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[1]常莹莹,贡金鑫.钢筋混凝土受弯构件的延性及弯矩重分布[J].建筑科学与工程学报,2010,27(02):38-44.
　CHANG Ying-ying,GONG Jin-xin.Ductility and Moment Redistribution of Reinforced Concrete Flexural Members[J].Journal of Architecture and Civil Engineering,2010,27(02):38-44.
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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:
27卷
期数:
2010年02期
页码:
38-44
栏目:
出版日期:
2010-06-20

文章信息/Info

Title:
Ductility and Moment Redistribution of Reinforced Concrete Flexural Members
作者:
常莹莹,贡金鑫
大连理工大学 建设工程学部,辽宁 大连 116024
Author(s):
CHANG Ying-ying, GONG Jin-xin
Faculty of Infrastructure Engineering, Dalian University ofTechnology, Dalian 116024, Liaoning, China
关键词:
钢筋混凝土;  受弯构件;  延性;  弯矩重分布;  配筋率
Keywords:
reinforced concrete;  flexural member;  ductility;  moment redistribution;  reinforcement ratio
分类号:
TU375.1
DOI:
-
文献标志码:
A
摘要:
研究了钢筋混凝土受弯构件延性系数和塑性铰转动能力的计算方法,给出了受拉钢筋屈服和混凝土达到极限压应变或受拉钢筋达到极限拉应变时混凝土受压区高度的计算公式,在此基础上,比较了中国规范、美国规范和欧洲规范规定的最小和最大纵向钢筋配筋率范围内构件的塑性铰转动能力,分析了塑性弯矩重分布系数与相对受压区高度的关系。研究结果表明:由于中国规范规定的最大纵向钢筋配筋率对应于界限破坏,构件配筋率达到最大配筋率时构件已经不具有塑性变形能力,即使没有达到最大配筋率,变形能力也不大。
Abstract:
The method for calculating the ductility coefficient and plastic hinge rotation capacity of the reinforced concrete flexural members was investigated, and the calculation formulas for determining the depth of compression zone when tension steel yielded and concrete strain reached ultimate compressive strain or steel strain reached ultimate tensile strain were given. On the basis of these, the plastic rotation capacities of members in the range of minimum and maximum reinforcement ratios of longitudinal steel specified in Chinese, American and European codes were compared. The relations between the coefficients of plastic moment redistribution and relative depths of compression zone were studied. Research results show that the member hasn't any plastic deformation capacity in the case of maximum reinforcement ratio specified in Chinese codes, for this corresponds to the balanced failure, and the deformation capacity is less even not the case of maximum reinforcement ratio.

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备注/Memo

备注/Memo:
收稿日期:2010-03-25
基金项目:“十一五”国家科技支撑计划项目(2006BAJ01B06-06)
作者简介:常莹莹(1986-),女,河南商丘人,工学硕士研究生,E-mail:changyingying86@163.com。
更新日期/Last Update: 2010-06-20