超高性能混凝土(UHPC)包覆钢管混凝土柱单边螺栓连接节点受力机理和设计方法

苏亚森

doi:10.3724/j.gyjzG24030308

超高性能混凝土(UHPC)包覆钢管混凝土柱单边螺栓连接节点受力机理和设计方法

doi: 10.3724/j.gyjzG24030308

苏亚森

福建七建集团有限公司, 福建漳州 362000

详细信息

作者简介:
苏亚森,高级工程师,主要从事建筑施工、建设工程项目管理等方面研究。电子信箱:553176801@qq.Com

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出版历程
- 收稿日期: 2024-03-03
- 网络出版日期: 2024-12-05

Stress Mechanism and Design Method of UHPC-Encased CFST Column-to-Beam One-Side Bolted Joints

SU Yasen

Fujian Qijian Group Co., Ltd., Zhangzhou 362000, China

摘要

摘要: 单边螺栓连接技术有效解决了闭口截面柱难以应用全螺栓连接的难题,目前已有学者将单边螺栓连接技术用于钢管混凝土叠合柱-钢梁连接节点中,由于外部混凝土强度低,此类装配式连接节点表现出明显的柱壁破坏。提出采用UHPC包覆钢管混凝土叠合柱代替普通钢管混凝土叠合柱以避免采用单边螺栓连接节点时的柱壁失效,同时外部采用UHPC包覆可有效减少混凝土内的钢筋,便于单边螺栓的安装。基于ABAQUS有限元模型建立了UHPC包覆钢管混凝土叠合柱-钢梁连接节点的有限元模型,考虑了复杂材料本构以及节点域多接触的收敛问题,通过试验结果验证了模型的准确性,系统揭示了外部UHPC对内部钢管的约束作用,证明了此类节点可有效避免柱壁破坏。对典型的UHPC外包钢管混凝土叠合柱-钢梁装配式节点进行了参数分析。随后基于组件法,建立了节点弯矩承载力的设计方法,通过与有限元结果对比揭示了设计方法的准确性。研究结果表明,采用UHPC包覆钢管混凝土叠合柱-钢梁连接节点适合采用单边螺栓连接,并为此列连接节点提供了合理的设计方法。
- UHPC包覆钢管混凝土叠合柱 /
- 装配式节点 /
- 节点设计方法 /
- 受力机理
Abstract: One-side bolted connecting technique ensures the access of inside into the closed-section column, which has been used in the assembled joints between concrete encased CFST (CECFST) columns and steel beams. However, the bulge of steel tube and outer concrete were detected for one-side bolted normal CECFST column joints owing to the limited strength of outer concrete. Therefore, UHPC was adopted as outer concrete to replace the traditional outer concrete in CECFST columns, which aimed to avoid the steel tube from being failure effectively and to omit reinforcements in outer concrete for convenient installation in one-side bolted joints. A finite element model was established by ABAQUS considering the constitutive relations of complex materials and the convergence of multi-contact in joint region. The accuracy of the model was verified through test results, systematically revealing the restraining effect of outer concrete on interral steel tubes, and indicating that the UHPC could effectively restrict the bulge of steel tube. A parametric analysis were conducted on typical UHPC encased CFST composite columns one-side bolted to steel beam joints. Finally, the analytical models on the moment resistance were developed based on the component method. The comparison results declared that the proposed analytical method provided a reasonable prediction of the moment resistance. The research results in the paper validated that replacing normal concrete of CECFST by UHPC could avoid column failure when using one-side bolted joints and gave a proper design method for UHPC-encased CFST composite column one-side bolted to steel beam joints.
- UHPC-encased CFST composite column /
- assembled joint /
- design method for joints /
- stress mechanism

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参考文献(21)

