The use and function of rubber buffer block
The rubber buffer block has a large shear deformation to meet the horizontal displacement of the superstructure. Rubber buffer blocks are widely used in bridge real estate, hydropower projects, and house seismic facilities. Compared with the original steel base, the rubber buffer block has a simple structure and is easy to install; it has the advantages of saving steel, low price, easy maintenance, and convenient replacement, etc. Advantages, the height of the natural rubber mesh frame rubber pad is low, and the natural rubber mesh frame rubber pad is beneficial to the design of the bridge and reduce the cost; it has a good shock absorption effect, which can reduce the impact of the live load and seismic force on the real estate, then , Let's learn about the use and function of the rubber buffer block below!
Performance options for rubber bumpers:
According to its material and applicable temperature, the shock-absorbing rubber bracket of the node of the grid real estate is divided into two types: normal temperature type and cold-resistant type. The normal temperature type adopts neoprene (CR), suitable for -25-60; the cold-resistant type adopts natural rubber (NR), which is suitable for -40-60 climate area, adopts rubber buffer block, and the inclination of the node bottom plate shall not exceed 1%. The larger bearing capacity of the bracket needs to be consistent with the node reaction force, and the allowable deviation is preferably within 1%.
The lead core bearing bears the longitudinal load of the entire upper structure, which can not only prolong the structural period, but also provide a certain damping, redistribute the seismic force of the lower structure, that is, the legs and feet, and the displacement of the layer is not large, and there is a large amount of displacement. Good results. At the same time, the lead core support has a certain initial horizontal stiffness, which can resist the effect of load and braking load.
The structural requirements of the rubber buffer block, the currently used laminated support platform should take into account the respective interests of the steel plate. The pedestal is used in the construction, and under the effect of slowing down the longitudinal earthquake and torsion of the building structure horizontally, it can improve the ability of the building to resist earthquake. suitable for stacking brackets
The damping ratio must have lateral rigidity.
What is the working classification and principle of the lead-core support? The support table is laminated with sandwich steel plates and bonded by high temperature vulcanization. When a longitudinal load is applied to the support table, the lateral deformation of the layer is constrained, and the support table has a large longitudinal Bearing capacity; After the base is subjected to a horizontal load, the movement of the opposite side of the layer is greatly reduced, and the cushion can complete a large overall side movement without buckling, and maintain a small horizontal rigidity.
Generally, lead-core brackets only have the characteristics of high elasticity and low attenuation, and the attenuation ratio is about 0.03~0.05, which needs to be used in conjunction with other shock absorbers. Lead-core stents are made of common stents infused with lead cores. Pure lead materials have low yield point and high plastic deformation capacity, and the stents have binding force on the lead of the damping material, which only produces shear deformation, so it is beneficial to improve the initial stage of the stent. Stiffness and Damping Properties
The seismic isolation bearing plan refers to the installation of seismic isolation bearings, so that the bridge can be flexibly supported in the horizontal direction, increase the natural period of its direction, and at the same time improve the damping effect of the system through the damping device, so as to plan the response spectrum, it can be seen that if the system becomes larger, plan to reduce the load. Therefore, the seismic force also decreases. For bridges, after the natural period increases, the seismic isolation performance is judged according to whether the structure can improve the energy consumption during the earthquake, and the seismic isolation technology is adopted together. The unfortunate flutter effect of the bridge deck structure and the bridge substructure is avoided, and the relative displacement of the upper structure (beam body) does not affect the use of the bridge.
The above is the use and function of the rubber buffer block, if you want to know more, please feel free to contact us!