【摘要】：鋼管混凝土結(jié)構(gòu)因具有優(yōu)越的抗震性能在高層建筑中應用廣泛,對其在地震作用下的損傷狀態(tài)進行準確評估是基于性能抗震設計理論應用于鋼管混凝土結(jié)構(gòu)抗震設計需要解決的關(guān)鍵問題�，F(xiàn)行的《建筑抗震設計規(guī)范》(GB 50011-2010)有關(guān)抗震性能設計條文主要基于鋼筋混凝土結(jié)構(gòu)制定,結(jié)構(gòu)抗震性能評價指標為層間位移角;《鋼管混凝土結(jié)構(gòu)技術(shù)規(guī)范》(GB 50936-2014)基于鋼筋混凝土結(jié)構(gòu)和鋼結(jié)構(gòu)的層間位移角限值,給出了鋼管混凝土結(jié)構(gòu)層間位移角參考值。然而,已有研究表明,層間位移角作為性能指標因不能考慮地震累積損傷對結(jié)構(gòu)抗震性能的影響存在著評價失效的風險。針對上述問題,為了確保鋼管混凝土結(jié)構(gòu)的抗震安全,本文選用了基于剛度退化的性能指標參數(shù),參照《建筑抗震設計規(guī)范》(GB 50011-2010)性能等級的劃分方法,針對圓形鋼管混凝土和矩形鋼管混凝土柱構(gòu)件,分別提出基于剛度退化指標的各性能水準門檻值,作為現(xiàn)行規(guī)范的補充參考。主要研究內(nèi)容如下:(1)收集111根鋼管混凝土柱構(gòu)件擬靜力試驗數(shù)據(jù),統(tǒng)計分析本文采用的剛度退化指標對于鋼管混凝土柱損傷程度的評價結(jié)果,并對比利用層間位移角為性能指標的評估情況,從而驗證本文采用的剛度退化指標的有效性。(2)參照《建筑抗震設計規(guī)范》(GB 50011-2010)中結(jié)構(gòu)性能水平的劃分方法,本文將鋼管混凝土柱性能水平劃分為基本完好、輕微損壞、中等損壞、嚴重破壞、倒塌等五個性能水準,并結(jié)合鋼管的應力狀態(tài)與鋼管混凝土柱構(gòu)件強度退化程度提出了相應性能水準的判定標準。(3)基于ABAQUS通用有限元分析軟件平臺,通過其UMAT接口分別編寫圓形和矩形鋼管混凝土材料本構(gòu)關(guān)系子程序,并建立兩類鋼管混凝土柱試件的有限元模型,經(jīng)比對有限元模擬結(jié)果與試驗結(jié)果以檢驗有限元模型的可靠性。(4)本文通過變化軸壓比、長細比、徑厚比(寬厚比)、高寬比(僅矩形截面)、混凝土強度及鋼材強度等參數(shù),分別設計了144根圓形鋼管混凝土柱和144根矩形鋼管混凝土柱,利用ABAQUS軟件進行兩類截面鋼管混凝土柱有限元分析,考慮不同參數(shù)對構(gòu)件抗震性能影響。并進一步分析了不同參數(shù)對剛度退化性能指標限值的影響。(5)基于圓形和矩形鋼管混凝土柱構(gòu)件有限元分析結(jié)果,統(tǒng)計分析了性能水準與各影響因素的相關(guān)性,并通過T檢驗確定關(guān)鍵性參數(shù),在此基礎上,建立了兩類鋼管混凝土柱剛度退化性能指標限值回歸計算公式。最后進一步地提出了圓形和矩形鋼管混凝土柱5個性能水準的剛度退化指標門檻值。
[Abstract]:Concrete filled steel tube (CFST) structures are widely used in high-rise buildings because of their excellent seismic performance. It is a key problem to evaluate the damage state of concrete filled steel tubular structures based on the theory of performance-based seismic design. The current Code for Seismic Design of buildings (GB 50011-2010) is mainly based on reinforced concrete structures, and the evaluation index of seismic performance of structures is the displacement angle between floors. The Technical Specification for Concrete-filled Steel Tubular structures (GB 50936-2014), based on the interstory displacement angle limit of reinforced concrete structure and steel structure, the reference value of displacement angle between stories of concrete-filled steel tubular structure is given. However, studies have shown that there is a risk of failure due to the failure of seismic cumulative damage. In order to ensure the seismic safety of concrete-filled steel tubular structures, this paper selects the performance index parameters based on stiffness degradation and refers to the classification method of the performance grade of the Code for Seismic Design of buildings (GB 50011-2010). For circular concrete-filled steel tube (CFST) and rectangular concrete-filled steel tubular column (CFST) members, the performance leveling threshold based on stiffness degradation index is put forward, which can be used as a supplementary reference to the current code. The main research contents are as follows: (1) collect the pseudo-static test data of 111 CFST columns, and analyze the evaluation results of the damage degree of CFST columns by the stiffness degradation index used in this paper. The effectiveness of the stiffness degradation index used in this paper is verified by comparing the evaluation results using the interstory displacement angle as the performance index. (2) referring to the partition method of the structural performance level in the Code for Seismic Design of buildings (GB 50011-2010), In this paper, the performance level of concrete-filled steel tubular columns is divided into five performance levels: basic intact, slight damage, moderate damage, serious damage and collapse. Combined with the stress state of steel tube and the strength degradation degree of CFST column members, the criterion of corresponding performance level is put forward. (3) based on the general finite element analysis software platform of ABAQUS, The constitutive relation subprograms of circular and rectangular concrete-filled steel tube materials are compiled by its UMAT interface, and the finite element models of two kinds of concrete filled steel tubular columns are established. The reliability of the finite element model is verified by comparing the results of finite element simulation and test. (4) by changing axial compression ratio, aspect ratio, ratio of diameter to thickness (ratio of width to thickness), ratio of aspect to width (only rectangular section), In this paper, 144 circular concrete-filled steel tubular columns and 144 rectangular concrete-filled steel tubular columns are designed, and the finite element analysis of concrete filled steel tubular columns with two kinds of sections is carried out by using ABAQUS software. The effect of different parameters on seismic behavior of members is considered. Furthermore, the influence of different parameters on the limited value of stiffness degradation performance index is analyzed. (5) based on the finite element analysis results of circular and rectangular concrete-filled steel tubular column members, the correlation between the performance level and the influencing factors is analyzed statistically. On the basis of T test, two kinds of regression formulas for stiffness degradation performance index of concrete-filled steel tubular columns are established. Finally, the stiffness degradation threshold of circular and rectangular concrete-filled steel tubular columns is proposed.
【學位授予單位】：深圳大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TU398.9;TU352.11