[1]	ZHOU X G, HOU C, PENG J H, et al. Structural mechanism-based intelligent capacity prediction methods for concrete-encased CFST columns [J]. Journal of Constructional Steel Research, 2023, 202, 107769.
[2]	HOU C C, HAN L H, LIANG Z S, et al. Performance of concrete-encased CFST subjected to low-velocity impact: shear resistance analysis [J]. International Journal of Impact Engineering, 2021, 150, 103798.
[3]	张瑞, 陈建伟, 吴山, 等.套筒灌浆连接钢管混凝土叠合柱偏压性能试验研究[J].建筑结构学报, 2023, 44(增刊1):239-247.
[4]	李永进, 任庆新, 翁兴贵.火灾作用下钢管混凝土叠合柱偏压力学性能研究[J].华东交通大学学报, 2022, 39(6):10-17.
[5]	SHUAI S, HAN L H, HOU C. Concrete-encased CFST columns under combined compression and torsion: analytical behavior[J]. Journal of Constructional Steel Research, 2018, 144: 236-252.
[6]	LIAO F Y, HAN L H, TAO Z. Behavior of composite joints with concrete encased CFST columns under cyclic loading: experiments[J]. Engineering Structures, 2014, 59: 745-764.
[7]	LI W, XU L F, QIAN W W. Seismic performance of 3-D steel beam to concrete-encased CFST column joints: tests[J]. Engineering Structures, 2021, 232, 111793.
[8]	WANG W Q, WANG J F, GUO L. Behavior and analytical investigation of assembled connection between steel beam and concrete encased CFST column[J]. Structures, 2020, 24: 562-579.
[9]	GUO L, WANG J F, WANG W Q, et al. Experimental and numerical investigations of bolted assembled joints to concrete encased CFST columns with different connection details[J]. Journal of Constructional Steel Research, 2023, 201, 107739.
[10]	XIE K Z, HUANG K, HUANG L Z, et al. Experimental study of bond behavior between concrete-filled steel tube and UHPC-encased[J]. Construction and Building Materials, 2023, 409, 134016.
[11]	AYOUGH P, WANG Y H, ZENG W Y, et al. Numerical investigation and design of UHPC-encased CFST stub columns under axial compression[J]. Engineering Structures, 2024, 302, 117387.
[12]	CHEN H Y, LIAO F Y, YANG Y X, et al. Behavior of ultra-high-performance concrete (UHPC) encased concrete-filled steel tubular (CFST) stub columns under axial compression[J]. Journal of Constructional Steel Research, 2023, 202, 107795.
[13]	吴庆雄, 许志坤, 袁辉辉, 等.外包超高性能混凝土钢管混凝土叠合短柱轴压性能试验研究[J].建筑结构学报, 2023, 44(12):183-193.
[14]	吴庆雄, 许志坤, 袁辉辉, 等.外包UHPC钢管混凝土叠合短柱偏压性能研究[J/OL].工程力学, 2023, 40[2032-11-27 ].https://link.cnki.net/urlid/11.259503.20231124.1301.008.
[15]	HAN L H, ZHAO X L, TAO Z. Tests and mechanics model for concrete filled SHS stub columns, columns and beam-columns[J]. Steel and Composite Structures, 2001, 1 (1): 51-74.
[16]	YANG J, FANG Z. Research on stress-strain relation of ultra high performance concrete[J]. Concrete, 2008(7): 11-15.
[17]	张哲, 邵旭东, 李文光, 等.超高性能混凝土轴拉性能试验[J].中国公路学报, 2015, 28 (8): 50-58.
[18]	中华人民共和国住房和城乡建设部. 混凝土结构设计标准:GB/T 50010—2010[S]. 北京: 中国建筑工业出版社, 2024.
[19]	CEN. Eurocode 3: design of steel structures-part 1-8: design of joints: ENV 1993-1-8[S]. Brussels: CEN, 2005.
[20]	WANG J F, WANG J X, WANG H T. Seismic behavior of blind bolted CFST frames with semi-rigid connections[J]. Structures, 2017, 9: 91-104.
[21]	YANG Y F, HAN L H. Experiments on rectangular concrete-filled steel tubes loaded axially on a partially stressed cross-sectional area[J]. Journal of Constructional Steel Research, 2009, 65: 1617-1630.