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目的:通过双矩管装配式防屈曲支撑的滞回试验研究,探讨防屈曲支撑可能存在的破坏模式及各设计参数对支撑耗能性能的影响,验证支撑端部构造细节的合理性,提出支撑设计建议。创新点:1.试验研究铰接双矩管装配式防屈曲支撑的滞回性能;2.获得4种支撑破坏模式。方法:通过对7根铰接双矩管装配式防屈曲支撑的滞回性能试验,研究支撑外围盖板厚度、内核加强翼板高度和外围槽钢翼缘高度等参数对防屈曲支撑破坏机理及耗能性能的影响。结论:1.外围盖板厚度太薄,支撑易发生端部折曲破坏;2.端部转动受限制的支撑,其滞回性能优于纯铰接防屈曲支撑,但支撑连接节点处的附加弯矩不容忽视;3.支撑均表现出优良的屈曲耗能性能,验证了试验试件端部构造细节的合理性。
OBJECTIVE: To investigate the possible damage modes of buckling restraint and the influence of each design parameter on the energy dissipation performance of the buckling restraint by means of the hysteretic test of the double-tube assembly-type buckling restraint, to verify the rationality of the structural details of the restraint ends and to propose the support Design advice. Innovations: 1. Experimental study of hysteretic behavior of hinged double-tube-mounted buckling brace; 2. Four support failure modes were obtained. Methods: The hysteretic behavior of seven hinged double-tube-mounted buckling braces was studied. The failure mechanism and the wear resistance of buckling brace were studied with parameters such as the thickness of the supporting outer cover, the height of the inner flange and the height of the outer channel flange. The impact of performance. Conclusions: 1. The thickness of the outer cover is too thin, and the end buckling damage easily occurs in the support; 2. The hysteretic behavior of the restrained support with end rotation is better than pure hinged buckling support, The moment can not be ignored; 3. The support shows excellent buckling energy dissipation performance, verifying the rationality of the end construction details of the test specimen.