拉链柱式中心支撑钢框架支撑设计方法研究

为探讨拉链柱式中心支撑钢框架结构中支撑设计时是否需要考虑受循环荷载时的强度降低系数（ψ）,本文参照悬挂拉链柱式中心支撑钢框架结构的设计方法,设计了对比算例,其中支撑分别按考虑与不考虑受循环荷载时的强度降低系数设计,并对算例的自振特性、用钢量、多遇及罕遇地震下的动力响应等指标进行了分析比较.结果表明：两类算例的动力响应类似,均可满足抗震规范GB 50011“小震不坏”、“大震不倒”的抗震设防目标.因支撑设计时不考虑受循环荷载强度降低系数的算例用钢量较少,综合抗震性能较优,建议支撑设计时不考虑受循环荷载时的强度降低系数.分析也指出,悬挂拉链柱式中心支撑钢框架结构中的拉链柱设计方法偏保守,更为合理的...

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Bibliographic Details
Published in河北科技大学学报 Vol. 35; no. 5; pp. 466 - 472
Main Author 王天涯 于海丰 张岩
Format Journal Article
LanguageChinese
Published 河北科技大学建筑工程学院,河北石家庄,050018 2014
Subjects
中心支撑钢框架
强度降低系数
抗震性能
拉链柱
支撑
中心支撑钢框架
抗震性能
zipper frames
zipper struts
拉链柱
strength reducing factor
brace
seismic performance
强度降低系数
支撑
Online AccessGet full text
ISSN1008-1542
DOI10.7535/hbkd.2014yx05010

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Summary:为探讨拉链柱式中心支撑钢框架结构中支撑设计时是否需要考虑受循环荷载时的强度降低系数（ψ）,本文参照悬挂拉链柱式中心支撑钢框架结构的设计方法,设计了对比算例,其中支撑分别按考虑与不考虑受循环荷载时的强度降低系数设计,并对算例的自振特性、用钢量、多遇及罕遇地震下的动力响应等指标进行了分析比较.结果表明：两类算例的动力响应类似,均可满足抗震规范GB 50011“小震不坏”、“大震不倒”的抗震设防目标.因支撑设计时不考虑受循环荷载强度降低系数的算例用钢量较少,综合抗震性能较优,建议支撑设计时不考虑受循环荷载时的强度降低系数.分析也指出,悬挂拉链柱式中心支撑钢框架结构中的拉链柱设计方法偏保守,更为合理的拉链柱设计方法有待提出.
Bibliography:WANG Tianya, YU Haifeng, ZHANG Yan （School of Civil Engineering, Hebei University of Science and Technology, Shijiazhuang Hebei 050018, China）
In order to investigate whether the compression reduction factor ψb under cyclic load is needed in the brace design of zipper frames, numerical models, in which the braces are respectively designed with and without considering the reduction fac- tor ψ , are designed according to the design method of suspended zipper frames. Some indexes, including the natural periods, steel consumption and dynamic response under frequent and rare earthquakes, are analyzed and compared. The results show that the dynamic responses of the two struts are similar to each other and both of them can meet the requirement of ＂no-damage under frequent earthquake＂ and ＂no-collapse under rare earthquake＂ required by the GB 50011 code. Because the steel con- sumption in the zipper frames design without considering the reduction factor ψb under cyclic loading is less, and comprehensive anti-seismic p
ISSN:1008-1542
DOI:10.7535/hbkd.2014yx05010