【參考文獻】

相關(guān)期刊論文 前10條

1 許成祥;付晨曦;楊炳;趙斌;;碳纖維布加固震損鋼管混凝土柱抗震性能試驗研究[J];世界地震工程;2015年03期

2 李吉;劉如山;越瀟;;結(jié)構(gòu)抗震破壞準則研究綜述[J];世界地震工程;2015年01期

3 聶瑞鋒;徐培蓁;閻宇;;方鋼管混凝土柱抗震性能試驗研究和仿真分析[J];同濟大學學報(自然科學版);2012年11期

4 史慶軒;侯煒;田園;王秋維;;鋼筋混凝土核心筒性態(tài)水平及性能指標限值研究[J];地震工程與工程振動;2011年06期

5 管民生;韓大建;杜宏彪;吳炎海;;鋼筋混凝土框架結(jié)構(gòu)的抗震性能指標研究[J];深圳大學學報(理工版);2011年03期

6 周緒紅;劉界鵬;張素梅;;方鋼管約束型鋼混凝土短柱抗震性能試驗研究[J];建筑結(jié)構(gòu)學報;2010年07期

7 馬愷澤;梁興文;李斌;;高軸壓比方鋼管高強混凝土柱抗震性能研究[J];工程力學;2010年03期

8 歐陽君;徐千軍;嚴新軍;侍克斌;;基于ABAQUS軟件的土石壩應力應變分析[J];水資源與水工程學報;2009年06期

9 曹正國;周克榮;;基于性能的抗震設計理論探討[J];中外建筑;2006年01期

10 李學平,呂西林,郭少春;反復荷載下矩形鋼管混凝土柱的抗震性能Ⅰ:試驗研究[J];地震工程與工程振動;2005年05期

，

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