上海辰山植物园温室采用铝合金单层网壳结构,其单体最大长度达到204 m,属于超长结构,温度应力的影响将是结构设计的一大难点,加上铝合金材料的线膨胀系数为钢材的两倍。如果采用固定支座方案,将很难解决温度应力问题,因此设计时采用了滑动支座。该结构的特点还在于其支座数量很多,并且边界为闭合回路,因此只有当支座摩擦系数很小时(经研究为0.01左右)才能很好地释放温度应力。因此,该项目采用一种锟轴滚动滑移限位弹簧支座,经过试验和现场实测,该支座能很好地满足设计的要求。 Shanghai Chenshan Botanical Garden Greenhouse using aluminum single-layer reticulated shell structure, the maximum length of the monomer 204 m, belongs to the long structure, the impact of temperature stress will be a structural design of a major difficulty, coupled with aluminum alloy linear expansion coefficient Twice as steel. If using a fixed bearing program, it will be difficult to solve the problem of thermal stress, so the design of the sliding bearing. The structure is also characterized by a large number of bearings and a closed loop boundary, so that the temperature stress can be well released only when the bearing friction coefficient is small (about 0.01 for the study). Therefore, the project uses a roller shaft rolling sliding limit spring bearing, after testing and field measurements, the bearing can meet the design requirements.