| Comparison Items | Lead - Core Isolation Rubber Bearing | Normal Rubber Bearing | High - Damping Rubber Bearing | |||||
| Structure | A lead core is inserted in the center of an ordinary rubber bearing. It is formed by alternately laminating and vulcanizing multiple layers of rubber and thin steel plates, with a lead core added in the middle. | It is formed by alternately laminating and vulcanizing multiple layers of rubber and thin steel plates. | Special additives are added to the rubber material, and its structure is similar to that of an ordinary rubber bearing. | |||||
| Working Principle | During an earthquake, the elastic deformation of the rubber prolongs the natural vibration period of the structure, reducing the input of seismic forces. The plastic deformation of the lead core dissipates a large amount of seismic energy. | It relies on the elasticity of the rubber to adapt to horizontal and vertical displacements caused by factors such as temperature changes and concrete shrinkage and creep of the structure. It provides a certain degree of flexibility during an earthquake. | It utilizes the internal friction generated during the deformation of the high - damping rubber material to dissipate energy. During an earthquake, it absorbs and dissipates seismic energy through the large - scale deformation of the rubber and provides appropriate stiffness and restoring force. | |||||
| Performance Characteristics | It has good isolation performance, can effectively reduce the seismic response of the structure. The lead core has strong energy - dissipation ability, and it has certain vertical load - bearing and horizontal deformation capabilities. | It has good elasticity and flexibility, can adapt to various deformations of the structure. It is relatively low in price and convenient for construction, but its seismic performance, especially its energy - dissipation ability during strong earthquakes, is limited. | It has high damping performance, can effectively dissipate seismic energy. It has good durability and anti - aging performance, and its mechanical properties are stable under different frequencies and amplitudes. | |||||
| Application Scenarios | Buildings with high requirements for earthquake safety in earthquake - prone areas, such as hospitals, schools, high - rise buildings, as well as important industrial facilities and bridge structures. | General building and bridge structures, used to meet conventional deformation requirements, and are suitable for areas with low seismic intensity. | Places with high requirements for the seismic performance of structures where lead - core isolation rubber bearings are not suitable, such as areas with strict restrictions on lead pollution or important buildings and bridges with high requirements for the durability and reliability of bearings. | |||||
| Maintenance Cost | Regular inspection of the lead core state and rubber part is required to prevent the lead core from being exposed or corroded. The maintenance cost is relatively high. | Regular inspection of rubber aging, cracking, and bearing connection parts is required. The maintenance is simple and the cost is low. | Pay attention to the performance changes of the rubber. Due to the stable material performance, the maintenance cycle may be long, and the overall cost is moderate. | |||||
Hebei Luze New Materials Technology Co.,Ltd.
A professional service provider and manufacturer specialized in the seismic isolation and vibration mitigation industry, offering a wide varity of rubber bearings and diverse dampers for buildings, bridges and other structures.
