| 建筑结构的屈曲约束支撑对其抗震加固性能的影响 |
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| 引用本文： | 冯冲冲,朱南海,贺小玲. 建筑结构的屈曲约束支撑对其抗震加固性能的影响[J]. 地震工程学报, 2019, 41(2): 353-359 |
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| 作者姓名： | 冯冲冲 朱南海 贺小玲 |
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| 作者单位： | 江西理工大学建筑与测绘工程学院, 江西 赣州 341000,江西理工大学建筑与测绘工程学院, 江西 赣州 341000,江西理工大学建筑与测绘工程学院, 江西 赣州 341000 |
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| 基金项目： | 国家自然科学基金项目（51408276、51768024）；江西省自然科学基金项目（20151BAB216023、20181BAB206039）；江西省教育厅科技项目（GJJ160618）；国家级大学生创新创业训练计划项目（201710407019、201710407014） |
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| 摘 要： | 当前方法采用伸臂桁架加固建筑结构时,未考虑建筑结构的屈曲约束支撑力的影响,伸臂桁架与建筑结构的连接不牢固,导致其对建筑结构的抗震加固性能较差。故此,深入分析建筑结构的屈曲约束支撑对其抗震加固性能的影响,设计建筑结构抗震加固方案,利用高强螺栓节点经由连接钢板实现屈曲约束支撑与建筑结构的铰接固定。分别从支撑变形同建筑结构层间位移的关系、建筑结构支撑承载力、多遇地震影响下屈曲约束支撑框架的位移验算,以及罕遇地震影响下屈曲约束支撑的弹塑性位移验算方面,分析屈曲约束支撑对建筑结构抗震加固性能影响。经实验分析得出,建筑结构加入屈曲约束支撑后第一扭转周期同第一平动周期的比值降低0.14,X、Y两个方向的砌体墙同建筑结构的刚度比值降低6.9、8.0,最大顶点位移值降低15.4 mm、29.3 mm,抗震加固性能大大提高。
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| 关 键 词： | 建筑结构 屈曲约束支撑 抗震 加固 位移 承载力 |
| 收稿时间： | 2018-09-19 |
Influence of Buckling-Restrained Braces on the SeismicStrengthening Performance of Building Structures |
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| FENG Chongchong,ZHU Nanhai and HE Xiaoling. Influence of Buckling-Restrained Braces on the SeismicStrengthening Performance of Building Structures[J]. China Earthguake Engineering Journal, 2019, 41(2): 353-359 |
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| Authors: | FENG Chongchong ZHU Nanhai HE Xiaoling |
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| Affiliation: | School of Architectural and Surveying & Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China,School of Architectural and Surveying & Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China and School of Architectural and Surveying & Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China |
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| Abstract: | The influence of buckling-restrained braces on building structure is not considered in the current methods of structural reinforcement with outriggers. The connection between the outrigger and the building structure is unstable, thus leading to poor seismic strengthening performance of the structure. Therefore, herein, the influence of buckling-restrained braces on the seismic strengthening performance of a building structure is analyzed in detail, and the seismic reinforcement scheme of the structure is designed. The buckling-restrained brace and the structure are fixed by the high-strength bolted joints through connecting steel plates. The influence of buckling-restrained braces on the seismic strengthening performance of a structure was studied. The study was based on the relationships among bracing deformation and story drift, bearing capacity, displacement-checking calculations of the buckling-restrained braced frame under frequent earthquakes, and the elasto-plastic displacement-checking calculation of the buckling-restrained brace under the influence of rare earthquakes. The experimental results showed that after adding a buckling-restraint brace to the structure, the ratio of the first period of torsion to the first period of translation was decreased by 0.14; the stiffness ratio of the masonry wall to the building structure in the X and Y direction was decreased by 6.9 and 8.0, respectively, and the maximum vertex displacement was reduced by 15.4 mm and 29.3 mm, respectively. This indicated that the seismic reinforcement performance of the structure was greatly improved. |
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| Keywords: | building structure buckling-restrained brace seismic resistance reinforcement displacement bearing capacity |
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