不同比例钢-混凝土混合结构高层建筑动力相似关系试验研究
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摘要
模型试验的动力相似理论是结构抗震试验技术中的一个基础性研究课题。本文设计实现了1/10、1/20和1/30三个不同比例的钢-混凝土混合结构高层建筑的振动台模型试验。通过对三个模型试验结果的对比研究,对钢-混凝土混合结构高层建筑的动力相似关系进行了初步探讨。试验结果表明,按照本文的动力模型的设计施工及试验要求进行的不同比例钢-混凝土混合结构高层建筑的振动台试验,在自振频率、振型、加速度放大系数、楼层最大位移、楼层剪力等动力特性和动力反应方面具有较好的相似性。试验结果一方面说明对这三个模型采用的动力相似关系和制作方法是合理的,另一方面也说明了对钢-混凝土混合结构房屋采用较小的1/30比例进行振动台试验是可行的。
Dynamic similitude theory of model tests is a basic research topic in seismic test technique for engineering structures.Shaking table model tests of three different models with the scale factor of 1/10,1/20 and 1/30 are designed and implemented in this paper.By comparing the results of these three model tests,the dynamic similitude relationship of steel-concrete hybrid structures for highrise buildings are discussed preliminarily.The similitude properties of the three test models,such as vibration frequency,vibration shape,amplification factor of acceleration,storey maximum displacement and storey maximum shear force are good when the design,construction and arrangement of shaking table model tests are done in this paper.It can be concluded that both the dynamic similitude relationship and construction method for these three models are reasonable.It can also be concluded that the 1/30,smaller similitude scale factor for steel-concrete hybrid structure for highrise building is reasonable from the test results.
Dynamic similitude theory of model tests is a basic research topic in seismic test technique for engineering structures.Shaking table model tests of three different models with the scale factor of 1/10,1/20 and 1/30 are designed and implemented in this paper.By comparing the results of these three model tests,the dynamic similitude relationship of steel-concrete hybrid structures for highrise buildings are discussed preliminarily.The similitude properties of the three test models,such as vibration frequency,vibration shape,amplification factor of acceleration,storey maximum displacement and storey maximum shear force are good when the design,construction and arrangement of shaking table model tests are done in this paper.It can be concluded that both the dynamic similitude relationship and construction method for these three models are reasonable.It can also be concluded that the 1/30,smaller similitude scale factor for steel-concrete hybrid structure for highrise building is reasonable from the test results.
引文
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[2]Nam-Sik KIM.An equivalent multi-phase similitude law for pseudodynamic test on small-scale R/C models[C]//.13WCEE,Canada,2004.
[3]吕西林.复杂高层建筑抗震理论与应用[M].北京:科学出版社.2007:30-35.
[4]陆秀丽,张晓光,蒋志贤.某超高层建筑结构方案设计[J].结构工程师,1998,14(1):30-35.
[5]郑浩,王全凤.对外钢框架-核心筒结构的初步探讨[J].福建建筑,2000,6(3):24-26.
[6]张令心,郭丰雨.钢-混凝土混合结构抗震研究述评[J].地震工程与工程振动,2004,24(3):51-56.
[7]龚炳年,郝锐坤,赵宁.钢-混凝土混合结构模型动力特性的试验研究[J].建筑结构学报,1995,16(3):38-43.
[8]李国强,周向明,丁翔.高层建筑钢-混凝土混合结构模型模拟地震振动台试验研究[J].建筑结构学报,2001,22(4):2-6.
[9]龚治国,吕西林,卢文胜.混合结构体系高层建筑模拟地震振动台试验研究[J].地震工程与工程振动,2004,24(4):99-105.
[10]武敏刚,吕西林.混合结构振动台模型试验研究与计算分析[J].地震工程与工程振动,2004,24(6):103-108.
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