- 摘 要
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(1 北京科技大學(xué)土木與資源工程學(xué)院， 北京 100083；2 強震區(qū)軌道交通工程抗震研究北京市國際科技合作基地， 北京 100083)
［摘要］我國農(nóng)村地區(qū)目前仍現(xiàn)存大量的磚木結(jié)構(gòu)。北京地區(qū)的老舊農(nóng)宅大多為雙坡屋頂單層建筑，后縱墻為實墻，前縱墻門窗洞口過大，結(jié)構(gòu)砂漿強度低，并且缺乏圈梁與構(gòu)造柱等基本抗震構(gòu)造措施，當(dāng)有大震作用時，房屋易發(fā)生整體倒塌。針對上述北京地區(qū)既有農(nóng)宅的結(jié)構(gòu)特點，提出了以內(nèi)鋼框架加固為主、鋼板帶加固為輔的加固技術(shù)。并以一個兩開間坡屋頂單層磚木結(jié)構(gòu)農(nóng)宅為研究對象，建立連續(xù)體有限元模型，進行模態(tài)分析、彈塑性時程分析與拉伸損傷分析，探究其加固前后的抗震性能變化。加固后結(jié)構(gòu)整體剛度增大，位移響應(yīng)減小，墻體的損傷程度明顯減輕。最后制作了內(nèi)鋼框架與鋼板帶組合加固后的1/4相似比振動臺模型，進行了振動臺試驗，驗證了加固方式的可行性與有效性。
［關(guān)鍵詞］磚木結(jié)構(gòu)；內(nèi)鋼框架；抗震加固；縮尺模型
中圖分類號：TU362 文獻標識碼：A文章編號：1002-848X(2021)13-0119-07
Study on reinforcement method and seismic performance of farm house with brick-wood structure reinforced by inner steel frame
SONG Bo1,2, CHENG Yuzhen1,2, WANG Shuo1,2
(1 College of Civil Engineering and Resources Engineering, University of Science and Technology Beijing, Beijing 100083， China；2 Beijing International Cooperation Base for Science and Technology-Aseismic Research of the Rail Transit Engineering in the Strong Motion Area, Beijing 100083， China)
Abstract: At present, there are still a large number of brick-wood structure in rural areas of China. Most of the old farm houses built in Beijing are single-storey buildings with sloping roofs, the rear longitudinal walls are solid walls. Portals and window openings of the front longitudinal walls are too large. The structural mortar strength is low, and there is lack of basic seismic structural measures such as ring beams and structural columns. When there is a large earthquake, the house is very easy to collapse as a whole. In view of the structural characteristics of the existing farm houses in Beijing in the above-mentioned, the strengthening technology of steel frame as the main part and steel strip as the auxiliary part was put forward. Taking the single-storey farm house with two-bay sloping roof as the research object, the continuum finite element model was established, and the modal analysis, elastic-plastic time history analysis and tensile damage analysis were carried out to explore the seismic performance changes before and after reinforcement. After reinforcement, the overall rigidity of the structure increases, the displacement response decreases, and the damage degree of the wall was significantly reduced. A 1/4 similar ratio shaking table model reinforced by internal steel frame and steel plate belt was made, and the shaking table test was carried out, which verifies the feasibility and effectiveness of the reinforcement method.
Keywords:brick-masonry structure； internal steel frame； seismic reinforcement； scale model
*國家重點研發(fā)計劃項目（2017YFF0205003）。
作者簡介：宋波，博士，教授，博士生導(dǎo)師，Email:chengyuzhen918704@163.com。
