The invention discloses a double-core multi-steel pipe all-steel buckling-proof brace with double yield points, good seismic energy dissipation capacity and high bearing capacity, which can meet the support bearing capacity requirements of high-rise and long-span buildings under earthquake action. The technical scheme includes inner core pipe fittings and outer core pipe fittings, inner core pipe fittings are made of low yield point steel, and outer core pipe fittings are made of low yield point steel. Core pipe fittings are made of high yield point steel. The inner core pipe fittings are sleeved inside the outer core pipe fittings, and there is a set gap between the inner core pipe fittings and the outer core pipe fittings; both ends of the inner core pipe fittings and the outer core pipe fittings are fixed at the end connecting plate; the inner core pipe fittings are sleeved with an inner restraint sleeve, one end of the inner restraint sleeve is fixed with one end of the two end connecting plates, and the other end of the inner restraint sleeve is suspended. The outer sleeve of the core pipe fittings is provided with an outer restraint sleeve, one end of the outer restraint sleeve is fixed with the other end connecting plates, and the other end of the outer restraint sleeve is suspended.
【技术实现步骤摘要】
一种具有双屈服点的双芯材多重钢管全钢防屈曲支撑
本专利技术涉及建筑工程
,涉及一种新型的减震耗能支撑构件,特别是涉及一种具有双屈服点的双芯材多重钢管全钢防屈曲支撑。
技术介绍
框架-支撑体系作为一种延性良好的结构体系常用于抗震结构中,采用支撑的结构体系在建筑结构中应用十分广泛。普通支撑受压会产生屈曲现象,当支撑受压屈曲后,刚度和承载力急剧降低。在地震作用下,支撑的内力在受压和受拉两种状态下往复变化。当支撑由压曲状态逐渐变至受拉状态时,支撑的内力以及刚度接近为零。因而普通支撑在反复荷载作用下滞回性能较差。为解决普通支撑受压屈曲以及滞回性能差的问题,在支撑外部设置套管,约束支撑的受压屈曲,构成防屈曲支撑。防屈曲支撑横向通常由三部分组成,包括核心耗能芯材、侧向支撑约束构件和无粘结材料。传统防屈曲支撑其耗能芯材通常为单芯材,无粘结材料通常为混凝土或砂浆。在地震作用下,荷载完全由单个芯材承担,侧向约束构件和无粘结材料约束芯材防止其在受压时发生屈曲,以保证芯材在受拉和受压时都能屈服。传统单芯材防屈曲支撑在小震和中震作用下具有足够的刚度,滞回耗能性能良好。但在大震作用下,传统防屈曲支撑通常以全截面达到屈服甚至损坏为主要特征,在屈服耗能后导致刚度的丧失,尤其是当遇到罕遇地震时,该类防屈曲支撑的滞回耗能能力往往不能满足预期设计地震要求,导致刚度过早丧失,最终防屈曲支撑失效。防屈曲支撑的核心受力构件又可划分成三个区域:约束屈服段、约束非屈服段和无约束非屈服段。为了保证防屈曲支撑在受力过程中仅在约束屈服段产生屈曲,需保证端部连接的可靠性,确保防屈曲支撑的无约束非屈服段始终 ...
【技术保护点】
1.一种具有双屈服点的双芯材多重钢管全钢防屈曲支撑,其特征是,包括内芯材管件和外芯材管件,所述内芯材管件套设于外芯材管件内部,且内芯材管件和外芯材管件之间具有设定空隙;所述内芯材管件和外芯材管件两端均固定于端部连接板,所述内芯材管件内套设有内约束套管,内约束套管一端与两端部连接板二者之一固定,内约束套管另一端悬空;所述外芯材管件外部套设有外约束套管,外约束套管一端与两端部连接板二者之另一固定,外约束套管另一端悬空。
【技术特征摘要】
1.一种具有双屈服点的双芯材多重钢管全钢防屈曲支撑,其特征是,包括内芯材管件和外芯材管件,所述内芯材管件套设于外芯材管件内部,且内芯材管件和外芯材管件之间具有设定空隙;所述内芯材管件和外芯材管件两端均固定于端部连接板,所述内芯材管件内套设有内约束套管,内约束套管一端与两端部连接板二者之一固定,内约束套管另一端悬空;所述外芯材管件外部套设有外约束套管,外约束套管一端与两端部连接板二者之另一固定,外约束套管另一端悬空。2.如权利要求1所述的防屈曲支撑,其特征是,所述内芯材管件和内约束套管之间具有设定空隙。3.如权利要求1所述的防屈曲支撑,其特征是,所述外芯材管件和外约束套管之间具有设定空隙。4.如权利要求1所述的防屈曲支撑,其特征是,所述内芯材管件采用低屈服点钢材制成,外芯材管件采用高屈服点钢材制成。5.如权利要求1所述的防屈曲支撑,其特征是,所述内芯材管件的管壁上开设至少一个凹槽或孔洞。6.如权利要求5...
【专利技术属性】
技术研发人员:朱绪林,杨彬,郑旭,付海清,
申请(专利权)人:山东省工程地震研究中心,
类型:发明
国别省市:山东,37
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