摘要
对体外预应力混凝土箱梁从预应力钢绞线张拉到构件破坏的受力全过程进行试验,重点研究了体外预应力混凝土薄壁箱梁在各级荷载作用下体外预应力筋应力增量的变化规律;在试验结果的分析基础上,确定了混凝土薄壁箱梁在不同受力阶段体外预应力筋应力增量计算方法,全过程分析结果与实测值吻合较好。
The full process of stress conditions from tensioning of the prestressing strands to failure of the element of the externally prestressed concrete box girder was tested. In the test, the regularities of stress increment variation of the external prestressing strands of concrete thin-walled box girder under different load levels are studied in details. Based on the analysis of the test results, the calculation methods for the stress increment of the external prestressing strands of the box girder at different loading stages are developed. The analytical results of the full process of the test agree fairly well with the field measurements.
出处
《桥梁建设》
EI
CSCD
北大核心
2003年第6期8-10,14,共4页
Bridge Construction
基金
国家自然科学基金项目(59808005)
关键词
体外预应力筋
混凝土
薄壁结构
箱形梁
应力增量
externally prestressing tendon
concrete
thin-walled structure
box girder
stress increment
