板式楼梯设计参数分析及端平台对楼梯结构的影响  

Analysis on Design Parameters of Concrete Slab Stairs and the Influence of the End Platform on Stairs Structure

作　　者：胡隆德 黑晓丹 孙海峰 Hu Longde;Hei Xiaodan;Sun Haifeng(China State Construction Engineering Corporation AECOM Consultants Co.,Ltd.,Lanzhou 730050,China)

机构地区：[1]中国市政工程西北设计研究院有限公司,兰州730050

出　　处：《特种结构》2024年第6期12-17,25,共7页Special Structures

基　　金：中国市政工程西北设计研究院有限公司科研项目(XBSZKY2320)。

摘　　要：为研究楼梯端平台对楼梯计算挠度及应力分布的影响,对楼梯设计理论进行分析,根据建筑标准图集对板式楼梯的分类,利用有限元分析软件ANSYS对AT、BT、CT、DT四种板式楼梯进行数值模拟。通过对不同端平台尺寸、梯板厚度、荷载作用与板式楼梯计算挠度和受力性能的分析,得到挠度是控制楼梯设计的关键因素,在楼梯设计过程中宜对楼梯挠度进行修正,使得设计更为合理。AT与DT型板式楼梯最大挠度值接近,BT与CT型挠度值接近。随着端平台尺寸的增加,楼梯挠度减小,楼梯支座处混凝土应力分布发生变化。To study the influence of stair end platforms on the deflection and stress distribution of stairs,and analyze the design theory of staircase,according to the classification of slab staircases in the building standard drawings,the finite element software ANSYS was utilized to simulate four slab stairs:AT,BT,CT,and DT.With dfferent end platform sizes,various stair slab thicknesses,and diverse load types,the deflection and stress performance of slab stairs was analyzed.The results showed that the deflection was a key factor in controlling staircase design.It was advisable to correct the deflection of stairs during the design process to make the design more reasonable.The maximum deflections of AT and the DT type slab staircase were close,while thedeflections of BT and CT type were close.With the size of the end platform increasing,the staircase deflection decreased,and the concrete stress distribution at the stair support changed.

关 键 词：板式楼梯 端平台 挠度修正 应力分布 

分 类 号：TU375.2[建筑科学—结构工程]