| 引用本文: | 王朋,尤学辉,黄杰,史庆轩,陶毅,王秋维.拼接成型UHPC免拆模板钢筋混凝土柱的抗震性能[J].哈尔滨工业大学学报,2024,56(1):103.DOI:10.11918/202208046 |
| WANG Peng,YOU Xuehui,HUANG Jie,SHI Qingxuan,TAO Yi,WANG Qiuwei.Seismic behavior of reinforced concrete column with an assembly stay-in-place UHPC formwork[J].Journal of Harbin Institute of Technology,2024,56(1):103.DOI:10.11918/202208046 |
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| 拼接成型UHPC免拆模板钢筋混凝土柱的抗震性能 |
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王朋1,2,3,尤学辉2,黄杰2,史庆轩1,2,3,陶毅1,2,3,王秋维1,2,3
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(1.西部绿色建筑国家重点实验室(西安建筑科技大学),西安 710055; 2.西安建筑科技大学 土木工程学院, 西安 710055; 3.结构工程与抗震教育部重点实验室(西安建筑科技大学),西安 710055)
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| 摘要: |
| 为研究超高性能混凝土（UHPC）免拆模板钢筋混凝土（URC）柱的抗震性能,选取UHPC免拆模板拼接方式和表面处理方式为试验设计参数,制作并完成了9个URC柱和1个钢筋混凝土（RC）柱的拟静力加载试验。模板拼接方式为螺栓加角钢连接、螺栓连接和环氧树脂砂浆连接；表面处理方式为光面处理、气泡膜印花处理和设肋处理,通过拟静力试验研究了模板拼接方式及表面处理方式对该类柱抗震性能的影响。此外,基于平截面假定,提出了URC柱的正截面偏压承载力计算式。结果表明:峰值荷载前,UHPC模板与核心混凝土黏结面无明显破坏,URC柱表现出良好的整体性,尤其是采用螺栓加角钢连接的URC柱,即使加载至极限位移时,也没有发生界面黏结失效破坏;与普通RC柱相比,URC柱的承载力提高了6.4%～43.3%,延性提高了11.4%～48.7%,耗能能力提高了27.7%～85.3%；三种连接方式中,采用螺栓加角钢连接的URC柱承载力最高,连接最可靠。最后,基于平截面假定提出的公式计算值与试验值吻合较好,可为工程应用提供参考。 |
| 关键词: 超高性能混凝土 免拆模板 钢筋混凝土柱 抗震性能 承载力计算 |
| DOI：10.11918/202208046 |
| 分类号:TU375 |
| 文献标识码:A |
| 基金项目:国家自然科学基金(9,5,51878543)；陕西省教育厅自然科学专项(21JK0733);陕西省教育厅协同创新中心项目(23JY040) |
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| Seismic behavior of reinforced concrete column with an assembly stay-in-place UHPC formwork |
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WANG Peng1,2,3,YOU Xuehui2,HUANG Jie2,SHI Qingxuan1,2,3,TAO Yi1,2,3,WANG Qiuwei1,2,3
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(1.State Key Lab of Green Building in Western China (Xi’an University of Architecture and Technology), Xi’an 710055, China; 2.School of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China; 3.Key Lab of Structural Engineering and Earthquake Resistance (Xi’an University of Architecture and Technology), Ministry of Education, Xi’an 710055, China)
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| Abstract: |
| To investigate the seismic behavior of reinforced concrete (RC) columns with stay-in-place ultra-high performance concrete (UHPC) formworks, named URC columns for short, we selected different assembly methods and surface treatment methods of UHPC formworks as design parameters and carried out pseudo-static tests on nine URC columns and one RC column. The assembly methods of UHPC formworks were boltangle steel connection, bolt connection, and epoxy resin mortar. The surface treatment methods of UHPC formworks were natural surface, bubble film printing, and adding ribs. The pseudo-static tests were conducted to study the influence of different assembly methods and surface treatment methods on the seismic behaviors of the URC columns. Additionally, on the basis of the assumption of plane section, a formula was proposed to predict the eccentric compressive bearing capacity of the URC columns. Results show that the bonding surface between UHPC formwork and concrete core had no apparent damage before the peak load, indicating that the URC columns have good integrity. In particular, the URC columns connected by boltangle steel had no interface bonding failure even under the failure load. Compared with the traditional RC column, the ultimate bearing capacity, ductility, and energy consumption of the URC columns were increased by 6.4%43.3%, 11.4%48.7%, and 27.7%85.3%, respectively. Among the three assembly methods, the URC columns connected by bolt and angle steel had the highest bearing capacity and the most reliable connection. Finally, the results calculated by the proposed formula were in good agreement with the test results, which can provide reference for practical application. |
| Key words: ultra-high performance concrete stay-in-place formwork reinforced concrete columns seismic performance calculation of bearing capacity |
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