地基不均匀沉降对上部结构内力和变形的影响
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摘要
应用有限元软件ANSYS研究了地基基础不均匀沉降对上部结构内力和变形的影响.将结构的柱脚和支座简化为固定端,通过在不同的支座处预先施加给定的位移,来模拟分析地基基础不均匀沉降的影响.以深圳市少年宫“水晶石大厅”为例,研究了几种典型情况.分析表明,地基不均匀沉降方式及沉降量的大小对上部结构内力和变形有显著影响,且结构物的柱距直接影响柱的轴力.
The influences on deformation and internal forces of the superstructure caused by ground unequal settlement are analyzed by using the finite element software ANSYS. The unequal settlement affections are simulated by some fixed ends with their displacements given. The Crystal Stone Lobby of Juvenile Palace in Shenzhen is calculated as an example. Several cases are studied, and the results show that the unequal settlement of the basement effects the deformation and internal forces of the superstructure. And the axial force of the column relates with the distance between them.
The influences on deformation and internal forces of the superstructure caused by ground unequal settlement are analyzed by using the finite element software ANSYS. The unequal settlement affections are simulated by some fixed ends with their displacements given. The Crystal Stone Lobby of Juvenile Palace in Shenzhen is calculated as an example. Several cases are studied, and the results show that the unequal settlement of the basement effects the deformation and internal forces of the superstructure. And the axial force of the column relates with the distance between them.
引文
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[4]陈波,吕西林,李培振,等.用ANSYS模拟结构-地基动力相互作用振动台试验的建模方法[J].地震工程与工程振动,2002,22(1):126-131.CHEN Bo, LU Xi-lin, LI Pei-zhen, et al. Modeling of dynamic soil-structure interaction by ANSYS program[J].Earthquake Engi-neering and Engineering Vibration,2002,22(1):126-131.
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[6] GB 50007-2002,建筑地基基础设计规范[S].GB 50007-2002, Code for design of building foundation[S].
[7] GB 50009-2001,建筑结构荷载规范[S].GB 50009-2001,Code for load of building structures[S].
[8] GB 50017-2003,钢结构设计规范[S].GB 50017-2003, Code for design of steel structures[S].
[2]尹,樊琨.基于人工神经网络的建筑物软基沉降预测[J].宁波大学学报(自然科学版),2003,16(2):164-168.YIN Jun, FAN Kun. Prediction of settlement of weak building ground based on artificial neural networks[J].Journal ofNingbo U-niversity(Natural Science Edition),2003,16(2):164-168.
[3]黄襄云,周福霖,徐忠根,等.一座混合空间结构地震模拟试验设计及抗震性能分析[J].华南建设学院西院学报,2000,8(1):11-19.HUANG Xiang-yun, ZHOU Fu-lin, XU Zhong-gen, et al. Design for seismic simulation experiment and analysis of earthquake re-sistant behavior on a compositive space structure model[J].Journal ofSouth China Construction University( West Compus),2000,8(1):11-19.
[4]陈波,吕西林,李培振,等.用ANSYS模拟结构-地基动力相互作用振动台试验的建模方法[J].地震工程与工程振动,2002,22(1):126-131.CHEN Bo, LU Xi-lin, LI Pei-zhen, et al. Modeling of dynamic soil-structure interaction by ANSYS program[J].Earthquake Engi-neering and Engineering Vibration,2002,22(1):126-131.
[5]刘畅,郑刚.地基不均匀沉降对上部结构影响的弹性支承分析法[J].建筑结构学报,2004,25(4):124-128.LIU Chang, ZHENG Gang. Anlysis of the influence of ground unequal settlement on the structure with elastic support model method[J].Journal of Building Structures,2004,25(4):124-128.
[6] GB 50007-2002,建筑地基基础设计规范[S].GB 50007-2002, Code for design of building foundation[S].
[7] GB 50009-2001,建筑结构荷载规范[S].GB 50009-2001,Code for load of building structures[S].
[8] GB 50017-2003,钢结构设计规范[S].GB 50017-2003, Code for design of steel structures[S].
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