# Design and Mechanical Properties of Flat Anchorage Limit Plate
## 1 Introduction  
With the rapid development of national high-speed railways and expressway projects, prestressed structures have been increasingly widely used. Various new high-strength prestressed members have been designed, and various new anchorages are being widely used, among which the most important application is for various new bridges. The new 2000 MPa parallel steel wire stay cable used for the Hutong Yangtze River Bridge was specifically designed with a supporting anchorage in the research and development stage, and the stress and deformation in the anchorage were analyzed using the finite element method, the results of which verified that the strength and stiffness of the anchorage met the requirements [1]. Similarly, in the research and development of a 1960 MPa main cable steel wire and cable strand for the Humen Second Bridge, the corresponding anchorage was specifically designed, the design drawing was created, and finite element analysis was performed for verification [2]. In the construction of the Wuhan Qingshan Yangtze River Bridge, the anchorage with a 1860 MPa stay cable was specifically designed, and 42 CrMo as selected as the anchorage material. The anchorage size was studied and checked using finite element analysis [3]. During the construction of the Third Yangtze River Bridge in Wuhu, a DM upsetting anchorage was used to stretch the steel wire, and a series of measurements were recorded to avoid quality problems such as fractures caused by eccentric stress at the pier head [4]. In the construction of the Wuhe Dinghuai Huaihe River Bridge, rotary cables in the same direction were adopted, a special anchorage system was designed, and specific construction technology was studied [5]. The development of special anchorages is sometimes aimed at specific materials; for example, when FRP composite materials have been used to strengthen prestressed members, many scholars have designed matching anchorages. [PERSON] et al. [6] designed a clip-bonded anchorage with a jack to tension CFRP bars. [PERSON] et al. [7]designed a set of anchorages for tensioning and strengthening CFPR plates and tested the mechanical properties of strengthened beams. [PERSON] et al. [8] designed a new anchorage for bonded prestressed CFRP plates, which were used to strengthen RC beams for a fatigue performance test. [PERSON] et al. [9] adopted a self-developed CFRP plate tensioning anchorage device for an experimental study on the creep performance of strengthened beams on bridges, which could prevent the prestress loss caused by anchorage slip. [PERSON] et al. [10] designed a frictional anchorage system for flat CFRP ribbon strips and developed an anchorage prototype optimizing the geometry for compact spiral distribution to ensure the gripping system's specific traction ratio. A new split wedge anchorage system was proposed for FRP cables by [PERSON] et al. [11], which has a cable capacity of 257 kN. [PERSON] et al. [12] set handmade mat anchorages between concrete and GFRP bars to enhance bonding. [PERSON] et al. [13], [PERSON] et al. [14; 15], [PERSON] et al. [16], and [PERSON] et al. [17] also performed related studies. After the anchorage design is completed, experimental studies of its mechanical properties are usually required. [PERSON] et al. [18] studied the tangential stiffness between different anchorages and backing plates through field tests and theoretical analyses. [PERSON] et al. [19] designed a complete set of anchorage systems, including an anchor backing plate and a clip, to cope with the tension of 2000 MPa prestressed steel strands and performed numerical simulations and static load testing to study the anchorage's performance. In the study of long-span prestressed beamless floor slabs, [PERSON] et al. [20] used clip anchorage to tension prestressed tendons, described the tensioning process and key points, and optimized the design. Many scholars have studied anchorages matched with some special materials.