振动与冲击
振動與遲擊
진동여충격
JOURNAL OF VIBRATION AND SHOCK
2015年
8期
83-92
,共10页
大悬挑结构%弹塑性时程%模型设计%地震响应%振动台试验
大懸挑結構%彈塑性時程%模型設計%地震響應%振動檯試驗
대현도결구%탄소성시정%모형설계%지진향응%진동태시험
large cantilevered structure%elasto-plastic time history analysis%model design%seismic response%shaking table test
某拟建文化艺术中心是一个具有大空间、大悬挑等特点的混凝土框架－剪力墙结构，结构一端为多层大悬挑结构，最大悬挑长度为22 m，并且在顶层中庭有30 m 的大跨度区域，属平面和立面均不规则的结构。采用NOSACAD和ABAQUS有限元程序建立整体结构分析模型，进行7度罕遇烈度下的弹塑性时程分析，研究了该结构在大震作用下的变形情况、塑性铰的分布以及受力机理等。计算结果表明：结构的悬挑端在竖向地震作用下的动力响应显著，剪力墙受拉损伤在结构底部和悬挑楼层处较为明显；但在大震下层间位移角满足规范要求；并对结构裙房截断后的模型进行了1／30的大缩尺模拟地震振动台试验，验证了截断模型方法在本试验中的合理性，最后根据构件的受力或损坏情况给出了设计改进建议。
某擬建文化藝術中心是一箇具有大空間、大懸挑等特點的混凝土框架－剪力牆結構，結構一耑為多層大懸挑結構，最大懸挑長度為22 m，併且在頂層中庭有30 m 的大跨度區域，屬平麵和立麵均不規則的結構。採用NOSACAD和ABAQUS有限元程序建立整體結構分析模型，進行7度罕遇烈度下的彈塑性時程分析，研究瞭該結構在大震作用下的變形情況、塑性鉸的分佈以及受力機理等。計算結果錶明：結構的懸挑耑在豎嚮地震作用下的動力響應顯著，剪力牆受拉損傷在結構底部和懸挑樓層處較為明顯；但在大震下層間位移角滿足規範要求；併對結構裙房截斷後的模型進行瞭1／30的大縮呎模擬地震振動檯試驗，驗證瞭截斷模型方法在本試驗中的閤理性，最後根據構件的受力或損壞情況給齣瞭設計改進建議。
모의건문화예술중심시일개구유대공간、대현도등특점적혼응토광가－전력장결구，결구일단위다층대현도결구，최대현도장도위22 m，병차재정층중정유30 m 적대과도구역，속평면화립면균불규칙적결구。채용NOSACAD화ABAQUS유한원정서건립정체결구분석모형，진행7도한우열도하적탄소성시정분석，연구료해결구재대진작용하적변형정황、소성교적분포이급수력궤리등。계산결과표명：결구적현도단재수향지진작용하적동력향응현저，전력장수랍손상재결구저부화현도루층처교위명현；단재대진하층간위이각만족규범요구；병대결구군방절단후적모형진행료1／30적대축척모의지진진동태시험，험증료절단모형방법재본시험중적합이성，최후근거구건적수력혹손배정황급출료설계개진건의。
A culture and art center discussed here was a RC frame-wall structure characterized with a large cantilevered length and a large space,the maximum cantilevered length was 22m and the maximum span of the large space was 30m.It was irregular both in plan and elevation.Using Nosacad and Abaqus,the structural analysis model was established in order to simulate the nonlinear behavior and study deformations,distribution of plastic hinges,and force-bearing mechanism of the structure under the rare earthquake of magnitude of 7 .The analysis results showed that the cantilevered end of the structure is sensitive to vertical earthquake;tension damage mainly occurs at the bottom of the shear wall and the cantilevered stories;the maximum inter-story drifts are less than the seismic design requirement of Chinese code.A 1/30 scale model was tested on a shaking table to study the seismic behavior of this kind structure after cutting the podium of the structure,the comparison between the results before and after cutting was conducted to verify the reasonability of this design method.The test results agreed well with those of the finite element analysis.Finally,according to the response and damage results of the structure,suggestions for structure design improvment were given.
