A kind of tensile anti-drop beam combined seismic isolation device and its construction method

Abstract

The invention provides a tension-resisting anti-beam-falling combined shock insulation device and a construction method thereof. The tension-resisting anti-beam-falling combined shock insulation device is characterized by including lead core rubber shock insulation supporting bases used for preventing horizontal falling of beams and tension-resisting devices used for vertical tension resisting; the lead core rubber shock insulation supporting bases are connected between bridge piers and main beams, one end of each tension-resisting device is fixed on the lower bottom surface of the corresponding main beam, the other end of each tension-resisting device is fixed on the top surface of the corresponding straining beam, the tension-resisting devices include upper U-shaped steel members and lower U-shaped steel members, and the upper-portion U-shaped steel members and the lower-portion U-shaped steel members are connected through left hand threads. The tension-resisting anti-beam-falling combined shock insulation device not only can achieve the function of preventing horizontal falling of beams, but also can meet the need of vertical tension resisting, the system is clear, the stress is clear, and the structure is simple; the device is economical and practical, and has good tension-resisting, anti-beam-falling and shock insulation effects and good applicability in the design of bridges in a high intensity earthquake zone.

Description

technical field [0001] The invention relates to a shock-isolation device, in particular to a combined shock-isolation device of tensile anti-drop beams and a construction method thereof. Background technique [0002] One of the warnings of the Wenchuan Earthquake is that we should pay close attention to the research and application of bridge shock absorption and isolation technology. The seismic isolation measures widely used in the bridge field are lead rubber isolation bearings. The support is made of rubber sheets and thin steel plates alternately laminated and then vulcanized, and filled with lead rods. Among them, the role of the thin steel plate is to restrain the lateral deformation of the rubber sheet, so that the rubber bearing has the same vertical stiffness as the conventional component. The role of the rubber sheet is to provide the required horizontal displacement and reduce the horizontal stiffness. The shock absorption and isolation mechanism of the lead ru...

AI Technical Summary

Problems solved by technology

However, high-strength anti-seismic blocks in major earthquakes will transfer energy to the substructure and foundation of the bridge, which will not only cause serious damage to the substructure, but also cause the existing blocks to be easily damaged due to their rigid structural characteristics of concrete or steel. The common problem of brittle failure of stopper due to instantaneous force

Therefore, the traditional method of setting stoppers to solve the problem of anti-falling beams in high-intensity earthquake areas not only has relatively large technical defects, but also is uneconomical in design

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