Seismic performance and design method of novel InorgBam beam-column bolted connections utilizing glued-in rods in the column

IF 4.2 2区工程技术 Q2 ENGINEERING, GEOLOGICAL

Bulletin of Earthquake Engineering Pub Date : 2026-07-20 DOI:10.1007/s10518-026-02603-9

Shurong Li, Xin Zhang, Yepu Sheng

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引用次数: 0

Abstract

A novel type of inorganic-bonded bamboo composite (InorgBam) beam-column bolted connections with glued-in rods in the column (where the slots and the bolt holes are filled with adhesive) was proposed. To examine its failure mechanism and seismic performance, six beam-column connections with varying bolt and rod diameters were tested under cyclic loading. Key seismic parameters, including failure modes, bearing capacity, initial rotational stiffness, and energy dissipation capacity, were analyzed and compared. Three failure modes were identified, including bamboo splitting and bolt yielding (EYM II) in the beam, glued-in rod fracture in the column, and combined failure. The initial stiffness of the new beam-to-column joint was relatively high, ranging from 3957 to 4480 kN·m·rad^− 1, consistent with semi-rigid connection behavior. Specimens with EYM II and splitting failure showed higher ductility, with ductility coefficients 1.20–1.74 times greater than those of rod-fracture specimens, although their energy dissipation capacity was slightly reduced. Overall, connections undergoing EYM Ⅱ and splitting failure exhibited superior seismic performance. Furthermore, a calculation formula for the moment resistance based on different failure modes was established, and a recommended design ratio of 1.2 for the bolted-adhesive bearing capacity to glued-in rod bearing capacity was proposed to prevent rod fracture in the column and improve seismic safety.

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采用柱内粘接杆的新型InorgBam梁柱螺栓连接抗震性能及设计方法

提出了一种新型的无机粘结竹复合材料（InorgBam）梁柱螺栓连接，在柱中粘接杆（其中槽和螺栓孔用粘合剂填充）。为了研究其破坏机理和抗震性能，对6个不同螺栓和杆径的梁柱连接进行了循环荷载试验。分析和比较了主要抗震参数，包括破坏模式、承载力、初始转动刚度和耗能能力。确定了3种破坏模式，包括梁内竹节劈裂和锚杆屈服（EYM II）、柱内粘接杆断裂和复合破坏。新型梁柱节点初始刚度较高，为3957 ~ 4480 kN·m·rad−1，符合半刚性连接行为。劈裂破坏的延性系数为杆裂破坏的1.20 ~ 1.74倍，但耗能能力略有降低。总体而言，经历EYMⅡ和劈裂破坏的连接具有较好的抗震性能。建立了基于不同破坏模式的弯矩抗力计算公式，提出了栓接承载力与粘接杆承载力的推荐设计比为1.2，以防止柱内杆断裂，提高抗震安全性。

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来源期刊

Bulletin of Earthquake Engineering 工程技术-地球科学综合

CiteScore

8.90

自引率

19.60%

发文量

263

审稿时长

7.5 months

期刊介绍： Bulletin of Earthquake Engineering presents original, peer-reviewed papers on research related to the broad spectrum of earthquake engineering. The journal offers a forum for presentation and discussion of such matters as European damaging earthquakes, new developments in earthquake regulations, and national policies applied after major seismic events, including strengthening of existing buildings. Coverage includes seismic hazard studies and methods for mitigation of risk; earthquake source mechanism and strong motion characterization and their use for engineering applications; geological and geotechnical site conditions under earthquake excitations; cyclic behavior of soils; analysis and design of earth structures and foundations under seismic conditions; zonation and microzonation methodologies; earthquake scenarios and vulnerability assessments; earthquake codes and improvements, and much more. This is the Official Publication of the European Association for Earthquake Engineering.