摘要
跨度较大的折板楼梯挠度较大、经济性较差,可以通过在折板楼梯的梯口附近设置扁梁,与周边框架柱构成横向框架-扁梁体系来控制折板挠度。结合工程实例,利用空间有限元计算软件Midas建立考虑材料非线性的折板楼梯模型,对未设扁梁的折板楼梯与设置扁梁的折板楼梯进行计算分析,得出,横向框架-扁梁体系对折板起到了弹性支座的作用,大大降低了折板的内力和位移,减少了配筋面积,使设计更加经济、可靠。
In many case,a large span stair plate always uneconomically brings about a large deflection. By setting a flat beam in the end of stair tread should effectively control the deflection. In the article,using the spatial element software MIDAS to analyse two stair models which one is setted a plate beam and the other is not,it draws a conclusion that the flat beam can play a important role in the structure as an elastic support for the tread. Meanwhile,the flat beam makes a great efficiency on reducing the plate stress、displacement,cutting down the reinforcing bars and makes the stair structure more reliable and economical.
出处
《福建建筑》
2014年第11期61-63,共3页
Fujian Architecture & Construction
关键词
材料非线性
板式楼梯
扁梁—框架体系
弹性支座
Material nonlinear
Plate stair
Flat beam frame structure
Elastic support
