| 免拆超高性能混凝土模板钢筋混凝土柱抗震性能研究 |
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| 引用本文： | 梁兴文,史纪从,于婧,李林.免拆超高性能混凝土模板钢筋混凝土柱抗震性能研究[J].西北地震学报,2020,42(3):579-588,606. |
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| 作者姓名： | 梁兴文 史纪从 于婧 李林 |
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| 作者单位： | 西安建筑科技大学 土木工程学院, 陕西 西安 710055;陕西建研结构工程股份有限公司, 陕西 西安 710082 |
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| 基金项目： | 国家自然科学基金项目（51278402） |
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| 摘 要： | 为研究预制超高性能混凝土(UHPC)模板钢筋混凝土(RC)柱的抗震性能,并验证预制UHPC模板在往复荷载作用下是否发生剥离,考虑轴压比、剪跨比、箍筋间距和保护层厚度,设计制作6根免拆模板柱(PTC)和1根RC对比柱试件,对其进行拟静力试验,研究其破坏形态、滞回性能、变形和耗能能力以及强度和刚度退化规律等。结果表明,与加载方向垂直的预制UHPC模板大约在PTC试件峰值荷载的70%时发生剥离,与加载方向平行的预制UHPC模板在试件最终破坏时剥离;在剪跨比、轴压比和箍筋数量均分别相同的条件下,由UHPC模板加10 mm混凝土作为保护层的试件,其抗震性能相对较好,但其承载力和前期刚度略有减小。
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| 关 键 词： | 超高性能混凝土 免拆模板柱 剪跨比 滞回性能 抗震性能 |
| 收稿时间： | 2020/1/20 0:00:00 |
Seismic Behavior of Reinforced Concrete Columns with PermanentTemplate of Ultra-High-Performance Concrete |
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| LIANG Xingwen,SHI Jicong,YU Jing,LI Lin.Seismic Behavior of Reinforced Concrete Columns with PermanentTemplate of Ultra-High-Performance Concrete[J].Northwestern Seismological Journal,2020,42(3):579-588,606. |
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| Authors: | LIANG Xingwen SHI Jicong YU Jing LI Lin |
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| Institution: | College of Civil Engineering, Xi''an University of Architecture and Technology, Xi''an 710055, Shaanxi, China; Shaanxi Jianyan Structural Engineering Co., Ltd., Xi''an 710082, Shaanxi, China |
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| Abstract: | To examine the seismic behavior of reinforced concrete (RC) columns with prefabricated ultra-high-performance concrete (UHPC) permanent templates and check whether the prefabricated permanent templates are stripped from the surface of the specimen under low-cyclic repeated loading. Pseudo-static tests were conducted for the comparative purpose of six permanent template columns (PTC) and one RC column with varying axial load ratio, shear span ratio, stirrup spacing, and concrete cover. The failure pattern, hysteretic characteristics, deformation capacity, energy dissipation capacity, and stiffness degradation of permanent template columns were studied. Test results showed that the permanent templates that were perpendicular to the direction of loading stripped at about 70% of the peak load; the permanent templates that were stripped at the final destruction of the specimen parallel to the direction of loading. Within the same shear span ratio, axial load ratio, and several stirrups, the seismic behavior of the specimen with the UHPC template and 10 mm concrete as the cover is relatively better than others, but its bearing capacity and prophase stiffness are slightly reduced. |
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| Keywords: | ultra-high-performance concrete permanent template column shear span ratio hysteretic performance seismic performance |
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