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Seismic performance analysis of prefabricated assembled ECC energy dissipation wall-RC frame structure
Journal of Building Engineering ( IF 6.7 ) Pub Date : 2025-01-22 , DOI: 10.1016/j.jobe.2025.111860
Qian Weimin, Shi Qingxuan, Long Miao-miao, Yang Penghui, Xin Li, Wang Bin, Liu Yuan
Journal of Building Engineering ( IF 6.7 ) Pub Date : 2025-01-22 , DOI: 10.1016/j.jobe.2025.111860
Qian Weimin, Shi Qingxuan, Long Miao-miao, Yang Penghui, Xin Li, Wang Bin, Liu Yuan
Engineered cementitious composites (ECC), known for their strain-hardening behavior and multi-cracking characteristics, were ideal materials for energy dissipation. An energy dissipation wall (EDW) constructed from ECC materials and assembled into reinforced concrete (RC) frame structures formed a novel type of prefabricated ECC-EDW-RC frame structure. In this study, ECC-EDW-RC frame specimens were designed, and the damage modes, hysteretic behavior, load-bearing capacity, and stiffness degradation were analyzed through low-cycle reciprocating loading tests, considering various influencing factors. Based on these findings, a refined finite element model for the prefabricated assembled ECC-EDW-RC frame was developed and validated the test results. The research demonstrated that the ECC-EDW and RC frames exhibited excellent synergistic performance, significantly enhancing the bearing capacity, lateral stiffness, and energy dissipation capacity of the RC frame. Furthermore, when the inter-story displacement angle reached 5.2 % (for EDWF-1) and 4.9 % (for EDWF-2), the ECC-EDW could still resist substantial horizontal shear forces while maintaining its energy dissipation capacity. These results further clarified the internal force distribution within the prefabricated ECC-EDW-RC frame specimen.
中文翻译:
预制装配式ECC耗能墙-RC框架结构抗震性能分析
工程水泥基复合材料 (ECC) 以其应变硬化行为和多裂纹特性而闻名,是理想的能量耗散材料。由 ECC 材料构建并组装成钢筋混凝土 (RC) 框架结构的耗能墙 (EDW) 形成了一种新型的预制 ECC-EDW-RC 框架结构。本研究设计了 ECC-EDW-RC 框架试件,并通过低周往复加载试验分析了损伤模式、滞后行为、承载能力和刚度退化,考虑了各种影响因素。基于这些发现,开发了预制组装式 ECC-EDW-RC 框架的改进有限元模型,并验证了测试结果。研究表明,ECC-EDW 和 RC 框架表现出优异的协同性能,显著提高了 RC 框架的承载能力、横向刚度和耗能能力。此外,当层间位移角达到 5.2 %(EDWF-1)和 4.9 %(EDWF-2)时,ECC-EDW 仍能抵抗较大的水平剪切力,同时保持其耗能能力。这些结果进一步阐明了预制 ECC-EDW-RC 框架试件内的内力分布。
更新日期:2025-01-22
中文翻译:
预制装配式ECC耗能墙-RC框架结构抗震性能分析
工程水泥基复合材料 (ECC) 以其应变硬化行为和多裂纹特性而闻名,是理想的能量耗散材料。由 ECC 材料构建并组装成钢筋混凝土 (RC) 框架结构的耗能墙 (EDW) 形成了一种新型的预制 ECC-EDW-RC 框架结构。本研究设计了 ECC-EDW-RC 框架试件,并通过低周往复加载试验分析了损伤模式、滞后行为、承载能力和刚度退化,考虑了各种影响因素。基于这些发现,开发了预制组装式 ECC-EDW-RC 框架的改进有限元模型,并验证了测试结果。研究表明,ECC-EDW 和 RC 框架表现出优异的协同性能,显著提高了 RC 框架的承载能力、横向刚度和耗能能力。此外,当层间位移角达到 5.2 %(EDWF-1)和 4.9 %(EDWF-2)时,ECC-EDW 仍能抵抗较大的水平剪切力,同时保持其耗能能力。这些结果进一步阐明了预制 ECC-EDW-RC 框架试件内的内力分布。