Min Fan, Hongchao Guo, Shen Li, Zhenshan Wang, Huaqiang Wang
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引用次数: 0
Abstract
H-steel all-bolted connection steel frame structures with heat preservation and decoration composite wall boards were investigated and the seismic performances of three scaled specimens were studied. The failure modes, hysteresis curves, bearing capacity, ductility, energy dissipation capacity, stiffness degradation and strain distribution were discussed. The calculation method of structural theoretical internal force was presented. The results showed that the overall structural seismic performance was better, and the structural ductility met the demands of elastic-plastic inter-story drift angle for seismic design. The H-steel weak-axis connection structure obtained better energy dissipation capacity, and its bearing capacity and stiffness were slightly different from the strong-axis connection. The heat preservation and decoration performance of composite wallboard and the all-bolted connection of the steel frame realized prefabrication during the whole construction period. The plastic hinge of the steel beam can be moved outwards because of the L-angles, which effectively avoids stress concentration in joint areas and expands the plastic hinge range. The errors between the theoretical structural capacity calculated by the plastic analysis method and the test results were within 2.44%. In addition, structural failure mechanisms and bearing capacities were verified by the finite element (FE) analysis, and the effects of the main parameters on the structures were investigated. The FE verification results were the same as in the test. The research results provide theoretical support and technical guidance for the application of thermal insulation and decorative composite wall panels in H-shaped steel all-bolted steel frames.
研究了带有保温装饰复合墙板的 H 型钢全螺栓连接钢框架结构，并对三个按比例制作的试件进行了抗震性能研究。讨论了破坏模式、滞后曲线、承载力、延性、耗能能力、刚度退化和应变分布。还介绍了结构理论内力的计算方法。结果表明，该结构整体抗震性能较好，结构延性满足抗震设计中弹性塑性层间漂移角的要求。H 型钢弱轴连接结构获得了较好的消能能力，其承载力和刚度与强轴连接结构略有不同。复合墙板的保温和装饰性能与钢框架的全螺栓连接实现了全工期预制。钢梁的塑性铰由于采用了 L 型角，可以向外移动，有效避免了连接部位的应力集中，扩大了塑性铰的范围。塑性分析方法计算出的结构理论承载力与试验结果的误差在 2.44% 以内。此外，还通过有限元（FE）分析验证了结构失效机理和承载能力，并研究了主要参数对结构的影响。有限元分析验证结果与试验结果一致。研究成果为保温装饰复合墙板在 H 型钢全螺栓钢框架中的应用提供了理论支持和技术指导。
期刊介绍：
Earthquake Engineering and Engineering Vibration is an international journal sponsored by the Institute of Engineering Mechanics (IEM), China Earthquake Administration in cooperation with the Multidisciplinary Center for Earthquake Engineering Research (MCEER), and State University of New York at Buffalo. It promotes scientific exchange between Chinese and foreign scientists and engineers, to improve the theory and practice of earthquake hazards mitigation, preparedness, and recovery.
The journal focuses on earthquake engineering in all aspects, including seismology, tsunamis, ground motion characteristics, soil and foundation dynamics, wave propagation, probabilistic and deterministic methods of dynamic analysis, behavior of structures, and methods for earthquake resistant design and retrofit of structures that are germane to practicing engineers. It includes seismic code requirements, as well as supplemental energy dissipation, base isolation, and structural control.
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