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中南大学学报(自然科学版)

Journal of Central South University

第47卷    第7期    总第263期    2016年7月

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文章编号:1672-7207(2016)07-2476-09
钢框架结构基于能量的塑性设计方法
胡淑军1,王湛2

(1. 南昌大学 建筑工程学院,江西 南昌,330031;
2. 华南理工大学 亚热带建筑科学国家重点实验室,广东 广州,510640
)

摘 要: 以“强柱弱梁”的屈服机理为前提,结合建筑抗震设计规范和能量平衡原理得到结构的基底剪力和各楼层的剪力,提出钢框架结构基于能量的塑性设计方法。该方法还需预先确定结构在罕遇地震下的目标位移和耗能折减系数η,并通过塑性设计法对各构件进行设计。利用Perform-3D软件对所设计结构进行非线性动力时程分析。研究结果表明:该方法可设计不同抗震设防烈度下的钢框架结构,且无需进行复杂的计算和迭代,就能使结构满足多遇及罕遇地震下的预定功能。

 

关键词: 钢框架;能量平衡;塑性设计;屈服机理;耗能折减系数

Study of energy-based plastic design method on steel frame structures
HU Shujun1, WANG Zhan2

1. School of Civil Engineering and Architecture, Nanchang University, Nanchang 330031, China;
2. State Key Laboratory of Subtropical Building Science, South China University of Technology,
Guangzhou 510640, China

Abstract:The energy-based plastic design method of steel frame structures was proposed based on the ‘strong column weak beam’ energy dissipation and yield mechanism under the inelastic seismic behaviors. The base shear and lateral force distribution were derived from modified energy balance equation and the code for seismic design of buildings. Moreover, the pre-selected target drift and the reduced energy dissipation coefficient η were also important to the proposed method, and all the elements were obtained by plastic design method. Nonlinear dynamic time-history analysis was carried out by Perform-3D. The results show that the frames with different seismic precautionary intensities designed by the proposed method can exhibit expected functions during frequent and rare earthquake without complicated iteration and calculation.

 

Key words: steel frame; energy balance; plastic design; yield mechanism; reduced energy dissipation coefficient

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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