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A platform for research: civil engineering, architecture and urbanism
Railway self-resetting pier with external SMA energy consumption device
The invention discloses a railway self-resetting pier with an external SMA (Shape Memory Alloy) energy consumption device, which relates to the technical field of seismic mitigation and isolation of bridge structures and is structurally characterized by comprising a pier column, the SMA energy consumption device, a steel plate, a separation surface, a pile foundation bearing platform and an additional platform. And the bottom surface of the adding platform and the surface of the pile foundation bearing platform are wrapped by steel plates. The SMA energy consumption device is composed of an SMA tow, a pre-embedded steel bar and an anchorage device, the SMA tow penetrates through the platform adding flange, one end of the anchorage device is anchored to the platform adding flange through the anchorage device, and the other end of the anchorage device is connected with the pre-embedded steel bar. According to the railway self-resetting pier with the external SMA energy dissipation device, self-resetting of the pier can be achieved through the superelasticity effect of SMA after an earthquake, the pier can be lifted off, swing and isolated in the earthquake, earthquake energy is dissipated through the SMA energy dissipation device, and therefore the pier does not generate plastic hinge damage, the anti-seismic performance of a bridge structure is effectively improved, and the service life of the bridge is prolonged. And the anti-seismic targets of protecting the pier main body and the foundation are achieved. The SMA energy consumption device is easy to replace after being damaged, the pier can quickly recover the normal use function after replacement, the operation and maintenance cost can be greatly reduced, and good social comprehensive benefits are achieved.
本发明公开了一种外置SMA(形状记忆合金)耗能装置的铁路自复位桥墩，涉及桥梁结构减、隔震技术领域，其结构特征是由墩柱、SMA耗能装置、钢板、分离面、桩基础承台和加台构成。墩台分离设计，加台底面与桩基础承台表面由钢板包裹。SMA耗能装置由SMA丝束、预埋钢棒及锚具组成，SMA丝束穿过加台翼缘，锚具将其一端锚固在加台翼缘上，另一端与预埋钢棒连接。该外置SMA耗能装置的铁路自复位桥墩既能在震后利用SMA自身的超弹性效应助力桥墩实现自复位，又可以在震中使桥墩发生提离摇摆隔震，并通过SMA耗能装置耗散地震能量，从而使桥墩不产生塑性铰破坏，有效提高桥梁结构的抗震性能，达到既保护桥墩主体又保护基础的抗震目标。SMA耗能装置损坏后易更换，更换后桥墩将迅速恢复正常使用功能，可大大降低运营维护成本，具有良好的社会综合效益。
Railway self-resetting pier with external SMA energy consumption device
The invention discloses a railway self-resetting pier with an external SMA (Shape Memory Alloy) energy consumption device, which relates to the technical field of seismic mitigation and isolation of bridge structures and is structurally characterized by comprising a pier column, the SMA energy consumption device, a steel plate, a separation surface, a pile foundation bearing platform and an additional platform. And the bottom surface of the adding platform and the surface of the pile foundation bearing platform are wrapped by steel plates. The SMA energy consumption device is composed of an SMA tow, a pre-embedded steel bar and an anchorage device, the SMA tow penetrates through the platform adding flange, one end of the anchorage device is anchored to the platform adding flange through the anchorage device, and the other end of the anchorage device is connected with the pre-embedded steel bar. According to the railway self-resetting pier with the external SMA energy dissipation device, self-resetting of the pier can be achieved through the superelasticity effect of SMA after an earthquake, the pier can be lifted off, swing and isolated in the earthquake, earthquake energy is dissipated through the SMA energy dissipation device, and therefore the pier does not generate plastic hinge damage, the anti-seismic performance of a bridge structure is effectively improved, and the service life of the bridge is prolonged. And the anti-seismic targets of protecting the pier main body and the foundation are achieved. The SMA energy consumption device is easy to replace after being damaged, the pier can quickly recover the normal use function after replacement, the operation and maintenance cost can be greatly reduced, and good social comprehensive benefits are achieved.
本发明公开了一种外置SMA(形状记忆合金)耗能装置的铁路自复位桥墩，涉及桥梁结构减、隔震技术领域，其结构特征是由墩柱、SMA耗能装置、钢板、分离面、桩基础承台和加台构成。墩台分离设计，加台底面与桩基础承台表面由钢板包裹。SMA耗能装置由SMA丝束、预埋钢棒及锚具组成，SMA丝束穿过加台翼缘，锚具将其一端锚固在加台翼缘上，另一端与预埋钢棒连接。该外置SMA耗能装置的铁路自复位桥墩既能在震后利用SMA自身的超弹性效应助力桥墩实现自复位，又可以在震中使桥墩发生提离摇摆隔震，并通过SMA耗能装置耗散地震能量，从而使桥墩不产生塑性铰破坏，有效提高桥梁结构的抗震性能，达到既保护桥墩主体又保护基础的抗震目标。SMA耗能装置损坏后易更换，更换后桥墩将迅速恢复正常使用功能，可大大降低运营维护成本，具有良好的社会综合效益。
Railway self-resetting pier with external SMA energy consumption device
一种外置SMA耗能装置的铁路自复位桥墩
XIA XIUSHEN (author) / ZHANG YONGQIANG (author) / ZHONG YAWEI (author) / DAI SHENGYONG (author)
2023-05-05
Patent
Electronic Resource
Chinese
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