无黏结预应力混凝土桥墩极限抗弯承载力研究

王会利; 姜荣斌; 秦泗凤

doi:10.16411/j.cnki.issn1006-7736.2013.02.018

大连海事大学学报 >

2013 , Vol. 39 >Issue 2: 133 - 136

DOI: https://doi.org/10.16411/j.cnki.issn1006-7736.2013.02.018

交通运输工程

无黏结预应力混凝土桥墩极限抗弯承载力研究

王会利 ,
姜荣斌 ,
秦泗凤

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1.大连理工大学桥梁工程研究所，辽宁大连116023；2. 同济大学建筑设计研究院有限公司，上海200092；3.大连大学材料破坏力学数值试验研究中心，辽宁大连116022

王会利（1979-），男，博士，副教授，E-mail：whl7997@163.com.

收稿日期: 2012-07-20

网络出版日期: 2023-05-25

基金资助

国家自然科学基金资助项目（51008047;51108052）.

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Research on ultimate moment of unbounded prestressed concrete pier

WANG Hui-li ,
JIANG Rong-bin ,
QIN Si-feng

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1. The Bridge Science Research Institute , Dalian University of Technology, Dalian 116023, China;2. Tongji Architectural Design Co.,Ltd.,Shanghai 200092, China;3. Research Center for Numerical Tests on Material , Dalian University, Dalian 116022, China

Received date: 2012-07-20

Online published: 2023-05-25

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摘要

推导了无黏结预应力混凝土桥墩的抗弯极限承载力的计算公式，分析了极限承载力与预应力钢筋面积、普通钢筋面积和混凝土强度等影响因素的关系.基于塑性铰法，对无黏结预应力混凝土桥墩的抗弯极限承载力进行研究，分析了各因素对抗弯极限承载力的影响.结果表明，增大普通钢筋面积和混凝土强度可以提高抗弯极限承载力；极限弯矩随着预应力钢筋的增多，先增大后减小.因此，对于预应力混凝土桥墩，增大普通钢筋配筋率对提高极限抗弯承载力最有效，但要控制预应力钢筋的数量.

关键词： 无黏结; 预应力混凝土; 桥墩; 极限抗弯承载力

本文引用格式

王会利 , 姜荣斌 , 秦泗凤 . 无黏结预应力混凝土桥墩极限抗弯承载力研究[J]. 大连海事大学学报, 2013 , 39(2) : 133 -136 . DOI: 10.16411/j.cnki.issn1006-7736.2013.02.018

Abstract

The calculation formula for the ultimate flexural capacity of the unbonded prestressed concrete bridge pier is derived, and the relationships between the ultimate bearing capacity and prestressed reinforcement area, the common reinforcement area, the strength of concrete and other influence factors are analyzed. The ultimate flexural capacity of the unbonded prestressed concrete bridge pier is studied based on the plastic-hinge method. Then the influence of different factors on the ultimate flexural capacity is analyzed. Results show that the increase in the area of common reinforcement and the strength of concrete can enhance the ultimate flexural capacity. Moreover, the ultimate bending moment increases first and then decreases with the increasing of the prestressed reinforcement. Thus, the most effective method to increase the ultimate flexural capacity of prestressed concrete bridge pier is to increase regular reinforcement ratio, but to control the number of prestressed reinforcement simultaneously.

Key words： unbounded; prestressed concrete; pier; ultimate flexural capacity

参考文献

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