水平荷载作用下土与密肋复合墙结构相互作用的简化分析
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摘要
针对密肋复合墙结构特有的受力特点,将结构中的隐形外框架取为若干空间梁单元,把密肋复合墙板按等效斜压杆来处理,将上部结构简化为刚架-斜压杆模型,利用该模型建立了考虑地基弹性变形的密肋复合墙结构与其地基基础相互作用的整体分析模型,来分析其受水平荷载作用时的共同工作问题。研究结果表明:密肋复合墙结构刚架-斜压杆模型具有一定的理论性及准确性;考虑土与结构相互作用的影响以后,水平侧移随着地基刚度的增大而减小,基础结构承担的剪力逐渐向上部结构第一层转移,整个密肋复合墙结构的柔度随着地基刚度的增大而减小。计算结果表明:该计算模型可以为密肋复合墙结构与其基础地基的相互作用分析提供了一种可行的简化方法。
According to the unique characteristics of multi-ribbed slab structures,the invisible outside frames of the structure were taken as a number of spacial beam elements,the multi-ribbed composite walls were treated as equivalent oblique struts,and the upper structure was simplified as the model of rigid frame with diagonal structure.Using the finite element software,the entire model of soil-structure interaction was established to analyze the interaction under lateral load.The results show that: the model of rigid frame with diagonal structure has a certain accuracy.To consider the impact of soil-structure interaction,the horizontal displacements decrease with the foundation stiffness increasing,the shear forces that the infrastructure bears transfer to the first layer gradually.The flexibility of the entire multi-ribbed slab structure decreases with the foundation stiffness increasing.It is observed through computing example that the improved interaction-model is reasonable.A practicable simplified method for the global static analysis of multi-ribbed slab structures is thus presented.
According to the unique characteristics of multi-ribbed slab structures,the invisible outside frames of the structure were taken as a number of spacial beam elements,the multi-ribbed composite walls were treated as equivalent oblique struts,and the upper structure was simplified as the model of rigid frame with diagonal structure.Using the finite element software,the entire model of soil-structure interaction was established to analyze the interaction under lateral load.The results show that: the model of rigid frame with diagonal structure has a certain accuracy.To consider the impact of soil-structure interaction,the horizontal displacements decrease with the foundation stiffness increasing,the shear forces that the infrastructure bears transfer to the first layer gradually.The flexibility of the entire multi-ribbed slab structure decreases with the foundation stiffness increasing.It is observed through computing example that the improved interaction-model is reasonable.A practicable simplified method for the global static analysis of multi-ribbed slab structures is thus presented.
引文
[1]吕西林,陈跃庆,陈波,等.结构-地基动力相互作用体系振动台模型试验研究[J].地震工程与工程振动,2000,20(4):20-29.
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[4]西安建筑科技大学建筑工程新技术研究所.密肋壁板轻型框架结构理论与应用研究[R].科学技术研究报告,2000.
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[6]黄炜,陈国新,姚谦峰.密肋复合墙体在拟动力试验下的抗震性能研究[J].振动与冲击,2007,26(3):49-65.
[7]何明胜,姚谦峰,黄炜,等.横向荷载作用下密肋复合墙体计算模型及力学性能分析.地震工程与工程振动,2008,28(5):102-108.
[8]龚耀清.弹性地基上高层建筑结构及半解析法研究[M].银川:宁夏出版社,2000.
[9]赵冬.密肋壁板轻框结构受力性能分析及计算方法研究[D].西安:西安建筑科技大学,2001.
[10]田英侠,陈平,姚谦峰,等.密肋复合墙板等效弹性常数计算方法研究[J].工业建筑,2003,33(1):10-12.
[11]DBJ/T61-43-2006密肋复合墙结构技术规程陕西省工程建设标准[S].
[2]李培振,吕西林.考虑土-结构相互作用的高层建筑抗震分析[J].地震工程与工程振动,2004,24(3):130-138.
[3]方志,陆浩亮,王龙.土-结构动力相互作用研究综述[J].世界地震工程,2006,22(1):58-62.
[4]西安建筑科技大学建筑工程新技术研究所.密肋壁板轻型框架结构理论与应用研究[R].科学技术研究报告,2000.
[5]姚谦峰,黄炜,田洁,等.密肋复合墙体受力机理及抗震性能试验研究[J].建筑结构学报,2004,25(6):67-74.
[6]黄炜,陈国新,姚谦峰.密肋复合墙体在拟动力试验下的抗震性能研究[J].振动与冲击,2007,26(3):49-65.
[7]何明胜,姚谦峰,黄炜,等.横向荷载作用下密肋复合墙体计算模型及力学性能分析.地震工程与工程振动,2008,28(5):102-108.
[8]龚耀清.弹性地基上高层建筑结构及半解析法研究[M].银川:宁夏出版社,2000.
[9]赵冬.密肋壁板轻框结构受力性能分析及计算方法研究[D].西安:西安建筑科技大学,2001.
[10]田英侠,陈平,姚谦峰,等.密肋复合墙板等效弹性常数计算方法研究[J].工业建筑,2003,33(1):10-12.
[11]DBJ/T61-43-2006密肋复合墙结构技术规程陕西省工程建设标准[S].
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