建筑结构

2008, No.297(09) 113-115+119

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预应力框架梁端延性分析及配筋限值探讨
Analysis of Ductility of PC Beam and Discussion on Limiting the Ratio of Longitudinal Reinforcement

郑毅敏;朱伟平;
Zheng Yimin~1,Zhu Weiping~2(1 Architectural Design & Research Institute,2 Department of Building Engineering,Tongji University,Shanghai 200092,China)

摘要(Abstract):

预应力混凝土框架抗震设计中,经常需通过增大梁断面来满足规范中梁端受拉纵筋配筋率的限值,从而制约了预应力梁在抗震结构中的应用。通过对部分预应力混凝土梁在抗震设计中的延性分析,深入探讨各种因素特别是梁端纵筋配筋率对延性的影响。分析结果表明当配筋率超过规范限值时延性变化并不显著,建议以实际配筋率作为限值以利于预应力结构的推广使用。
In the aseismic design of prestressed concrete frame,designers often have to enlarge the section of beams in order to meet the limitaition of the ratio of the longitudinal reinforcement in code.By analyzing the ductility of partial prestressed concrete beams in aseismic design,it discusses that the effect of some factors,especially the ratio of longitudinal reinforcement,to ductility. The result indicates that when the ratio exceeds the limintation in code,ductility changes little.So it is suggested that the real ratio be the limitation to promote the use of prestressed concrete.

关键词(KeyWords): 规范;框架抗震设计;延性;梁端配筋率;预应力度
code;aseismic design of frame;ductility;longitudinal reinforcement ratio;partial prestressing ratio

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 郑毅敏;朱伟平;
Zheng Yimin~1,Zhu Weiping~2(1 Architectural Design & Research Institute,2 Department of Building Engineering,Tongji University,Shanghai 200092,China)

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DOI: 10.19701/j.jzjg.2008.09.031

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