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A platform for research: civil engineering, architecture and urbanism
Eddy current energy dissipation and vibration reduction type bridge expansion joint device
The invention discloses an eddy current energy dissipation and vibration reduction type bridge expansion joint device. The eddy current energy dissipation and vibration reduction type bridge expansionjoint device comprises embedded steel plates, metal comb plates, an eddy current energy dissipation and vibration reduction mechanism and a magnetic shielding mechanism; the eddy current energy dissipation and vibration reduction mechanism comprises permanent magnet assemblies and a conductor plate, one permanent magnet assembly is arranged at the bottom of each of comb teeth of the metal comb plates, each permanent magnet assembly comprises a plurality of permanent magnets of which the polarities are alternately arranged, and the conductor plate is arranged in an expansion joint under the permanent magnet assemblies. and the magnetic shielding mechanism is used for magnetic isolation. According to the eddy current energy dissipation and vibration reduction type bridge expansion joint device, on the basis of the eddy current effect, the permanent magnets are fixed to the bottoms of the metal comb plates in a staggered mode, when relative displacement occurs along with bridge vibration, eddy current is generated by the conductor plate due to magnetic induction line cutting, opposite damping force is generated in the conductor plate so as to weaken vibration response of a main beam,and bridge vibration energy can be consumed through the resistance heat effect, so that finally, the effects of energy dissipation and vibration reduction are achieved; and meanwhile, bridge vibration and in-plane deflection caused by dynamic loads such as vehicles, strong wind and earthquakes can be effectively controlled.
本发明公开了一种电涡流消能减振型桥梁伸缩缝装置，包括预埋钢板、金属梳齿板、电涡流消能减振机构和磁屏蔽机构。电涡流消能减振机构包括永磁组件和导体板；在金属梳齿板的每个梳齿底部各安装一个永磁组件；每个永磁组件均包括若干个极性交互排列的永磁体；导体板安装在永磁组件正下方的伸缩缝中；磁屏蔽机构用于隔磁。本发明基于电涡流效应，永磁铁交错固定在金属梳齿板底部，并随桥梁振动发生相对位移时，导体板因切割磁感线而产生电涡流，导体板内产生相反的阻尼力，以减弱主梁的振动响应，并能通过电阻热效应消耗桥梁振动的能量，最终达到消能减振的作用。同时，还能对车辆、强风、地震等动力荷载引起的桥梁振动及平面内偏转予以有效控制。
Eddy current energy dissipation and vibration reduction type bridge expansion joint device
The invention discloses an eddy current energy dissipation and vibration reduction type bridge expansion joint device. The eddy current energy dissipation and vibration reduction type bridge expansionjoint device comprises embedded steel plates, metal comb plates, an eddy current energy dissipation and vibration reduction mechanism and a magnetic shielding mechanism; the eddy current energy dissipation and vibration reduction mechanism comprises permanent magnet assemblies and a conductor plate, one permanent magnet assembly is arranged at the bottom of each of comb teeth of the metal comb plates, each permanent magnet assembly comprises a plurality of permanent magnets of which the polarities are alternately arranged, and the conductor plate is arranged in an expansion joint under the permanent magnet assemblies. and the magnetic shielding mechanism is used for magnetic isolation. According to the eddy current energy dissipation and vibration reduction type bridge expansion joint device, on the basis of the eddy current effect, the permanent magnets are fixed to the bottoms of the metal comb plates in a staggered mode, when relative displacement occurs along with bridge vibration, eddy current is generated by the conductor plate due to magnetic induction line cutting, opposite damping force is generated in the conductor plate so as to weaken vibration response of a main beam,and bridge vibration energy can be consumed through the resistance heat effect, so that finally, the effects of energy dissipation and vibration reduction are achieved; and meanwhile, bridge vibration and in-plane deflection caused by dynamic loads such as vehicles, strong wind and earthquakes can be effectively controlled.
本发明公开了一种电涡流消能减振型桥梁伸缩缝装置，包括预埋钢板、金属梳齿板、电涡流消能减振机构和磁屏蔽机构。电涡流消能减振机构包括永磁组件和导体板；在金属梳齿板的每个梳齿底部各安装一个永磁组件；每个永磁组件均包括若干个极性交互排列的永磁体；导体板安装在永磁组件正下方的伸缩缝中；磁屏蔽机构用于隔磁。本发明基于电涡流效应，永磁铁交错固定在金属梳齿板底部，并随桥梁振动发生相对位移时，导体板因切割磁感线而产生电涡流，导体板内产生相反的阻尼力，以减弱主梁的振动响应，并能通过电阻热效应消耗桥梁振动的能量，最终达到消能减振的作用。同时，还能对车辆、强风、地震等动力荷载引起的桥梁振动及平面内偏转予以有效控制。
Eddy current energy dissipation and vibration reduction type bridge expansion joint device
一种电涡流消能减振型桥梁伸缩缝装置
TAO TIANYOU (author) / SHI PENG (author) / WANG HAO (author)
2021-03-19
Patent
Electronic Resource
Chinese
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