盆式橡胶支座自七十年代在我国公路、铁路桥梁上采用以来,已发展到一千吨级的支座。当前该支座使用的橡胶,国内外均以氯丁橡胶为主,氯了橡胶具有较好的耐老化性能,但仅适用在温度为-25℃以上地区。由于我国幅员广大,如东北、华北北部及西北北部等地区,冬季最低温度均在-25℃以 Basin rubber bearing since the seventies in our country road, railway bridge adopted, has developed to a one thousand ton bearing. At present, the rubber used for this bearing is neoprene mainly at home and abroad. Chlorinated rubber has better anti-aging properties, but it is only suitable for areas above -25 ℃. Due to the vast territory of our country, such as northeast, northern North China and northwestern North China, the minimum temperature in winter is -25 ℃