China since the 1960s began to develop, rectangular laminated rubber bearing seismic bearing, and the trial has started in Guangdong, Shanghai, Shandong, Guangxi, Fujian, Jiangsu, Zhejiang and Anhui provinces and parts of roads and bridges in 1995. The country's first trial of laminated rubber bearings in Guangdong Zhaoqing roads and bridges, has been 40 years of history of use of laminated rubber bearings have become widely used in highway and city bridges and culverts, and one of the popular forms an abutment. China's first laminated rubber bearings content will be included in the 1975 issue of "Highway Bridge Design Code" (Trial) in 1980 to amend the "Highway Bridge Design Specifications" Ministry of Transportation Highway Planning and Design Institute commissioned the Shanghai Municipal Engineering Design Institute in 200t pressure test conducted on a batch of laminated rubber machine mechanical testing, test results included in the "reinforced concrete machine prestressed concrete highway bridge design specifications" (JTJ023-85) .1988 annual traffic does not begin to develop the transportation industry standard "highway bridge plate rubber Supports Specifications Series "(JT 3132.1-88), this series of specifications to comply fully with the provisions of JTJ 023-85 of the design. At the same time developed a "highway bridges laminated rubber bearings technical conditions" (JT 3132.3-88) and subsequently have developed a "highway bridges mechanical properties of laminated rubber bearings inspection rules" (JT 3132.3-90), this rectangular laminated rubber bearings design, processing and use of a reliable basis. In traffic without attention and strong support, but also issued a circular experimental studies of laminated rubber bearings and experimental research on complementary rectangular laminated rubber bearing, the Ministry of Transportation Highway Planning and Design Institute has commissioned the Academy of Railway Sciences On the 500t and 2000t pressure testing machine batch round, rectangular and large-scale mechanical testing of laminated rubber bearings and some manufacturers of products exported to foreign countries, require mechanical properties testing, foreigners saw our testing equipment, are reflected too far behind, so this standard also proposed the use of computer-controlled test equipment should be capable of automatic continuous smooth loading, unloading, automatic collection of test data, automatic drawing stress-strain curves and print test structure. This can minimize human interference during operation, to improve the detection accuracy, even if the current detection unit does not have to cover some of the testing methods, but the standard also suggested that if the project have such testing equipment, testing units can send a corresponding The detection method of testing personnel qualification certificates to the factory supervision and testing, this method in foreign countries are allowed. The detection units should try to improve and update detection equipment to ensure serious type, the newly revised industry standards correctness, law enforcement detection structure, mechanical properties of the test methods and procedures, load kzqz seismic bearings, unload speed, calculation methods Test made clear that discipline etc seismic grid bearing, hoping detection units, engineering expression of self-checking test results according to uniform regulations. So that each person a very clear, past the old standard also requires highway seismic bearings, but the units are not uniform, and some results are given, it is difficult to understand what. The mechanical properties of the test requirements for seat complements the two, one is bearing shear adhesion test, a type of aging bearing shear-type test, it is determined that an important indicator of the quality of bearing performance. Hao-engineering rubber, kzqz seismic bearings, seismic bearings supplied by Hao-engineering rubber. Search for "grid bearings, bridge expansion joints, water stop, bridge bearings, rubber bearings, spherical steel bearing" fly suppliers, network operators choose to have a full alliance Certified: Engineering Rubber Co., Ltd. Hengshui HaoTong (www.htgcxj.com), trustworthiness and reliability, "business alliance customer service" on page now click on live chat with us now!