- 摘 要
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（1 西安建筑科技大學土木工程學院， 西安 710055； 2 西安建筑科技大學結構工程與抗震教育部重點實驗室， 西安 710055）
［摘要］傳統(tǒng)鋼框筒結構(FTS)耗能能力較差，震后難以快速恢復。為了提高傳統(tǒng)鋼框筒結構的耗能能力、經濟性以及實現(xiàn)震后快速恢復，結合剪切型耗能梁段良好的塑性變形能力、高強鋼強度高節(jié)省鋼材的優(yōu)勢以及鋼框筒結構較大的抗側剛度，提出可更換剪切型耗能梁段-高強鋼框筒結構（HSS-FTS）。為了研究和對比HSS-FTS與傳統(tǒng)FTS的抗震性能，設計了2個不同耗能梁段布置方式的HSS-FTS算例結構以及1個FTS結構算例，采用SAP2000軟件建立其有限元模型，通過推覆分析和非線性動力時程分析對有限元模型的抗震性能進行分析和對比。結果表明：結構的設計指標均能滿足規(guī)范要求；在推覆過程中，HSS-FTS的耗能梁段均先屈服形成塑性鉸，然后裙梁梁端逐漸屈服形成塑性鉸，最后底層柱端形成塑性鉸，結構達到極限狀態(tài)，具有理想的屈服模式；FTS的塑性鉸集中在中下部樓層的裙梁端部和個別柱端，增加了結構倒塌的風險；在大震作用下，所有算例結構的層間側移角滿足規(guī)范限值要求，且HSS-FTS比FTS具有更好的延性和耗能能力；HSS-FTS的塑性鉸集中在耗能梁段，其余構件保持彈性，震后僅需更換損傷嚴重的耗能梁段即可實現(xiàn)結構功能的快速恢復。
［關鍵詞］鋼框筒； 高強鋼； 剪切型耗能梁段； 抗震性能
中圖分類號：TU391文獻標識碼：A文章編號：1002-848X(2020)01-0074-09
Investigation on seismic performance of high-strength steel fabricated steel framed-tube structure with replaceable shear type energy-dissipated beam section
Lian Ming1，2, Han Wenkai1, Mo Wenru1, Su Mingzhou1，2
(1 School of Civil Engineering, Xi′an University of Architecture and Technology, Xi′an 710055, China；2 Key Lab of Structural Engineering and Earthquake Resistance, Ministry of Education (XAUAT), Xi′an 710055, China)
Abstract:The traditional steel frame tube structure (FTS) has poor energy dissipation capacity and is difficult to recover quickly after the earthquake. In order to improve the energy dissipation capacity and economy of the traditional steel frame tube structure and realize the rapid recovery after the earthquake, the high-strength steel fabricated steel framed-tube structure (HSS-FTS) with replaceable shear type energy-dissipated beam section was proposed considering the good plastic deformation capacity of the shear type energy-dissipated beam section, the advantages of high strength and saving steel of high-strength steel and the greater lateral stiffness of the steel framed-tube structure. In order to study and compare the seismic performance of HSS-FTS and traditional FTS, two HSS-FTS structures with different energy-dissipated beam sections and one FTS structure were designed. SAP2000 software was used to build finite element models. Through Pushover analysis and nonlinear dynamic time-history analysis, the seismic performance of the finite element model was analyzed and compared. The results show that: the design indexes of the structures can meet the requirements of the code; in the process of pushover, the energy-dissipated beam section of HSS-FTS first yields to form a plastic hinge, then the skirt beam end gradually yields to form a plastic hinge, finally the bottom column end forms a plastic hinge, and the structure reaches the limit state with an ideal yield mode; the plastic hinge of FTS is concentrated in the skirt beam end and individual column end of the middle and lower floors, which increases the risk of structural collapse; under the rare earthquake, the interlayer drift angle of all the calculation examples meets the requirements of the code limit, and HSS-FTS has better ductility and energy dissipation capacity than those of FTS; the plastic hinge of HSS-FTS is concentrated in the energy-dissipated beam section, and the rest of the members remain elastic and they can realize the rapid recovery of the structure function after the earthquake only by replacing the seriously damaged energy-dissipated beam sections.
Keywords:steel framed-tube; high-strength steel; shear type energy-dissipated beam section; seismic performance
*國家自然基金項目（51708444），陜西省自然科學基礎研究計劃（2018JQ5074），陜西省高?？茀f(xié)青年人才托舉計劃項目（20170517），陜西省教育廳專項科研計劃項目(18JK0456），陜西省博士后科研項目資助（2017年）。
作者簡介：連鳴，博士，副教授，碩士生導師，Email：lianming@xauat.edu.cn。
