本文關(guān)鍵詞：型鋼混凝土異形柱空間框架結(jié)構(gòu)模型振動(dòng)臺(tái)試驗(yàn)研究　出處：《建筑結(jié)構(gòu)學(xué)報(bào)》2017年02期 　論文類型：期刊論文

  更多相關(guān)文章： 型鋼混凝土 異形柱 空間框架 振動(dòng)臺(tái)試驗(yàn) 抗震性能

【摘要】：采用三維6自由度模擬地震振動(dòng)臺(tái)對(duì)1∶4縮尺的型鋼混凝土異形柱空間框架結(jié)構(gòu)模型進(jìn)行了三種地震波輸入試驗(yàn)。通過(guò)白噪聲掃描得到了該模型結(jié)構(gòu)的自振頻率、振型、阻尼比等動(dòng)力特性,研究了模型的破壞特征、加速度、位移反應(yīng)、樓層剪力和應(yīng)變反應(yīng)。試驗(yàn)結(jié)果表明:隨著地震峰值加速度的增加,框架模型的自振頻率下降,阻尼比增大,加速度放大系數(shù)逐漸減小,結(jié)構(gòu)振動(dòng)以第1階振型為主;在罕遇地震作用下,層間側(cè)向剛度退化較快,結(jié)構(gòu)整體側(cè)向位移曲線呈S形,樓層剪力沿樓層高度方向呈遞減趨勢(shì);在彈塑性工作階段,第1層邊框架角柱和邊柱平行于主振方向一側(cè)的型鋼翼緣首先屈服,第3層邊框架梁端隨后出現(xiàn)塑性鉸。由應(yīng)變分析可知,邊框架角柱及其梁端為抗震薄弱區(qū)域;型鋼混凝土異形柱框架結(jié)構(gòu)抗震性能良好,彈塑性工作階段后期,模型結(jié)構(gòu)耗能顯著提高。
[Abstract]:Using 3-D 6-DOF simulated seismic shaking table pair 1:. 4. Three kinds of seismic wave input tests have been carried out for the spatial frame structure model of special-shaped steel reinforced concrete columns with scale. The natural vibration frequency of the model structure has been obtained by scanning the white noise. The failure characteristics, acceleration, displacement response, floor shear and strain response of the model are studied in this paper. The experimental results show that with the increase of the peak acceleration of the earthquake, the dynamic characteristics of the model, such as vibration mode and damping ratio, are studied. The natural vibration frequency of the frame model decreases, the damping ratio increases, and the acceleration magnification coefficient decreases gradually. Under the action of rare earthquake, the lateral stiffness of the floor degenerates rapidly, the overall lateral displacement curve of the structure is S-shaped, and the shear force of the floor decreases along the direction of the height of the floor. At the stage of elastic-plastic work, the flange of the first layer frame corner column and the edge column parallel to the side of the main vibration direction first yield, and then the plastic hinge appears at the end of the third layer edge frame beam, which can be seen from the strain analysis. The edge frame corner column and its beam end are seismic weak area; The steel reinforced concrete special-shaped column frame structure has good seismic performance, and the energy consumption of the model structure increases significantly in the later stage of elastic-plastic work.
【作者單位】： 西安建筑科技大學(xué)土木工程學(xué)院;武警后勤學(xué)院建筑工程系;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(51308444) 陜西省自然科學(xué)基礎(chǔ)研究基金項(xiàng)目(2014JQ7288) 西安建筑科技大學(xué)創(chuàng)新團(tuán)隊(duì)項(xiàng)目
【分類號(hào)】：TU398.9
【正文快照】： 0引言由于異形柱結(jié)構(gòu)建筑功能好,實(shí)用性強(qiáng),國(guó)內(nèi)外學(xué)者對(duì)該類結(jié)構(gòu)進(jìn)行了大量研究,Marin[1]、Rammamurthy等[2]、Cheng等[3-4]對(duì)鋼筋混凝土異形柱的力學(xué)性能及設(shè)計(jì)方法進(jìn)行了研究。Tokgoz等[5]對(duì)L形截面型鋼混凝土異形柱進(jìn)行了偏心受壓試驗(yàn),分析了柱長(zhǎng)細(xì)比的影響�？倒荣O等[6-7]

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