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Low-cost high-ductility anti-fatigue core energy dissipation structure and anti-buckling energy dissipation support
The invention relates to a low-cost high-ductility anti-fatigue core energy dissipation structure and a buckling-restrained energy dissipation support. The core energy dissipation structure at least comprises a first steel plate and a second steel plate, and the second steel plate must only be adjacent to the first steel plate and connected with the first steel plate in a welded mode. The microstructures of the two types of steel plate materials are mainly ferritic structures; the yield strength and plastic deformation flow stress of the first steel plate material are higher than those of the second steel plate material; in the plastic deformation strengthening stage, when the true strain is not larger than 0.12, the deformation work hardening rate of the first steel plate material is not smaller than the deformation work hardening rate of the second steel plate material; under the fatigue deformation conditions that the strain amplitude is 1%, the loading frequency is 0.1-0.2 Hz and the strain ratio is-1, the room-temperature fatigue life of the two types of steel plate materials is not less than 500 weeks. The ratio of the ultimate allowable displacement to the calculated yield displacement of the buckling-restrained energy dissipation support is not less than 7, and the ultimate allowable displacement is not less than 1/80 of the length of the buckling-restrained energy dissipation support.
本发明涉及一种低成本高延性抗疲劳芯部耗能结构及防屈曲耗能支撑。所述芯部耗能结构至少包含一块第一钢板和一块第二钢板，第二钢板必须而且只能与第一钢板相邻并焊接相连。两类钢板材料的微观组织均主要为铁素体组织；第一钢板材料的屈服强度和塑性变形流动应力均高于第二钢板材料；在塑性变形强化阶段，真应变不大于0.12时，第一钢板材料的变形加工硬化率不小于第二钢板材料的变形加工硬化率；在应变幅1％、加载频率0.1～0.2Hz、应变比‑1的疲劳变形条件下，两类钢板材料的室温疲劳寿命均不小于500周次。本发明防屈曲耗能支撑的极限允许位移与计算屈服位移之比不小于7，且极限允许位移不小于防屈曲耗能支撑长度的1/80。
Low-cost high-ductility anti-fatigue core energy dissipation structure and anti-buckling energy dissipation support
The invention relates to a low-cost high-ductility anti-fatigue core energy dissipation structure and a buckling-restrained energy dissipation support. The core energy dissipation structure at least comprises a first steel plate and a second steel plate, and the second steel plate must only be adjacent to the first steel plate and connected with the first steel plate in a welded mode. The microstructures of the two types of steel plate materials are mainly ferritic structures; the yield strength and plastic deformation flow stress of the first steel plate material are higher than those of the second steel plate material; in the plastic deformation strengthening stage, when the true strain is not larger than 0.12, the deformation work hardening rate of the first steel plate material is not smaller than the deformation work hardening rate of the second steel plate material; under the fatigue deformation conditions that the strain amplitude is 1%, the loading frequency is 0.1-0.2 Hz and the strain ratio is-1, the room-temperature fatigue life of the two types of steel plate materials is not less than 500 weeks. The ratio of the ultimate allowable displacement to the calculated yield displacement of the buckling-restrained energy dissipation support is not less than 7, and the ultimate allowable displacement is not less than 1/80 of the length of the buckling-restrained energy dissipation support.
本发明涉及一种低成本高延性抗疲劳芯部耗能结构及防屈曲耗能支撑。所述芯部耗能结构至少包含一块第一钢板和一块第二钢板，第二钢板必须而且只能与第一钢板相邻并焊接相连。两类钢板材料的微观组织均主要为铁素体组织；第一钢板材料的屈服强度和塑性变形流动应力均高于第二钢板材料；在塑性变形强化阶段，真应变不大于0.12时，第一钢板材料的变形加工硬化率不小于第二钢板材料的变形加工硬化率；在应变幅1％、加载频率0.1～0.2Hz、应变比‑1的疲劳变形条件下，两类钢板材料的室温疲劳寿命均不小于500周次。本发明防屈曲耗能支撑的极限允许位移与计算屈服位移之比不小于7，且极限允许位移不小于防屈曲耗能支撑长度的1/80。
Low-cost high-ductility anti-fatigue core energy dissipation structure and anti-buckling energy dissipation support
一种低成本高延性抗疲劳芯部耗能结构及防屈曲耗能支撑
YANG QI (author) / ZHU MINGWAN (author)
2024-07-30
Patent
Electronic Resource
Chinese
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