| 引用本文: | 鲁军凯,师韬,邵盼盼,张宁,姜禹彤,许国山.分段装配式防屈曲支撑螺栓连接方法研究[J].哈尔滨工业大学学报,2025,57(5):140.DOI:10.11918/202402002 |
| LU Junkai,SHI Tao,SHAO Panpan,ZHANG Ning,JIANG Yutong,XU Guoshan.Study on bolted connection method for segmental assembled buckling-restrained braces[J].Journal of Harbin Institute of Technology,2025,57(5):140.DOI:10.11918/202402002 |
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| 分段装配式防屈曲支撑螺栓连接方法研究 |
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鲁军凯1,师韬1,邵盼盼1,张宁1,姜禹彤2,许国山2
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(1.东北林业大学 土木与交通学院,哈尔滨 150040;2.哈尔滨工业大学 土木工程学院,哈尔滨 150090)
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| 摘要: |
| 装配式防屈曲支撑具有便于拆卸、加工精度易于控制、自重较轻等优点。但传统装配式防屈曲支撑通常无法在震后快速完成损伤检测,且需要对支撑进行整体拆装更换发生局部损伤的元件。为此,提出一种分段装配式防屈曲支撑（SA-BRB）,其具有震后便于视检、局部更换损伤部件等优点。通过简化的SA-BRB螺栓连接等效梁模型确定内芯接触力、螺栓撬力以及螺栓轴力三者间关系,提出SA-BRB螺栓连接方法,并结合有限元模拟结果拟合确定SA-BRB螺栓轴力计算公式。结果表明:槽钢翼缘的高度及厚度、槽钢腹板厚度、盖板及垫板的宽度、内芯宽度及螺栓间距等对螺栓撬力系数影响较大；相比中部螺栓连接,相关参数对端部螺栓连接撬力放大作用更为明显,设计时建议考虑1.1倍螺栓轴力放大系数,螺栓纵向间距宜为100~200 mm。建议的螺栓连接设计方法可较好地预测SA-BRB螺栓连接失效模式,为防屈曲支撑相关研究及设计方法提供理论参考。 |
| 关键词: 装配式防屈曲支撑 分段约束 螺栓连接 撬力 |
| DOI：10.11918/202402002 |
| 分类号:TU391 |
| 文献标识码:A |
| 基金项目:国家自然科学基金(8,0);黑龙江省自然科学基金(LH2022E005) |
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| Study on bolted connection method for segmental assembled buckling-restrained braces |
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LU Junkai1,SHI Tao1,SHAO Panpan1,ZHANG Ning1,JIANG Yutong2,XU Guoshan2
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(1.School of Civil Engineeringand Transportation, Northeast Forestry University, Harbin 150040, China; 2.School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China)
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| Abstract: |
| Assembled buckling-restrained braces have advantages of easy disassembly, precise manufacturability, and light weight. However, conventional buckling-restrained braces often face challenges in conducting rapid post-earthquake damage assessment and typically require integral disassembly to replace localized damaged components. A segmental assembled buckling-restrained brace (SA-BRB) is proposed to address this issue, which facilitates post-earthquake visual inspection and localized replacement of damaged components after an earthquake. By establishing a simplified equivalent beam model of SA-BRB bolted connection, the relationships among the steel core contact force, bolt prying force, and bolt axial force are determined. Additionally, a bolted connection method for SA-BRBs is proposed, and the axial force calculation formula for the SA-BRB bolts is fitted and determined based on finite element simulation results. The results indicate that key parameters such as channel steel flange height, thicknesses of channel steel flange and web, the widths of cover plates, shim plate and inner core, and bolt spacing significantly influence the bolt prying force coefficient. These parameters, compared to the midspan bolted connections, exhibit a greater amplifying effect on the prying force in end bolt-connections. It is recommended to consider a bolt axial force amplification factor of 1.1 in the design, with a longitudinal bolt spacing of 100-200 mm. The proposed design method effectively predicts the failure modes of SA-BRB bolted connections and provides theoretical references for research and design methodologies related to buckling-resistant braces. |
| Key words: assembled buckling-restrained brace segmentally restraining bolted connection prying force |
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