Y形偏心支撑高强钢框架整体结构抗震性能分析

王峥; 李慎

doi:10.3724/j.gyjzG21091704

Y形偏心支撑高强钢框架整体结构抗震性能分析

doi: 10.3724/j.gyjzG21091704

王峥¹,
李慎^2, ,

1. 西安铁路职业技术学院, 西安 710600;
2. 西安理工大学土木建筑工程学院, 西安 710048

基金项目:

陕西省教育厅专项科研计划(20JK0861)。

陕西省自然科学研究计划(2021JM-330)

详细信息

作者简介:
王峥,讲师,主要从事结构抗震的研究,3w-119@163.com。

通讯作者:
李慎，讲师，主要从事钢结构和新型结构抗震的研究，lishen2861@163.com。

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- 被引次数: 0
出版历程
- 收稿日期: 2021-09-17
- 网络出版日期: 2024-08-16

Seismic Performance Analysis of High-Strength Steel Frames with Y-Shaped Eccentrically Braces

WANG Zheng¹,
LI Shen^{2
, ,}

1 Xi'an Railway Vocational and Technical Institute, Xi'an 710600, China;
2. School of Civil Engineering and Architecture, Xi'an University of Technology, Xi'an 710048, China

摘要

摘要: Y形偏心支撑高强钢框架结构中耗能梁段竖向布置,与框架梁是独立的两个构件,截面设计更加灵活,且塑性变形对框架梁和楼板影响较小,易于震后修复。结构设计中耗能梁段设计为屈服点低于345 MPa的普通钢材,以保证整体结构具有较好的延性与耗能;框架梁、柱等非耗能构件设计为高强度钢材,如Q460或Q690,在保证非耗能构件的弹性受力状态基础上降低构件截面尺寸。耗能梁段长度和结构层数(结构高度)是影响该结构性能的主要因素,考虑两种因素的影响,通过性能化设计方法设计了8,12,16层三组Y形偏心支撑高强钢框架原型结构,每组耗能梁段长度包括700,900,1 100 mm,共计9个模型。通过Pushover分析和动力弹塑性分析,研究了耗能梁段长度和结构层数对结构的破坏模式、刚度、层间侧移角分布、耗能梁段转角变形等影响。研究结果表明:耗能梁段越长,结构的抗侧刚度越弱;所有结构的层间侧移角和耗能梁段转角变形具有类似的分布模式。
- 耗能梁段 /
- 结构层数 /
- Y形偏心支撑 /
- 高强钢 /
- 层间侧移
Abstract: In the high-strength steel frame with Y-shaped eccentrically braces, the energy-consuming beam, which called links, are arranged vertically, and the frame beams are two independent members, so the cross-sectional design is more flexible, and the plastic deformation has less impact on the frame beams and floor slabs, which is easy to repair after the earthquake. The energy-consuming beam sections were designed as ordinary steel with a yield point below 345 MPa to ensure good ductility and energy consumption of the overall structure, while the non-energy-consuming members such as frame beams and columns were designed as high-strength steels, such as Q460 or Q690, to reduce the cross-sectional size of the members ensuring the elastic stress state of the non-energy-consuming members. The length of the links and the number of storeys (height of the structure) were the main factors affecting the performance of the structure. Three sets of prototype structures of high-strength steel frames with Y-shaped eccentric braces with 8, 12 and 16 storeys were designed by the performance-based design method, with each set of link length varying from 700 mm, 900 mm and 1 100 mm, for a total of nine models. The effects of the length of the links and the number of storeys on the failure mode, stiffness, distribution of storey drift and link rotation were investigated by Pushover analysis and dynamic elastoplastic analysis. The results showed that the longer the links, the weaker the lateral stiffness of the structures; the storey drift and the link rotation showed similar distribution patterns for all structures.
- link /
- storey number /
- Y-shaped eccentrically braced steel frames /
- high-strength steel /
- storey drift

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参考文献(19)

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