底層大開間框剪組合墻結(jié)構(gòu)框支墻梁試驗研究
王鳳來 唐岱新 朱本全 張前國 李慶剛 薛宏偉
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王鳳來 唐岱新 朱本全 （哈爾濱工業(yè)大學(xué)土木工程學(xué)院 150090）張前國 李慶剛 薛宏偉 （遼寧省建筑設(shè)計研究院 沈陽 110005）
[提要] 框支墻梁是底層大開間框剪組合墻房屋中的關(guān)鍵構(gòu)件，結(jié)合擬動力試驗對其進行的靜力和抗震性能研究表明，房屋的縱、橫向托梁均與其上墻體形成墻梁結(jié)構(gòu)，并共同形成受力復(fù)雜的空間結(jié)構(gòu)體系，從而使縱向框支墻梁承擔(dān)的荷載明顯減少。在水平地震作用下，縱向框支墻梁承擔(dān)的荷載較靜載情況雖有明顯增加，但其墻梁結(jié)構(gòu)的受力機理沒有發(fā)生改變。同時，通過空間有限元分析，給出了縱向托梁承擔(dān)荷載的比例。
[關(guān)鍵詞] 底層大開間 框支墻梁 組合墻 擬動力試驗
Frame-wall beam is a critical member of composite masonry structure supported by frame shear wall with wide bay at bottom. The studies on the static and dynamic, behavior of frame-wall beam by pseudo-dynamic test show that all of the longitudinal and transverse walls have arc action. The load was transferred by space arc action, so the actual bearing load of wall beam supported by longitudinal beam decreased obviously in static load test. The bearing load increased in horizontal load test, but the action existed still obviously. Finally, the bearing load proportion of longitudinal beam was put forward by finite element analysis of building.
Keywords: wide bay at bottom; composite masonry structure; frame-wall beam; pseudo-dynamic
