配筋砌体结构墙体出平面反应试验研究
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摘要
为研究配筋砌体结构出平面反应,将配筋砌块未注芯的孔灌注了高密度铁砂,以提高缩尺模型材料的等效密度,更真实地模拟墙体出平面惯性效应。利用推导的模型与原型的相似关系,设计并实施了振动台试验。结果表明,模型结构主要以压弯变形为主,在现行规范规定的构造措施下,足以抵抗设防地震造成的墙体出平面破坏。通过敲击试验得到墙体出平面振动频率,该频率相对较高,远离地震动卓越频率。相邻楼层出平面频率不完全相同,振动的相位可能时而同相,时而反相。
In order to study the out-of-plane responses,the simulation of the out-of-plane inertial responses of the wall under the influence of earthquake could be more real by means of potting the high-density cast iron particles in the hollow hole of the reinforced masonry to increase the equivalent density of the material in scale-down model.Based on the results of the similarity relations between the actual wall and the model wall,the earthquake simulating experiments on shaking table are conducted.The resuits show that the compression-bending deformation in the model structure is observed and the construction measures stipulated in current code have remarkable ability to prevent the out-of-plane damage to walls from the fortified earthquake.The wall out-of-plane frequency of vibration is obtained shaking by beating experiment.And the relatively high out-of-plane frequency of vibration is far from the earthquake predominant frequency.The out-of-plane vibration phase between adjacent floors is likely to be homophase or reversal of phase,because the out-of-plane vibration frequencies are various.
In order to study the out-of-plane responses,the simulation of the out-of-plane inertial responses of the wall under the influence of earthquake could be more real by means of potting the high-density cast iron particles in the hollow hole of the reinforced masonry to increase the equivalent density of the material in scale-down model.Based on the results of the similarity relations between the actual wall and the model wall,the earthquake simulating experiments on shaking table are conducted.The resuits show that the compression-bending deformation in the model structure is observed and the construction measures stipulated in current code have remarkable ability to prevent the out-of-plane damage to walls from the fortified earthquake.The wall out-of-plane frequency of vibration is obtained shaking by beating experiment.And the relatively high out-of-plane frequency of vibration is far from the earthquake predominant frequency.The out-of-plane vibration phase between adjacent floors is likely to be homophase or reversal of phase,because the out-of-plane vibration frequencies are various.
引文
[1]高本立.刚性边界砌体填充墙的平面外承载力[C]//99’全国砌体结构学术会议,中国杭州,1999.
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[3]周抚生,郭迅,郑志华,等.大开间小型混凝土砌块10层模型房屋抗震性能试验研究(Ⅱ)[J].地震工程与工程振动,2004,24(2):107-110.
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[5]Jocelyn P,Michel B,Andre F.Out-of-plane seismic evaluation and retrofit of turn-of-the-century North American masonry walls[J].Journal ofStructural Engineering,2001,127(5):561-569.
[6]唐岱新,龚绍熙,周炳章.砌体结构设计规范理解与应用[M].北京:中国建筑工业出版社,2002.
[7]Englekirk R E,Hart G C.Earthquake design of concrete masonry buildings[M].Volume 2:Strength Design of One-to Four-story Buildings,Prentice-Hall,Inc.,Englewood Cliffs,New Jersey,1984.
[2]周抚生,郭迅.大开间小型混凝土砌块10层模型房屋抗震性能试验研究(I)[J].地震工程与工程振动,2002,22(6):58-64.
[3]周抚生,郭迅,郑志华,等.大开间小型混凝土砌块10层模型房屋抗震性能试验研究(Ⅱ)[J].地震工程与工程振动,2004,24(2):107-110.
[4]张敏政.地震模拟实验中相似律应用的若干问题[J].地震工程与工程振动,1997,17(2):52-58.
[5]Jocelyn P,Michel B,Andre F.Out-of-plane seismic evaluation and retrofit of turn-of-the-century North American masonry walls[J].Journal ofStructural Engineering,2001,127(5):561-569.
[6]唐岱新,龚绍熙,周炳章.砌体结构设计规范理解与应用[M].北京:中国建筑工业出版社,2002.
[7]Englekirk R E,Hart G C.Earthquake design of concrete masonry buildings[M].Volume 2:Strength Design of One-to Four-story Buildings,Prentice-Hall,Inc.,Englewood Cliffs,New Jersey,1984.
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