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A platform for research: civil engineering, architecture and urbanism
Negative stiffness anti-seismic device for long-span bridge structure
The invention provides a negative stiffness anti-seismic device for a long-span bridge structure. The negative stiffness anti-seismic device comprises a base, two fixed rods and a movable hinge. The base comprises a bottom plate and two side plates; the two fixing rods are fixed on the side plates; a sliding sleeve is arranged on each fixing rod; the movable hinge is fixedly connected with the two sliding sleeves through a pressing rod at the same time. Each fixing rod is sleeved with an elastic piece. The device has the beneficial effects that the overall rigidity of the device is reduced through the elastic pieces, the springs provide negative rigidity for the device when the bridge body is excited by vibration, the natural vibration period of the structure is prolonged, and the anti-seismic capacity of the structure is improved. And when the bridge body is subjected to large vibration excitation, the device can be in the maximum negative stiffness state, the two blocking pieces can ensure that the sliding bearing cannot slide out when subjected to large vibration, and the safety of the bridge body is ensured. And meanwhile, the device is fixed by the safety pin when in a normal use state and has good structural stability, the safety pin falls off when the structure is excited by vibration, and the spring stretches and retracts to provide negative stiffness for the structure.
本发明提供一种用于大跨度桥梁结构的负刚度抗震装置，包括底座、两固定杆以及活动铰；底座包括底板和两侧板；两固定杆固定于侧板上；每一固定杆上设有一滑套；活动铰通过压杆同时与两滑套固定连接；每一固定杆上套设有一弹性件。本发明的有益效果为：该装置通过弹性件降低装置整体刚度，桥体受到震动激励时弹簧为装置提供负刚度，延长了结构的自振周期，提高了结构抗震能力。且桥体受到较大震动激励时该装置会处于最大负刚度状态，两挡片能够保证滑动轴承受到较大震动时不会滑出，保证了桥体的安全性。同时该装置处于正常使用状态时由安全销钉固定，具有良好的结构稳定性，结构受到震动激励时安全销钉脱落，弹簧伸缩为结构提供负刚度。
Negative stiffness anti-seismic device for long-span bridge structure
The invention provides a negative stiffness anti-seismic device for a long-span bridge structure. The negative stiffness anti-seismic device comprises a base, two fixed rods and a movable hinge. The base comprises a bottom plate and two side plates; the two fixing rods are fixed on the side plates; a sliding sleeve is arranged on each fixing rod; the movable hinge is fixedly connected with the two sliding sleeves through a pressing rod at the same time. Each fixing rod is sleeved with an elastic piece. The device has the beneficial effects that the overall rigidity of the device is reduced through the elastic pieces, the springs provide negative rigidity for the device when the bridge body is excited by vibration, the natural vibration period of the structure is prolonged, and the anti-seismic capacity of the structure is improved. And when the bridge body is subjected to large vibration excitation, the device can be in the maximum negative stiffness state, the two blocking pieces can ensure that the sliding bearing cannot slide out when subjected to large vibration, and the safety of the bridge body is ensured. And meanwhile, the device is fixed by the safety pin when in a normal use state and has good structural stability, the safety pin falls off when the structure is excited by vibration, and the spring stretches and retracts to provide negative stiffness for the structure.
本发明提供一种用于大跨度桥梁结构的负刚度抗震装置，包括底座、两固定杆以及活动铰；底座包括底板和两侧板；两固定杆固定于侧板上；每一固定杆上设有一滑套；活动铰通过压杆同时与两滑套固定连接；每一固定杆上套设有一弹性件。本发明的有益效果为：该装置通过弹性件降低装置整体刚度，桥体受到震动激励时弹簧为装置提供负刚度，延长了结构的自振周期，提高了结构抗震能力。且桥体受到较大震动激励时该装置会处于最大负刚度状态，两挡片能够保证滑动轴承受到较大震动时不会滑出，保证了桥体的安全性。同时该装置处于正常使用状态时由安全销钉固定，具有良好的结构稳定性，结构受到震动激励时安全销钉脱落，弹簧伸缩为结构提供负刚度。
Negative stiffness anti-seismic device for long-span bridge structure
一种用于大跨度桥梁结构的负刚度抗震装置
ZHU WEIYUAN (author) / PANG YUTAO (author) / CHENG JIAQI (author) / SUN YIXIAN (author) / HUANG CAN (author) / ZHOU XIAOYONG (author)
2022-12-02
Patent
Electronic Resource
Chinese
IPC:
E01D
BRIDGES
,
Brücken
Longitudinal Seismic Forces of Long-Span Bridge
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| British Library Conference Proceedings | 1990
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