水利与建筑工程学报
水利與建築工程學報
수리여건축공정학보
TECHNIQUE OF SEEPAGE CONTROL
2014年
2期
31-34
,共4页
群锚%超张拉%控制应力%应力滞后
群錨%超張拉%控製應力%應力滯後
군묘%초장랍%공제응력%응력체후
colony anchor%overload tensioning%control stress%stress lagging
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。
對連續多跨預應力混凝土樑的群錨預應力觔採用單根張拉方式進行應力測試，探討無粘結預應力觔束的張拉工藝，穫得瞭計算預應力損失的有關參數。試驗錶明長無粘結預應力觔束在張拉中存在粘滯現象，得到瞭單根張拉、後張拉預應力觔對已張拉鎖定瞭的預應力觔的應力影響程度和裂縫控製條件等，對預應力混凝土構件的設計和施工有較好的參攷價值。
대련속다과예응력혼응토량적군묘예응력근채용단근장랍방식진행응력측시，탐토무점결예응력근속적장랍공예，획득료계산예응력손실적유관삼수。시험표명장무점결예응력근속재장랍중존재점체현상，득도료단근장랍、후장랍예응력근대이장랍쇄정료적예응력근적응력영향정도화렬봉공제조건등，대예응력혼응토구건적설계화시공유교호적삼고개치。
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 .
