Self-resetting FSMA composite damper and working method thereof
A composite damping and self-reset technology, which is applied in building components, building types, earthquake resistance, etc., can solve problems affecting structural design performance, structural damage, solder joint fracture, etc., and achieve the effect of simple structure, low cost and good reliability.
Pending Publication Date: 2020-08-18
FUZHOU UNIV
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Problems solved by technology
The defect of this technical solution is that the welding point between the SMA spring and the bottom of the inner cylinder may break during a large earthquake. At this time, the tensile stiffness and compressive stiffness of the damper will no longer be equal, which will greatly affect the design of the structure performance, which increases the possibility of structural damage during earthquakes
Method used
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Embodiment Construction
[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0018] Example: such as Figure 1~3 As shown, a self-resetting FSMA composite damper includes an outer plate 2 and an inner plate 1 located in the middle of the outer plate. The outer plate and the inner plate are tightly connected by a plurality of pre-tightening bolts 3 to realize the main function of the damper. The deformation method: the axial tension and compression are carried out, which has the characteristics of displacement correlation; the SMA strand 5 is arranged between the outer plate and the inner plate, and the two ends of the SMA strand are respectively fixed on the top surface of the outer plate or It is the bottom surface, the middle part of the SMA stranded wire is fixed on the inner plate, and the SMA stranded wire produces a rebound force due to stretching and deformation, which provides the force required for th...
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The invention provides a self-resetting FSMA composite damper. The self-resetting FSMA composite damper comprises an external plate and an internal plate located in the middle of the external plate, the external plate and the internal plate are connected by a plurality of pre-tightening bolts in a compressed mode, an SMA stranded wire is arranged between the external plate and the internal plate,the two ends of the SMA stranded wire are correspondingly fixed to the top surface or the bottom surface of the external plate, and the middle of the SMA stranded wire is fixed to the internal plate.According to the self-resetting FSMA composite damper, the structure is simple, design is reasonable, and the situation that the damper has the same mechanical characteristics under forward and reverse loading is achieved; the reliability of the friction energy consumption and self reset is improved; and meanwhile, the stress path of the damper is simplified, design, manufacture and installation are convenient, and wide application prospects are achieved.
Description
technical field [0001] The invention relates to a self-resetting FSMA composite damper and a working method thereof. Background technique [0002] Most of the existing frictional energy dissipation dampers have not been designed for self-resetting performance after an earthquake. At the same time, the frictional energy dissipation dampers with self-resetting performance mostly use prestressed steel strands or shape memory alloys, etc. The reaction force provided by the components is used to realize the self-resetting function of the damper after shock. On January 19, 2018, the State Intellectual Property Office authorized and announced the invention patent of "a second-order friction damper and shock absorption method" (announcement number: CN 106013922 B), which involves a second-order friction damper , a second-order friction damper includes a first-order friction unit and a second-order friction unit, the first-order friction unit and the second-order friction unit are c...
Claims
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IPC IPC(8): E04H9/02E04B1/98
CPCE04H9/021E04B1/98
Inventor 颜学渊施燊毛会敏陈再现李素超陈伟宏
Owner FUZHOU UNIV