運動歷時」，國家地震工程研究中心(NCREE-00-033)，2000。
[18]K.W. Liao and Y.K. Wen，「Redunancy in steel moment frame systems under seismic excitations」，Derparment of Civil and Enivronment Engineering, University of Illinois at Urbana-ChampaignUrbana,ILLNOIS，2004。
[19]Y.K. Wen, B.R. Ellingwood and J.Bracci，「Vulnerability Function Framework for Consequence-based Engineering」，MAE Center Project DS-4 Report，2004。
[20]M.A. Miner，「Cumulative damage in fatigue」J. Appl. Mech., 12, pp.159- 164(1954).
[21]American Institute of Steel Construction-341 (2005). Seismic
Provisions for Structural Steel Buildings, ANSI/AISC 341-05.
Chicago, IL: Author.