摘要
对连续多跨预应力混凝土梁的群锚预应力筋采用单根张拉方式进行应力测试,探讨无粘结预应力筋束的张拉工艺,获得了计算预应力损失的有关参数。试验表明长无粘结预应力筋束在张拉中存在粘滞现象,得到了单根张拉、后张拉预应力筋对已张拉锁定了的预应力筋的应力影响程度和裂缝控制条件等,对预应力混凝土构件的设计和施工有较好的参考价值。
The test has been done to find a new way to prestress the single reinforcing steel bar for consecutive concrete beam ,the prestressing technics is discussed ,and the concerned parameters for counting the prestressing loss are ac -quired .The test shows that there exists the sticky phenomena in long non-bond prestressed reinforcing steel tendon ,and the influence degree of the stress and the control conditions of the crevasses etc .for locked prestressed reinforcing steel bar when prestressing it singly and later are obtained from the test ,which could offer the preferable references to the de-sign and construction of prestressed concrete structures .
出处
《水利与建筑工程学报》
2014年第2期31-34,共4页
Journal of Water Resources and Architectural Engineering
基金
辽宁省自然科学基金计划项目(200920)
关键词
群锚
超张拉
控制应力
应力滞后
colony anchor
overload tensioning
control stress
stress lagging
