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（大連民族大學(xué)土木工程學(xué)院， 大連 116605）

［摘要］以甘堡藏寨194號(hào)楊家宅院為建筑原型，根據(jù)相似比理論設(shè)計(jì)了甘堡藏寨194號(hào)楊家宅院地震模擬振動(dòng)臺(tái)試驗(yàn)縮尺模型，采用當(dāng)?shù)氐氖?、砂漿，并請(qǐng)當(dāng)?shù)毓そ尺M(jìn)行了模型砌筑，選取El Centro位移波作為地震動(dòng)輸入，調(diào)整位移波峰值模擬地震強(qiáng)度，給出了2層和3層處樓面加速度和位移沿高度的變化規(guī)律，進(jìn)行了裂縫分析，結(jié)果表明：藏寨砌筑砂漿強(qiáng)度較低、縱橫墻拉結(jié)處較弱，同時(shí)洞口為薄弱部位，且第2~3層豎向體型收進(jìn)，剛度和承載力突變，進(jìn)而形成“V”字形剪切斜裂縫；結(jié)構(gòu)具有不對(duì)稱的扭轉(zhuǎn)效應(yīng)，導(dǎo)致同一層的加速度和位移峰值相差10%左右；沿房屋豎向質(zhì)量和剛度有突變，形成薄弱層，導(dǎo)致墻體在地震作用下有外閃的趨勢(shì)，容易發(fā)生破壞。建議對(duì)房屋的縱橫墻加強(qiáng)拉結(jié)，同時(shí)對(duì)薄弱部位應(yīng)進(jìn)行加固改造。

［關(guān)鍵詞］藏寨； 石砌體； 地震模擬振動(dòng)臺(tái)試驗(yàn)； 地震作用； 薄弱層

中圖分類號(hào)：TU317， TU526文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2018)01-0042-04

Experimental study on earthquake-simulated shaking table test of Tibetan village of No.194 Yang′ fort in Ganbao

Cui Lifu, Sun Jiangang, Wang Zhen, Liu Weibing, Li Xiang

(College of Architecture and Civil Engineering, Dalian Nationalities University, Dalian 116605, China)

Abstract:Taking Tibetan village of No.194 Yang′ fort in Ganbao as building prototype, the similarity ratio theory was used to design the scale model of the shaking table test for simulating earthquake. The model was modeled by the local artisans use local stone and mortar. The El Centro displacement wave was selected as the input of ground motion and the peak value of displacement wave was adjusted to simulate earthquake intensity. The law of acceleration and displacement along height for two floors and three floors was given. The crack analysis was carried out. The results show that the strength of masonry mortar for Tibetan village is low, and the connection of longitudinal and transverse walls are weakened, while the holes are weak. And there is vertical shape set back from second floor to third floor, to lead to abrupt change in stiffness and bearing capacity, forming of V-shaped shear diagonal cracks. The structure has an asymmetric torsional effect, resulting in about 10% difference in the peak values of the acceleration and displacement of the same layer. There is a sudden change in vertical mass and stiffness along the height of the house to form a weak layer, which leads to the tendency of the outward displacement of the wall under the earthquake and is prone to damage. It is suggested that the longitudinal and transverse walls of houses should be strengthened and the weakest parts should be reinforced and transformed.

Keywords:Tibetan village; stone masonry; earthquake-simulated  shaking table test; seismic action; weak layer

*中央財(cái)政自主基金項(xiàng)目（DC201501040101）。

通訊作者：孫建剛，博士，教授，Email:sjg728@163.com。