高层建筑风载荷与地震作用响应的对比分析
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摘要
选取在抗震设防烈度为6度、基本风压为0.45kN·m-2地区的一个钢筋混凝土框架结构,基于ANSYS有限元平台,分别对其施加风载荷和地震作用.风载荷采用线性滤波法进行模拟,地震波选取EI-Centro波后进行调幅得到,选取结构基底剪力与弯矩、顶层位移、层间位移和顶层加速度等进行对比分析.结果表明:在上述地区按照抗风设计的高层钢筋混凝土框架结构可以抵御该地区的多遇地震,而框架-剪力墙结构、剪力墙结构由地震控制的可能性很大;对于结构舒适度问题,根据每个结构形式的适用高度,可以认为框架结构应重点考虑地震作用,而剪力墙结构、筒体结构、框筒结构等应重点考虑风载荷影响.
A reinforced concrete frame structure in the area that seismic fortification intensity is six and basic wind pressure is 0.45kN·m-2 is selected in this paper,and wind and earthquake action are imposed to it respectively on ANSYS platform.Simulating wind uses the linear filtering method,and selecting EI-Centro wave to amplitude modulation can acquire earthquake wave.Base shear and moment,top floor displacement,story drift and top floor acceleration are selected to be compared and analyzed.Results show that the high-rise reinforced concrete frame structure according to wind resistance design can resist more severe earthquake in the region,but the possibility of that earthquake is dominant to the frame-shear wall structure and the shear wall structure is very large;To human comfort problem,it can be thought that frame structure should focus on the earthquake action according to the suitable height of each structure,but the shear wall structure and tube structure should focus on wind.
A reinforced concrete frame structure in the area that seismic fortification intensity is six and basic wind pressure is 0.45kN·m-2 is selected in this paper,and wind and earthquake action are imposed to it respectively on ANSYS platform.Simulating wind uses the linear filtering method,and selecting EI-Centro wave to amplitude modulation can acquire earthquake wave.Base shear and moment,top floor displacement,story drift and top floor acceleration are selected to be compared and analyzed.Results show that the high-rise reinforced concrete frame structure according to wind resistance design can resist more severe earthquake in the region,but the possibility of that earthquake is dominant to the frame-shear wall structure and the shear wall structure is very large;To human comfort problem,it can be thought that frame structure should focus on the earthquake action according to the suitable height of each structure,but the shear wall structure and tube structure should focus on wind.
引文
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[8]张田,夏禾,郭薇薇.基于多维AR模型的桥梁随机风场模拟[J].中南大学学报:自然科学版,2012,43(3):1114-1121.
[9]XU Zhaodong,WANG Dengxiang,WU Keyi.Simulation of stochastic wind field for large complex structures based on modified Fourier spectrum[J].J Zhejiang Univ:Sci A,2011,12(3):238-246.
[10]PHOON K K,QUEK S T,HUANG Hongwei.Simulation of non-Gaussian processes using fractile correlation[J].Proba Eng Mech,2004,19(4):287-292.
[2]DUTHINH D,SIMIU E.Safety of structures in strong winds and earthquakes:multihazard considerations[J].J Struct Eng,2010,136(3):330-333.
[3]武黎明.高层建筑考虑脉动风荷载作用下的有限元分析[J].四川建筑,2011,31(3):119-122.
[4]沈飞,楼梦麟.超高层建筑地震反应中高阶振型影响分析[J].工程力学,2012,29(S1):23-28.
[5]洪小健,顾明.基于规范的上海高层建筑风和地震作用的比较[J].同济大学学报:自然科学版,2005,33(10):1291-1296.
[6]冷元,范存新,唐和生.基于规范的高层建筑风与地震作用的简明对比[J].扬州大学学报:自然科学版,2012,15(4):74-78.
[7]LUO Jujie,SU Cheng,HAN Dajian.A simulation methodology of the stationary non-Gaussian stochastic wind pressure field[J].Proba Eng Mech,2012,30:77-88.
[8]张田,夏禾,郭薇薇.基于多维AR模型的桥梁随机风场模拟[J].中南大学学报:自然科学版,2012,43(3):1114-1121.
[9]XU Zhaodong,WANG Dengxiang,WU Keyi.Simulation of stochastic wind field for large complex structures based on modified Fourier spectrum[J].J Zhejiang Univ:Sci A,2011,12(3):238-246.
[10]PHOON K K,QUEK S T,HUANG Hongwei.Simulation of non-Gaussian processes using fractile correlation[J].Proba Eng Mech,2004,19(4):287-292.
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