[1]张根俞,梁书亭,朱筱俊,等.考虑约束效应的型钢混凝土梁抗弯承载力计算分析[J].东南大学学报(自然科学版),2009,39(3):569-573.[doi:10.3969/j.issn.1001-0505.2009.03.028]
 Zhang Genyu,Liang Shuting,Zhu Xiaojun,et al.Analysis on bend bearing capacity of steel-encased concrete beams considering the effect of confinement[J].Journal of Southeast University (Natural Science Edition),2009,39(3):569-573.[doi:10.3969/j.issn.1001-0505.2009.03.028]
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考虑约束效应的型钢混凝土梁抗弯承载力计算分析()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
39
期数:
2009年第3期
页码:
569-573
栏目:
土木工程
出版日期:
2009-05-20

文章信息/Info

Title:
Analysis on bend bearing capacity of steel-encased concrete beams considering the effect of confinement
作者:
张根俞1 梁书亭1 朱筱俊2 覃志尚1
1 东南大学土木工程学院, 南京 210096; 2 东南大学建筑设计研究院, 南京 210096
Author(s):
Zhang Genyu1 Liang Shuting1 Zhu Xiaojun2 Qin Zhishang1
1 School of Civil Engineering, Southeast University, Nanjing 210096, China
2 Architectural Design and Research Institute, Southeast University, Nanjing 210096, China
关键词:
型钢混凝土 抗弯承载力 约束效应
Keywords:
steel-encased concrete bending bearing capacity confinement effect
分类号:
TU398
DOI:
10.3969/j.issn.1001-0505.2009.03.028
摘要:
针对强度叠加法在计算型钢混凝土梁抗弯承载力时过于保守的实际情况,将约束混凝土理论应用于型钢混凝土抗弯承载力的计算中,以考虑型钢及箍筋对混凝土的有效约束作用,并将混凝土划分为约束区与非约束区混凝土.详细介绍了箍筋位置梁横截面约束混凝土面积计算方法,分析了梁中箍筋间距的影响,同时将型钢与箍筋对混凝土的有效约束应力转化为混凝土的约束强度,得到了梁截面中约束区混凝土面积及强度的计算方法.在此基础上,对强度叠加法进行了修正,建立了最大叠加强度的型钢混凝土梁抗弯承载力计算方法.与21个试验值对比分析表明,该计算公式与试验值符合良好.
Abstract:
Aiming at the practical situation of being excessively conservative when calculating the bend bearing capacity of steel-encased concrete beams using the strength superposition method, confined concrete theory is applied in calculating the bend bearing capacity of SRC(steel reinforced concrete members). The efficient confinement effect of steel and stirrups on the concrete is taken into account, and the concrete is divided into two parts, the confinement area and the unconfinement area. The calculating method of confined concrete area of cross section on the place of stirrup is introduced in detail. The influence of stirrups on the area is analyzed, and the effective confinement action of steel and stirrups on the concrete is transformed to the confined strength of concrete, and the computing method of the area and the strength of the confinement concrete on beam cross sections is put forward. Simultaneously, the strength superposition method is revised, and a computational method for calculating the bend bearing capacity of steel-encased concrete beams based on maximum strength superposition is established. A comparison with 21 trial values demonstrates that the calculated values accord well with trial ones.

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备注/Memo

备注/Memo:
作者简介: 张根俞(1983—),男,博士生; 梁书亭(联系人),男,博士,教授,博士生导师,gsdean3@seu.edu.cn.
引文格式: 张根俞,梁书亭,朱筱俊,等.考虑约束效应的型钢混凝土梁抗弯承载力计算分析[J].东南大学学报:自然科学版,2009,39(3):569-573. [doi:10.3969/j.issn.1001-0505.2009.03.028]
更新日期/Last Update: 2009-05-20