钢套筒装配式预应力钢筋混凝土框架结构的抗震性能研究

IF 5.6 1区工程技术 Q1 ENGINEERING, CIVIL

Engineering Structures Pub Date : 2024-10-30 DOI:10.1016/j.engstruct.2024.119222

Jiaqi Liu, Dafu Cao, Kun Wang, Yanling Zhou, Hanyang Xue

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引用次数: 0

摘要

本文介绍了一种新型预应力装配式钢筋混凝土框架（PSFRC 框架）结构，它利用钢套筒进行装配。PSFRC 框架结合了预应力筋、加劲钢套筒和高强度螺栓，从而提高了承载能力和装配效率。为了评估 PSFRC 框架接头的抗震性能，对一个钢筋混凝土（RC）接头和两个 PSFRC 框架接头进行了循环荷载下的实验测试。此外，还使用有限元模型进行了滞后分析和弹塑性时程分析。实验结果表明，PSFRC 边缘连接的峰值荷载为 89.30 kN，而 PSFRC 中间连接的承载力为 169.95 kN，比现浇试样 XJ 的承载力（107.87 kN）高出 58.87%。PSFRC 接头的滞后曲线显示出明显的饱满度，与 RC 接头相比，PSFRC 接头的等效阻尼系数提高了 11.56%。此外，还提出了一种使用 ABAQUS 软件的模拟方法，以研究 PSFRC 框架整体结构的地震响应。建立了 PSFRC 和 RC 框架的有限元模型，并分析了它们在循环荷载和厄尔尼诺中心地震波下的抗震性能。考虑了各种参数，包括峰值承载力、刚度退化、峰值加速度值、层间漂移比和混凝土破坏值。有限元分析结果显示，PSFRC 框架的承载能力（435.33 千牛）比 RC 框架（386.48 千牛）高出约 30%。此外，在 600 gal 的峰值加速度下，PSFRC 框架首层的最大层间漂移比为 1/58，低于 1/50 的极限值。PSFRC 框架梁端塑性铰链位置距离核心区较远，符合抗震设计目标。这项研究为建筑结构设计和抗震性能分析方法提供了宝贵的见解。

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Study on seismic performance of prestressed fabricated reinforced concrete frame structure assembled by steel sleeves

This paper introduces a novel type of prestressed fabricated reinforced concrete frame (PSFRC frame) structure, which utilizes steel sleeves for assembly. The PSFRC frame incorporates prestressed tendons, stiffened steel sleeves, and high-strength bolts, resulting in improved bearing capacity and assembly efficiency. To assess the seismic performance of the PSFRC frame joint, experimental tests were conducted on one reinforced concrete (RC) joint and two PSFRC frame joints under cyclic loading. Hysteresis analysis and elastic-plastic time-history analysis were also performed using a finite element model. The experimental results showed that the PSFRC edge joint reached a peak load of 89.30 kN, while the PSFRC middle joint exhibited a capacity of 169.95 kN, which was 58.87 % higher than that of the cast-in-place specimen XJ (107.87 kN). The hysteresis curves of the PSFRC joints demonstrated significant fullness, with the equivalent damping coefficient of the PSFRC joint being increased by 11.56 % compared to the RC joint. Additionally, a simulation method using ABAQUS software was proposed to investigate the seismic response of the integral structure of the PSFRC frame. Finite element models for both PSFRC and RC frames were established, and their seismic performance was analyzed under cyclic loading and the El Centro seismic wave. Various parameters including peak loading capacity, stiffness degradation, peak acceleration value, inter-storey drift ratio, and concrete damage value were considered. The finite element analysis results revealed that the load-carrying capacity of the PSFRC frame (435.33 kN) was approximately 30 % higher than that of the RC frame (386.48 kN). Furthermore, at the peak acceleration of 600 gal, the maximum inter-storey drift ratio of the first floor for the PSFRC frame was 1/58, which was below the limit value of 1/50. The plastic hinge position at the beam end of the PSFRC frame was further from the core area, aligning with seismic design objectives. This research provides valuable insights into the design of fabricated building structures and methods for analyzing seismic performance.

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来源期刊

Engineering Structures 工程技术-工程：土木

CiteScore

10.20

自引率

14.50%

发文量

1385

审稿时长

67 days

期刊介绍： Engineering Structures provides a forum for a broad blend of scientific and technical papers to reflect the evolving needs of the structural engineering and structural mechanics communities. Particularly welcome are contributions dealing with applications of structural engineering and mechanics principles in all areas of technology. The journal aspires to a broad and integrated coverage of the effects of dynamic loadings and of the modelling techniques whereby the structural response to these loadings may be computed. The scope of Engineering Structures encompasses, but is not restricted to, the following areas: infrastructure engineering; earthquake engineering; structure-fluid-soil interaction; wind engineering; fire engineering; blast engineering; structural reliability/stability; life assessment/integrity; structural health monitoring; multi-hazard engineering; structural dynamics; optimization; expert systems; experimental modelling; performance-based design; multiscale analysis; value engineering. Topics of interest include: tall buildings; innovative structures; environmentally responsive structures; bridges; stadiums; commercial and public buildings; transmission towers; television and telecommunication masts; foldable structures; cooling towers; plates and shells; suspension structures; protective structures; smart structures; nuclear reactors; dams; pressure vessels; pipelines; tunnels. Engineering Structures also publishes review articles, short communications and discussions, book reviews, and a diary on international events related to any aspect of structural engineering.