CAJ | 학술논문

低回缩预应力钢绞线体系是一种新型预应力体系.为了研究新型二次张拉低回缩预应力锚具的锚下构造,设计了采用二次张拉单孔预应力钢绞线锚具的预应力矩形梁试验,将理论计算结果分别与传统夹片式锚具锚下应力场、新型二次张拉低回缩预应力锚具锚下应力场进行对比,发现在张拉过程中三者锚下应力场的变化规律一致.当采用相同型号的锚下垫板时,各截面应力峰值相差很小,且均未超过试验混凝土的强度.因此,二次张拉单孔预应力钢绞线锚具锚下构造可与传统夹片式锚具完全相同.
저회축예응력강교선체계시일충신형예응력체계.위료연구신형이차장랍저회축예응력묘구적묘하구조,설계료채용이차장랍단공예응력강교선묘구적예응력구형량시험,장이론계산결과분별여전통협편식묘구묘하응력장、신형이차장랍저회축예응력묘구묘하응력장진행대비,발현재장랍과정중삼자묘하응력장적변화규률일치.당채용상동형호적묘하점판시,각절면응력봉치상차흔소,차균미초과시험혼응토적강도.인차,이차장랍단공예응력강교선묘구묘하구조가여전통협편식묘구완전상동.
Low retracting pre-stressing anchorage system (LRPAS) is a new type of post-tensioned prestressing system. An experimental study was carried out to investigate the structural behavior under the new LRPAS. A scaled test specimen using low retracting pre-stress stranded single anchorage was constructed and tested. Based on the strain measurements, the stress field under the traditional anchorage and the new LRPAS were obtained, and the test results were consistent with the theoretical calculation ones. When the same type of steel plate under the anchorage was used, the maximum stress of the cross-section was similar, and did not exceed the strength of concrete. Therefore, compared with the traditional anchorage, the low retracting pre-stress stranded single anchorage has the same construction under the anchor.