楼梯梯段不同滑动支座设置的对比  

Comparison of different sliding bearing settings of stair inclined plate

作　　者：林锦滔 

机构地区：[1]福建九鼎工程质量检测有限公司,福建福州350000

出　　处：《福建建设科技》2016年第4期21-23,28,共4页Fujian Construction Science & Technology

摘　　要：震害经验表明设计中未考虑楼梯刚度效应,可能使地震中梯段斜板、梯梁、梯柱乃至框架柱发生不同程度损毁,理论分析的规律也揭示梯间引入的刚度将使得构件"内力重分布"同时改变结构动力特性。目前设计对楼梯的处理包括将楼梯同时建模以及通过设置滑动支座减小楼梯对主体结构的影响,其中滑动支座因设置的灵活性赢得设计人员青睐。针对滑动支座设置于梯段不同位置将对楼梯内力及动力特性影响效果不同,且不同滑动实现方式有不同的要求。通过力学求解器建立梯段不同部位设置滑动支座的楼梯间模型,对比滑动支座设置于楼梯梯段不同位置对其刚度及动力特性的影响做了分析,同时对不同形式滑动支座设计的注意要点做了归纳。表明模型3、4、5所代表的楼梯形式对减小楼梯对结构影响效果较好,同时对挑耳承载力、滑动端变形量及翘起等问题做了归纳。Earthquake damage experience shows that if the staircase stiffness effect is not considered in the design,the earthquake may make the ladder inclined plate,beam,ladder column and frame columns have different degrees of damage. The theoretical analysis also revealed the staircase stiffness will make the internal force redistribution and change the structure dynamic characteristics. The design method includes considering stairs stiffness or setting the sliding support. According to the different position of the sliding bearing,the effect of the internal force and the dynamic characteristics of the stair are different. The different sliding mode has different requirements. The model of the staircase of the sliding bearing in different parts of the ladder by using the mechanical solver was established. The paper compared the stairs stiffness and dynamic characteristics of the structure when the sliding support is arranged in different positions of the stairs. At the same time the design on different types of sliding bearing is summarized. The results show that the stairs which are represented of the model3,4 and 5 can reduce the impact of stairs to the structure. At the same time the problem on the bearing capacity,deformation and upwrap of the sliding end etc. is summarized.

关 键 词：楼梯 滑动支座 隔震垫 对比 

分 类 号：TU229[建筑科学—建筑设计及理论]