钢筋混凝土楼梯抗震性能的影响因素分析
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摘要
对单层板式钢筋混凝土楼梯进行试验研究和有限元分析,在分析中考虑了梯段板厚度、坡度、钢筋布置形式三个因素对楼梯构件受力性能的影响。研究结果表明:对楼梯模型施加正向水平位移时,楼梯水平方向的刚度、承载力随梯段板厚度的增加而明显增大,随梯段板坡度的增加而明显降低。对楼梯模型施加反向水平位移时,梯段板厚度、坡度对楼梯水平方向的刚度及承载力几乎没有影响,梯段板上层纵筋贯通对楼梯的抗震性能更有利。
An experimental investigation and finite element analysis of single-layer of reinforced concrete were carried out.The effects of the bench plate thickness,slope and the arrangement type of reinforcement on mechanical behaviors of stairs components were analyzed.The study results showed that when forward horizontal displacement was applied to the stairs model displacement,the stairs horizontal stiffness and the bearing capacity increased obviously with the increase of the step board thickness,but reduced significantly with the increase of the slope.When the reverse horizontal displacement was applied to the stairs model,the ladder board thickness and the slope had little influence on the stairs horizontal stiffness and the bearing capacity of the staircase model.The staircase models with upper longitudinal reinforcement through bench plate were more favourable for seismic performance of stairs.
An experimental investigation and finite element analysis of single-layer of reinforced concrete were carried out.The effects of the bench plate thickness,slope and the arrangement type of reinforcement on mechanical behaviors of stairs components were analyzed.The study results showed that when forward horizontal displacement was applied to the stairs model displacement,the stairs horizontal stiffness and the bearing capacity increased obviously with the increase of the step board thickness,but reduced significantly with the increase of the slope.When the reverse horizontal displacement was applied to the stairs model,the ladder board thickness and the slope had little influence on the stairs horizontal stiffness and the bearing capacity of the staircase model.The staircase models with upper longitudinal reinforcement through bench plate were more favourable for seismic performance of stairs.
引文
[1]冯远,刘宜丰,肖克艰,等.来自汶川大地震亲历者的第一手资料——结构工程师的视界与思考[M].北京:中国建筑工业出版社,2009:218-229.
[2]苏启旺,蔡宏儒,李力.从“汶川大地震"引发对板式楼梯设计的思考[J].四川建筑科学研究,2008,34(4):165-167.
[3]王亚勇.汶川地震建筑震害启示——抗震概念设计[J].建筑结构学报,2008,29(4):20-25.
[4]尹保江,黄世敏,薛彦涛,等.汶川5.12地震框架-剪力墙结构震害调查与反思[J].工程抗震与加固改造,2008,30(4):37-40.
[5]GB 50011—2010建筑抗震设计规范[S].
[6]陈希,王淮峰,楼梦麟,等.框架结构中折板楼梯的抗震性能分析[J].同济大学学报,2011,39(5):643-649.
[7]冯远,吴小宾,李从春,等.现浇楼梯对框架结构的抗震影响分析与设计建议[J].土木工程学报,2010,43(10):53-62.
[8]代红军,祁皑.考虑楼梯影响的钢筋混凝土框架结构地震反应分析[J].福州大学学报,2010,38(2):101-109.
[2]苏启旺,蔡宏儒,李力.从“汶川大地震"引发对板式楼梯设计的思考[J].四川建筑科学研究,2008,34(4):165-167.
[3]王亚勇.汶川地震建筑震害启示——抗震概念设计[J].建筑结构学报,2008,29(4):20-25.
[4]尹保江,黄世敏,薛彦涛,等.汶川5.12地震框架-剪力墙结构震害调查与反思[J].工程抗震与加固改造,2008,30(4):37-40.
[5]GB 50011—2010建筑抗震设计规范[S].
[6]陈希,王淮峰,楼梦麟,等.框架结构中折板楼梯的抗震性能分析[J].同济大学学报,2011,39(5):643-649.
[7]冯远,吴小宾,李从春,等.现浇楼梯对框架结构的抗震影响分析与设计建议[J].土木工程学报,2010,43(10):53-62.
[8]代红军,祁皑.考虑楼梯影响的钢筋混凝土框架结构地震反应分析[J].福州大学学报,2010,38(2):101-109.
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