HC Plastics News: On the evening of August 8, a 7.0-magnitude earthquake occurred in Jiuzhaigou County, Aba Prefecture, Sichuan Province, with a focal depth of 20 kilometers, which attracted widespread attention from domestic and foreign media and the public.
Earthquakes are very harmful in natural disasters. Originally, rubber, as a kind of polymer elastomer material, has been regarded as a special material for dealing with earthquakes since the 1950s, and can play a role in reducing the damage of earthquakes. From the results achieved, there are more unparalleled features of other materials.
Anti-seismic products based on rubber have been successively released, and progress has been made in Japan and the United States. Research and trials in this area have also been carried out in China, and results have been accumulated.
Rubber isolation bearing
Anatomical map of rubber seismic isolation bearing
The isolated building is mainly insulated by rubber bearings. The rubber isolation bearing can reduce the earthquake effect, eliminate or effectively reduce structural or non-structural damage, and thus play the role of isolation and reduction of seismic energy.
In fact, most of the seismic energy is consumed by the large deformation movement from the horizontal to the large deformation movement of the isolation layer, which mitigates the inertial earthquake effect on the superstructure, effectively reduces the structural acceleration response caused by the earthquake, reduces the interlaminar shear force and the corresponding shear. Deformation.
There are several types of rubber seismic isolation bearings: high Zuni rubber bearings, natural rubber bearings, lead rubber bearings, and elastic sliding bearings. They have their own characteristics and the installation procedures are different.
Applications
China made the world's first rubber bearing isolation housing building
Academician Zhou Fulin of the Chinese Academy of Engineering.
Located at No. 38, Linghai Road, Shantou City, it has the world's first insulated residential building with rubber bearings and the first isolated house in China. The earthquake-resistant building was completed in 1993 and is an 8-storey residential building with 56 rooms.
During the earthquake, the isolation building slowly swayed on the rubber isolation layer, which reduced the seismic response to a low level. The structure of the house remained elastic during the earthquake without any damage, but only slightly swayed, and the occupants had little feeling. The United Nations Industrial Development Organization (UNIDO) convened an international conference in Shantou to promote this technology to countries around the world, calling it the “third milestone in the development of world-seated technologyâ€.
It is understood that Zhou Fulin, an academician of the Chinese Academy of Engineering, is a member of the National Wenchuan Earthquake Expert Committee and the design team leader of the Shantou Seismic Building Project. In recent years, the Zhou Fulin team has devoted itself to the theoretical research and engineering application of the new technology system of “separated interval†and “three-dimensional isolationâ€, and the results have been used in many domestic projects.
Hong Kong-Zhuhai-Macao Bridge rubber element protection against magnitude 8 earthquake
A rubber isolation bearing developed by Times New Materials was installed on the pier of Hong Kong-Zhuhai-Macao Bridge.
China's largest cross-sea bridge, the Hong Kong-Zhuhai-Macao Bridge, is equipped with rubber isolation bearings developed by Times New Materials on each pier to resist the damage of bridges caused by external forces such as typhoons and earthquakes.
At that time, the Hong Kong-Zhuhai-Macao Bridge Engineering Team and the design team worked with the Zhou Fulin team to solve the seismic design problem by using the shock-absorbing technology on the longest cross-sea bridge with seismic faults passing through the world.
Zhou Fulin took the team and, after detailed calculation and analysis, placed the isolation layer on the top of the pier. When the earthquake came, the pier and the bridge were soft, and the earthquake force was about 1/3 of the original.
Kunming New Airport Terminal
The Kunming New Airport Terminal is the world's largest single isolation building.
The realization of the largest single-seismic isolation building in the world, the Kunming New Airport Terminal, has developed large-size high-load bearings, low-rigidity isolation bearings, high-damping isolation bearings, and sliding branches with low friction coefficient. seat. In the rubber formula and production process, self-innovation has been realized, which overcomes the problem of poor performance and quality stability of the seismic isolation bearing, and the seismic performance has reached the level of developed countries.
The scientific and technological innovation realized by the isolation technology of the terminal building of Kunming New Airport has obtained a number of patents. The relevant experience has enriched and improved the national standards and relevant industry norms of China's isolation technology, and promoted the advancement of isolation technology. 
Editor in charge: Wang Ning 12
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