某地下室筏板柱下墩的优化设计
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摘要
本文以带柱下墩的平板式筏板基础为例,在进行某地下室筏板柱下墩有限元分析时,利用地质勘察报告中的参数计算基础实际沉降,从而反推等效基床系数K,结合K值采用弹性地基梁板法对筏板进行有限元分析。同时对该基础采用倒楼盖法进行有限元分析,就这两种方法计算得到的配筋进行比较,并在保证一些参数不变的前提下,观察柱墩厚度的变化对筏板内力分布和配筋的影响。分析表明,适当增加柱墩厚度能优化筏板的配筋。
This paper takes the flat raft basement of under column pier as an example. When the finite elements of raft column pier is analyzed, the basic actual settlement is calculated geological with data from survey to inverse the coefficient of subgrade reaction K and the beam on elastic foundation method is adopted to make finite element analysis on valve plate. In the meantime, the inverted floor calculation method based on the assumption of rigid upper structure is employed.The two reinforcing bars from above methods are compared. Under the premise that some parameters are unchanged, the effect on internal force distribution of valve plate and reinforcing bars from the change of column pier thickness is observed. The analysis indicates that the raft's reinforcement can be optimized through the proper enhancement of the thickness of column pier.
This paper takes the flat raft basement of under column pier as an example. When the finite elements of raft column pier is analyzed, the basic actual settlement is calculated geological with data from survey to inverse the coefficient of subgrade reaction K and the beam on elastic foundation method is adopted to make finite element analysis on valve plate. In the meantime, the inverted floor calculation method based on the assumption of rigid upper structure is employed.The two reinforcing bars from above methods are compared. Under the premise that some parameters are unchanged, the effect on internal force distribution of valve plate and reinforcing bars from the change of column pier thickness is observed. The analysis indicates that the raft's reinforcement can be optimized through the proper enhancement of the thickness of column pier.
引文
[1]中国建筑科学研究院PKPM工程部.JCCAD用户手册及技术条件[S].北京:中国建筑科学研究院,2013.
[2]中国建筑科学研究院.建筑地基基础设计规范:GB50007-2011[S].北京:中国建筑工业出版社,2011.
[3]TERZAGHI K.Evaluation of coefficient of subgrade reaction[J].Geotechnique,1955,5(4):297-326.
[4]朱聘儒.双向板无梁楼盖[M].北京:中国建筑工业出版社,1999.
[5]中国建筑科学研究院.高层建筑筏形与箱形与筏形基础技术规范:JGJ6-2011[S].北京:中国建筑工业出版社,1999.
[6]黄昌乾,李国强,潘启辉.基床系数取值方法相关问题分析[J].建筑结构,2010,4(40):298-302.
[7]朱炳寅.高层建筑筏基设计方法的分析与探索[J].建筑结构.1999,10(04):54-57.
[8]李兰.高层建筑结构筏板基础设计与研究[D].合肥:合肥工业大学,2007.
[9]李海峰,陈晓平.高层建筑桩筏基础优化设计研究[J].岩土力学,1998(03):59-64.
[10]林磊.柱帽平板式筏板设计建议[J].建筑结构.2012,12(43):135-138.
[11]陈育尹,陈家友.平板式筏基计算方法的改进和简化K[J].建筑结构.2003(3):25-28.
[12]尚泽宇.无梁楼盖计算方法的研究[D].天津:天津大学,2014.
[13]陆海燕,邢彤,鲍文博,等.某高层剪力墙结构筏板基础优化设计[J].建筑结构,2014(17):79-82.
[2]中国建筑科学研究院.建筑地基基础设计规范:GB50007-2011[S].北京:中国建筑工业出版社,2011.
[3]TERZAGHI K.Evaluation of coefficient of subgrade reaction[J].Geotechnique,1955,5(4):297-326.
[4]朱聘儒.双向板无梁楼盖[M].北京:中国建筑工业出版社,1999.
[5]中国建筑科学研究院.高层建筑筏形与箱形与筏形基础技术规范:JGJ6-2011[S].北京:中国建筑工业出版社,1999.
[6]黄昌乾,李国强,潘启辉.基床系数取值方法相关问题分析[J].建筑结构,2010,4(40):298-302.
[7]朱炳寅.高层建筑筏基设计方法的分析与探索[J].建筑结构.1999,10(04):54-57.
[8]李兰.高层建筑结构筏板基础设计与研究[D].合肥:合肥工业大学,2007.
[9]李海峰,陈晓平.高层建筑桩筏基础优化设计研究[J].岩土力学,1998(03):59-64.
[10]林磊.柱帽平板式筏板设计建议[J].建筑结构.2012,12(43):135-138.
[11]陈育尹,陈家友.平板式筏基计算方法的改进和简化K[J].建筑结构.2003(3):25-28.
[12]尚泽宇.无梁楼盖计算方法的研究[D].天津:天津大学,2014.
[13]陆海燕,邢彤,鲍文博,等.某高层剪力墙结构筏板基础优化设计[J].建筑结构,2014(17):79-82.