- 摘 要
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(1 重庆大学土木工程学院,重庆 400045;2 机械工业第三设计研究院,重庆 400039;3 重庆第七建筑工程责任有限公司,重庆 400020)
[摘要]以混凝土结构的时变特性为基础,制定施工期预应力混凝土梁的实测方案和内容,通过原位实测,选择施工期预应力混凝土梁的实测工况,根据实测数据,分析预应力梁在施工期各工况的受力重分布规律。通过分析,指出了施工工序对施工期预应力混凝土结构受力性能的影响规律,实测数据证明了预应力筋张拉对施工期结构受力性能重调整的影响程度在10%~25%之间。该实测试验及相应结论为施工期预应力混凝土结构性能的受力分析和安全控制提供了实测依据。
[关键词]时变体系;预应力混凝土;施工期;实测;受力性能
中图分类号:TU378.2文献标识码:A文章编号:1002-848X(2011)03-0059-05
Measurements onsite of characteristics of prestressed concrete beams during construction
Wang Bocheng1, Yang Xiuli2, Hua Jianmin1, Zhu Shuneng3
(1 College of Civil Engineering, Chongqing University, Chongqing 400045, China; 2 Third Design and Research Institute,
MI. China, Chongqing 400039, China; 3 Chongqing 7th Construction Co., Ltd.,Chongqing 400020, China)
Abstract:Based on the time varying characteristics of reinforced concrete structure, the scheme and the content of on-site measurement to the prestressed concrete beams were executed. According to the on-site measurement, the measuring condition of the prestressed beams during construction was selected, and the re-distribution of internal forces during construction was analyzed. The regularity between the work condition and the structure during construction is pointed out. The ratio of the internal-force re-adjusted is proved to 10% to 25%. The above contents can be reference for analyzing the characteristics of the concrete structure and ensuring the safety during construction.
Keywords:time varying systems; prestressed concrete; during construction; on-site measurements; force characteristic
*混凝土结构施工过程受荷及安全控制基金项目资助(中建总公司CSCEC-Z-05)。
作者简介:王伯成,博士研究生,一级注册结构工程师,Email:wangbocheng629@163.com。
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