A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Prestressed steel strand anchorage device
The invention belongs to the technical field of prestressed anchorage devices, and particularly relates to a prestressed steel strand anchorage device and an anchoring method of prestressed steel strands. Two complementary anchorage devices are used, and an elastic-plastic supporting column (concrete column) is arranged between the first anchorage device and the second anchorage device for butt joint. In the early tensioning stage of the steel strand, the concrete column is in a pressure transmission mode between the first anchorage device and the second anchorage device, and when 85%-90% of the predicted tensioning strength of the prestressed steel strand is reached, the concrete column is gradually damaged, so that the tensioning force of the steel strand is gradually and gently converted into the pressure of the circular truncated cone structure of the second anchorage device on the first anchorage device; the clamp generates axial restraining acting force on the prestressed steel strand, and the thought that the prestressed steel strand is fixed through a traditional anchorage device is changed. Friction force between the steel strand and an anchorage device in the tensioning process is greatly reduced, the retraction problem of the prestressed steel strand is effectively solved, and the stability of a prestressed structure is improved.
本发明属于预应力锚具技术领域，具体涉及一种预应力钢绞线锚具以及一种预应力钢绞线的锚束方法。本发明通过使用两个互补锚具，第一锚具和第二锚具之间设置有弹塑性支撑柱(混凝土柱)来对接。在钢绞线张拉前期，混凝土柱为第一锚具和第二锚具之间压力的传递方式，达到预应力钢绞线预计张拉强度的85％‑90％时，混凝土柱逐渐破坏，使得钢绞线张拉力逐渐平缓地转变为第二锚具的圆台结构对第一锚具的压力，使夹具产生对预应力钢绞线的轴向约束作用力，改变了传统锚具固定预应力钢绞线的思路。本发明极大地减少了钢绞线在张拉过程中与锚具之间的摩擦力，有效解决了预应力钢绞线的回缩问题，并增加了预应力结构的稳定性。
Prestressed steel strand anchorage device
The invention belongs to the technical field of prestressed anchorage devices, and particularly relates to a prestressed steel strand anchorage device and an anchoring method of prestressed steel strands. Two complementary anchorage devices are used, and an elastic-plastic supporting column (concrete column) is arranged between the first anchorage device and the second anchorage device for butt joint. In the early tensioning stage of the steel strand, the concrete column is in a pressure transmission mode between the first anchorage device and the second anchorage device, and when 85%-90% of the predicted tensioning strength of the prestressed steel strand is reached, the concrete column is gradually damaged, so that the tensioning force of the steel strand is gradually and gently converted into the pressure of the circular truncated cone structure of the second anchorage device on the first anchorage device; the clamp generates axial restraining acting force on the prestressed steel strand, and the thought that the prestressed steel strand is fixed through a traditional anchorage device is changed. Friction force between the steel strand and an anchorage device in the tensioning process is greatly reduced, the retraction problem of the prestressed steel strand is effectively solved, and the stability of a prestressed structure is improved.
本发明属于预应力锚具技术领域，具体涉及一种预应力钢绞线锚具以及一种预应力钢绞线的锚束方法。本发明通过使用两个互补锚具，第一锚具和第二锚具之间设置有弹塑性支撑柱(混凝土柱)来对接。在钢绞线张拉前期，混凝土柱为第一锚具和第二锚具之间压力的传递方式，达到预应力钢绞线预计张拉强度的85％‑90％时，混凝土柱逐渐破坏，使得钢绞线张拉力逐渐平缓地转变为第二锚具的圆台结构对第一锚具的压力，使夹具产生对预应力钢绞线的轴向约束作用力，改变了传统锚具固定预应力钢绞线的思路。本发明极大地减少了钢绞线在张拉过程中与锚具之间的摩擦力，有效解决了预应力钢绞线的回缩问题，并增加了预应力结构的稳定性。
Prestressed steel strand anchorage device
一种预应力钢绞线锚具
LIU PING'AN (author) / DUO ZENGSEN (author) / YU XIAOFEI (author) / WANG TIEHU (author) / CHEN YOULIN (author) / CHEN QIANG (author) / SUN ZHOUHUI (author)
2024-10-29
Patent
Electronic Resource
Chinese
| European Patent Office | 2023
Anchorage device reinforcing device for fixed end of prestressed steel strand
| European Patent Office | 2023
Reinforcing device for anchorage device at fixed end of prestressed steel strand
| European Patent Office | 2020
Suspension bridge prestressed steel strand rock hole anchorage and construction method
| European Patent Office | 2023