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  本文選題：芯筒剛臂結(jié)構(gòu)　切入點：振動臺試驗　出處：《土木工程學(xué)報》2014年11期

【摘要】：對一個56層芯筒剛臂純鋼結(jié)構(gòu)進行縮尺模型的振動臺倒塌試驗。試件縮尺比例為1∶40,主要構(gòu)件材料根據(jù)相似關(guān)系選為紫銅。為了揭示地震波共振效應(yīng)對結(jié)構(gòu)的不利影響,選取天然波Chi-Chi TCU117以及基于該波根據(jù)頻譜縮放方法得到的試驗?zāi)Ｐ偷囊浑A共振波作為振動臺輸入。試驗中輸入的地震波為7度小震水平。結(jié)構(gòu)在天然波作用下保持完好,在一階共振波作用下發(fā)生傾覆倒塌。根據(jù)試驗數(shù)據(jù)得到了結(jié)構(gòu)兩種地震波作用下的慣性力,層間剪力以及傾覆彎矩包絡(luò)。數(shù)據(jù)分析發(fā)現(xiàn),具有共振特性的地震波作用下結(jié)構(gòu)響應(yīng)達規(guī)范反應(yīng)譜值的10倍以上,峰值加速度僅在規(guī)范小震/中震等級時就能夠?qū)е陆Y(jié)構(gòu)倒塌。結(jié)構(gòu)的倒塌模式為邊柱破壞引起傾覆,與墨西哥地震中pino Suarez建筑類似。結(jié)構(gòu)的伸臂使得樓層質(zhì)量產(chǎn)生整體轉(zhuǎn)動加速度,使得結(jié)構(gòu)破壞位置轉(zhuǎn)移到下層伸臂以上外柱受壓承載力更薄弱的位置。
[Abstract]:The shaking table collapse test of a pure steel structure with 56 layers of core tube with rigid arm is carried out. The scale ratio of the specimen is 1: 40, and the main component material is selected as red copper according to the similarity relationship. In order to reveal the adverse effect of seismic wave resonance effect on the structure, The natural wave Chi-Chi TCU117 and the first order resonance wave of the experimental model based on the spectrum scaling method are selected as the input of the shaking table. The seismic wave input in the test is 7 degrees small earthquake level, and the structure remains intact under the action of the natural wave. Based on the experimental data, the inertial force, interlayer shear force and the envelope of overturning moment are obtained under the action of the first order resonance wave. Under the action of seismic wave with resonance characteristics, the response of the structure is more than 10 times that of the normal response spectrum, and the peak acceleration can lead to the collapse of the structure only when the magnitude of the normal small / medium earthquake is measured. The collapse mode of the structure is the collapse caused by the failure of the edge column. Similar to the pino Suarez building in the Mexico earthquake, the extension arm of the structure causes the overall rotational acceleration of the floor mass, and the structural failure position shifts to the position where the compressive capacity of the outer column above the lower arm is weaker.
【作者單位】： 同濟大學(xué)土木工程防災(zāi)國家重點實驗室;同濟大學(xué)土木工程學(xué)院;
【基金】：土木工程防災(zāi)國家重點實驗室項目(SLDRCE09-B-07)
【分類號】：TU973.31

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