| 夹Φ20mm钢筋体复合锚杆原位锚固特性分析 |
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| 引用本文： | 张景科,谌文武,王旭东,孙满利,王 南,郭青林.夹Φ20mm钢筋体复合锚杆原位锚固特性分析[J].文物保护与考古科学,2015,27(1):39-45. |
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| 作者姓名： | 张景科 谌文武 王旭东 孙满利 王 南 郭青林 |
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| 作者单位： | 西部灾害与环境力学教育部重点实验 室,兰州大学土木工程与力学学院,甘肃兰州730000 ;国家古代壁画与土遗址保护工程技术研究中心,甘肃敦煌736200 ,西部灾害与环境力学教育部重点实验 室,兰州大学土木工程与力学学院,甘肃兰州730000 ;国家古代壁画与土遗址保护工程技术研究中心,甘肃敦煌736200 ,国家古代壁画与土遗址保护工程技术研究中心,甘肃敦煌736200 ,西北大学文化遗产学院,陕西西安10069,西部灾害与环境力学教育部重点实验 室,兰州大学土木工程与力学学院,甘肃兰州730000 ,国家古代壁画与土遗址保护工程技术研究中心,甘肃敦煌736200 |
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| 基金项目： | 国家青年自然科学基金资助(51108218),国家科技支撑计划资助(2013BAK08B11) |
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| 摘 要： | 加钢筋体复合锚杆在土遗址载体锚固得到了较为成功的应用,但该类型锚杆的机理研究还是空白。为此,选择交河故城开展夹Φ20mm钢筋体复合锚杆现场锚固测试,包括锚固性能测试和锚杆各界面层应变监测。试验结果表明:1)3m长复合锚杆极限锚固力可达150kN,杆体表现出较强塑性变形。2)钢筋-复合材料界面层轴向应变远大于其他界面层,锚固失效在该层。3)由于杆体的非均直性,楠竹-复合材料界面表现出轴向应变的非规律性,局部出现受压状态。4)楠竹-浆体界面层与楠竹-复合材料界面层在较高荷载下出现剪应变向锚固末端的传递特征。5)鉴于杆体的多圈层构造,受力过程中出现明显的横向传递和剪胀特征。
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| 关 键 词： | 加钢筋复合锚杆 极限锚固力 界面剪应变 荷载传递 多圈层构造 |
Analysis of the field anchoring characteristics of composite bolts containing steel bars (20mm diameter) |
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| ZHANG Jingke,CHEN Wenwu,WANG Xudong,SUN Manli,WANG Nan and GUO Qinglin.Analysis of the field anchoring characteristics of composite bolts containing steel bars (20mm diameter)[J].Sciences of Conservation and Archaeology,2015,27(1):39-45. |
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| Authors: | ZHANG Jingke CHEN Wenwu WANG Xudong SUN Manli WANG Nan and GUO Qinglin |
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| Institution: | Key Laboratory of Mechanics on Environment and Disaster in Western China, School of Civil Engineering and Mechanics, Lanzhou University, Lanzhou 730000, China;National Research Center for Conservation of Ancient Wall Paintings,Dunhuang 73620,China,Key Laboratory of Mechanics on Environment and Disaster in Western China, School of Civil Engineering and Mechanics, Lanzhou University, Lanzhou 730000, China;National Research Center for Conservation of Ancient Wall Paintings,Dunhuang 73620,China,Key Laboratory of Mechanics on Environment and Disaster in Western China, School of Civil Engineering and Mechanics, Lanzhou University, Lanzhou 730000, China,School of Cultural Heritage, Northwest University, Shanxi 710069,China,Key Laboratory of Mechanics on Environment and Disaster in Western China, School of Civil Engineering and Mechanics, Lanzhou University, Lanzhou 730000, China and National Research Center for Conservation of Ancient Wall Paintings,Dunhuang 73620,China |
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| Abstract: | Composite bolts containing steel bars have been successfully applied for the anchorage of earthen sites. However, the mechanism of anchoring has not been studied yet. In the Jiaohe ruins (a typical earthen site), composite bolts containing 20mm diameter steel bars were chosen for pullout experiments and to monitor the interface strain along the bolt. The experimental results indicate:1) the maximum anchoring force of a 3m long bolt is over 150kN, and the bolt shows strong plastic deformation; 2) at the damage interface, the axial strain of the interface between steel and composite material is greater than at others; 3) due to the heterogeneity of the bolt, the irregularity of the axial strain occurs at the interface between bamboo and composite materials, which creates some local compression phenomena; 4) the change of shear strain along the bamboogrout interface and the bamboocomposite material interface coincides with that of the pullout load, and shear strain is transferred to the end of the bolt under higher loads; 5) because of the multilayer structure of the bolt, transverse transfer and shearing expansion appear distinctly during the pullout experiment. |
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| Keywords: | Composite bolt containing the steel bar Maximum anchoring force Interface shear strain Load transfer Multilayer structure |
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