[1]刘钊,贺志启,王景全.基于能量法的体外预应力梁力筋应力增量研究[J].东南大学学报(自然科学版),2008,38(1):136-140.[doi:10.3969/j.issn.1001-0505.2008.01.026]
 Liu Zhao,He Zhiqi,Wang Jingquan.Stress increment study of external tendons based on energy method[J].Journal of Southeast University (Natural Science Edition),2008,38(1):136-140.[doi:10.3969/j.issn.1001-0505.2008.01.026]
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基于能量法的体外预应力梁力筋应力增量研究()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
38
期数:
2008年第1期
页码:
136-140
栏目:
交通运输工程
出版日期:
2008-01-20

文章信息/Info

Title:
Stress increment study of external tendons based on energy method
作者:
刘钊 贺志启 王景全
东南大学混凝土及预应力混凝土结构教育部重点实验室, 南京 210096
Author(s):
Liu Zhao He Zhiqi Wang Jingquan
Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education,Southeast University, Nanjing 210096, China
关键词:
预应力梁桥 体外预应力 应力增量 能量法 正常使用状态
Keywords:
prestressed concrete bridges external prestressing stress increment energy method service limit states
分类号:
U378.1
DOI:
10.3969/j.issn.1001-0505.2008.01.026
摘要:
以体外预应力简支梁为研究对象,针对结构的正常使用阶段,利用能量法推导了典型布筋形式与荷载形式下体外预应筋应力增量的解析计算公式,公式的物理意义明确,包含梁的几何尺寸、截面刚度、预应力筋位置、外荷载大小及位置等必要的参数.在此基础上,通过对解析式的合理简化,给出了实用简化计算公式,并对影响应力增量的外荷载大小和力筋偏心距等关键因素进行了参数分析.此外,还应用能量法推导了体外预应力连续梁的力筋应力增量公式.最后,通过与已有试验结果的对比,验证了本文所推导的解析公式和简化公式的适用性.
Abstract:
Using the principle of energy conservation, analytical formulae for calculating the stress increment of external tendons of externally prestressed beams are derived under service limit states, which are applicable to both simply supported and continuous beams and suitable to two typical load cases. The formulae have clear physical significance, which include some influential factors, such as beam geometry, material properties, tendons profile and load cases. Simplified formulae are also deduced by reasonable simplification to the above analytical ones. Furthermore, parametric studies are carried out based on the simplified formulae. In the end, the accuracy of the proposed formulae is justified by comparing the analytical solutions with some experimental results reported in the technical literature.

参考文献/References:

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[5] 杜进生,刘西拉.基于结构变形的无粘结预应力筋应力变化研究[J].土木工程学报,2003,36(8):12-19.
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[7] 娄廷会,易建国.活载作用下简支梁体外预应力内力增量的简化计算[J].上海公路,1999(S1):163-166.
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备注/Memo

备注/Memo:
作者简介: 刘钊(1964—),男,博士,教授,mr.liuzhao@seu.edu.cn.
基金项目: 江苏省交通科学研究计划资助项目(06Y41).
引文格式: 刘钊,贺志启,王景全.基于能量法的体外预应力梁力筋应力增量研究[J].东南大学学报:自然科学版,2008,38(1):136-140.
更新日期/Last Update: 2008-01-20