Buffer type pulling cable seismic reduction support free of additional vertical force

Abstract

The invention belongs to the field of civil engineering and seismic resistance, and provides a buffer type pulling cable seismic reduction support free of additional vertical force. The buffer type pulling cable seismic reduction support comprises a seismic reduction support, a buffer type anchor device, pulling cables and guide blocks. The seismic reduction support comprises an upper support plate and a lower support plate. The pulling cables are additionally arranged on the side face of the seismic reduction support, are directly connected with the upper support plate in a penetrating mannerand are connected with the lower support plate through the buffer type anchor device. The connection anchor points of the buffer type anchor device and the pulling cables should be close to the uppersupport plate. By means of the buffer type pulling cable seismic reduction support, under the effect of an earthquake, the support can be allowed to deform largely, and the structural earthquake internal force can be reduced; by arranging the pulling cables, the support is controlled to conduct horizontal sliding displacement, the support displacement can be reasonable and controllable, and bridge falling and unfavorable collision of superstructures of bridges are prevented; and meanwhile it is avoided that vertical component force is generated during pulling cable limiting. The buffer type anchor device is provided with soft steel buffer energy consumption components, soft steel is allowed to generate limited elastic-plastic deformation, impact force generated during pulling cable limiting is reduced, and the structural internal force response is reduced.

Description

technical field [0001] The application belongs to the fields of civil engineering and anti-seismic, and in particular relates to a cable shock-absorbing bearing without additional vertical force buffering. Background technique [0002] Earthquake disaster is a natural disaster that has a great impact on human society, and it is sudden and unpredictable. In order to ensure the safety of people's lives and properties, engineers are committed to the seismic design of structures. The seismic isolation design of bridge structures is the main means of bridge seismic design, and the seismic isolation design based on bearings is also continuously developed and applied. [0003] At present, the main bearing forms at home and abroad include basin rubber bearings, spherical steel bearings, hyperboloid (friction pendulum) bearings, lead core rubber bearings, high damping rubber bearings and plate rubber bearings. Among the commonly used bridge bearings mentioned above, spherical steel ...

AI Technical Summary

Problems solved by technology

Among the commonly used bridge bearings mentioned above, spherical steel bearings and basin rubber bearings are widely used due to their high vertical bearing capacity and stable bearing performance. The application of falling beam disasters in areas with high seismic intensity is restricted; the hyperboloid (friction pendulum) bearing is a kind of shock-absorbing and isolating bearing, which has good self-resetting ability and frictional energy dissipation capacity, but it will occur during normal operation The phenomenon of beam lifting is unfavorable to the structural force; for lead core and high damping rubber bearings, it is generally used when the vertical bearing capacity of the bearing is not required, and the vibration reduction and isolation efficiency is not high in earthquakes with multi-spectrum effects. problem, and lead is a poisonous substance to the human body, which is easy to cause pollution to the environment; for plate rubber bearings, it is widely used in small and medium-span bridges, but the bearings are prone to slip under the action of earthquakes, resulting in unacceptable displacement of the bearings. control, prone to falling beam disasters

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