钢梁加筋CFDST柱节点的抗震性能

IF 6.7 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Journal of building engineering Pub Date : 2025-06-14 DOI:10.1016/j.jobe.2025.113180

Xueyuan Yan, Jitao Yu, Shen Shi, Xinying Zheng, Jian Liu, Wenhui Chen

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引用次数: 0

摘要

双层钢管混凝土柱是一种具有广阔应用前景的组合结构。然而，其梁柱节点的抗震性能尚未得到充分的研究。本文提出了一种新型钢梁加筋CFDST柱节点，并通过拟静力试验对其抗震性能进行了评价。试验涉及钢梁-传统CFDST柱节点、钢梁-非穿透加筋CFDST柱节点和钢梁-穿透加筋CFDST柱节点三种节点类型。结果表明：加劲肋的加入显著提高了节点的承载力、延性、耗能能力和刚度。根据试验结果，建立了有限元模型，并对其精度进行了验证。利用有限元模型进行了进一步的参数化研究。研究发现，外钢管和加筋肋的屈服强度、轴压比和空心比对节点的抗震性能有显著影响。相比之下，钢贯通加劲CFDST柱节点在各种影响因素下表现出更稳定的性能。

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Seismic behavior of steel beam-stiffened CFDST column joints

Concrete-filled double-skin steel tube (CFDST) columns are a composite structure with broad application prospects. However, the seismic behavior of their beam-column joints has not been fully investigated. This paper presents a new type of steel beam-stiffened CFDST column joint and evaluates its seismic performance through quasi-static tests. The test involves three types of joints: steel beam-traditional CFDST column joint, steel beam-nonpenetrating stiffened CFDST column joint, and steel beam-penetrating stiffened CFDST column joint. The results indicate that the addition of stiffening ribs significantly enhances the bearing capacity, ductility, energy dissipation capability, and stiffness of the joint. Based on the test results, a finite element model is established and its accuracy is validated. Further parametric studies were conducted using the finite element model. The study finds that the yield strength of the outer steel tube and stiffening ribs, axial compression ratio, and hollow ratio have a notable effect on the seismic behavior of the joints. In contrast, the steel beam-penetrating stiffened CFDST column joint shows more stable performance under various influencing factors.

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来源期刊

Journal of building engineering Engineering-Civil and Structural Engineering

CiteScore

10.00

自引率

12.50%

发文量

1901

审稿时长

35 days

期刊介绍： The Journal of Building Engineering is an interdisciplinary journal that covers all aspects of science and technology concerned with the whole life cycle of the built environment; from the design phase through to construction, operation, performance, maintenance and its deterioration.