1.湖南大学土木工程学院,湖南 长沙 410082
2.工程结构损伤诊断湖南省重点实验室(湖南大学),湖南 长沙 410082
汪君(1995—),男,硕士研究生。主要从事结构抗震研究。E-mail:wj9527@hnu.edu.cn
马高(1985—),男,副教授,博士。主要从事结构抗震、装配式结构等研究。E-mail:magao@hnu.edu.cn
收稿:2020-10-10,
修回:2020-12-14,
纸质出版:2024-12-15
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汪君,马高.预制ECC耗能墙⁃框架结构抗震性能分析与评价[J].防灾减灾工程学报,2024,44(06):1348-1358.
WANG Jun,MA Gao.Seismic Performance Analysis and Evaluation of Precast ECC Energy‑Dissipating Wall Frame Structures[J].Journal of Disaster Prevention and Mitigation Engineering,2024,44(06):1348-1358.
汪君,马高.预制ECC耗能墙⁃框架结构抗震性能分析与评价[J].防灾减灾工程学报,2024,44(06):1348-1358. DOI: 10.13409/j.cnki.jdpme.20201010001.
WANG Jun,MA Gao.Seismic Performance Analysis and Evaluation of Precast ECC Energy‑Dissipating Wall Frame Structures[J].Journal of Disaster Prevention and Mitigation Engineering,2024,44(06):1348-1358. DOI: 10.13409/j.cnki.jdpme.20201010001.
工程水泥基复合材料(Engineered Cementitious Composites,ECC)具有受拉应变硬化和多缝稳态开展的特性,可以作为一种理想的耗能材料,将ECC材料应用于预制墙板的塑性铰区形成一种新型预制ECC耗能墙板,并将其用于预制剪力墙⁃框架结构中。基于OpenSees仿真平台,采用多垂直杆单元构建预制ECC耗能墙板模型并进行参数分析,对某12层预制ECC耗能墙⁃框架结构进行静力弹塑性分析和动力时程分析,研究预制ECC耗能墙板对框剪结构抗震性能的影响。结果表明:预制ECC耗能墙板的极限承载力和耗能能力相较于普通预制剪力墙分别提高了35%和31%;静力弹塑性分析和易损性分析结果进一步验证了ECC材料对框剪结构抗震性能的改善作用;在近场脉冲型地震波作用下预制ECC耗能墙⁃框架结构抗震性能的改善效果最为明显,ECC适用于近断层结构的抗震应用;在造价上,预制ECC耗能墙⁃框架的成本相较于RC剪力墙⁃框架结构仅提高2.1%,因此配置ECC耗能墙是一种有效且经济的结构抗震性能提升方案。
Engineered cementitious composites (ECC) are cement-based composite materials that exhibit strain hardening under tension and the development of numerous fine cracks
making them ideal for energy dissipation. In this paper
ECC was utilized in the plastic hinge areas of precast walls panels
forming a new type of prefabricated ECC energy-dissipating wall panel
which was then used in prefabricated shear wall-frame structures. Using the OpenSees simulation platform
a precast ECC energy-dissipating wall panel model was built with the multiple vertical line element for parameter analysis. Static elastoplastic and dynamic time-history analysis was conducted on a 12-story precast ECC energy-dissipating wall-frame structure to investigate the influence of the ECC energy-dissipating wall panels on the seismic performance of the frame-shear wall structures. The results showed that the ultimate bearing capacity and energy dissipation capacity of the precast ECC energy-dissipating wall panel were improved by 35% and 31%
respectively
compared to ordinary precast shear walls. Static elastoplastic analysis and fragility analysis results further verified the role of ECC materials in improving the seismic performance of frame-shear wall structures. The seismic performance improvement under near-field pulse-type seismic waves was most significant
indicating that ECC was suitable for seismic applications in near-fault structures. The cost of the precast ECC energy-dissipating wall-frame structure was only 2.1% higher than that of the RC shear wall-frame structure
making the use of ECC energy-dissipating walls an effective and economical solution for improving structural seismic performance.
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