An Analytical Research about Parameter Influence on Large-Scale Anchorage Region with Multiple CFRP Cables
- PDF / 2,789,042 Bytes
- 12 Pages / 595 x 786 pts Page_size
- 93 Downloads / 169 Views
pISSN 1226-7988, eISSN 1976-3808 www.springer.com/12205
DOI 10.1007/s12205-020-2346-6
Structural Engineering
An Analytical Research about Parameter Influence on Large-Scale Anchorage Region with Multiple CFRP Cables Bo Feng
a
, Jitao Zhongb, and Hongming Lia
a
College of Civil Engineering and Architecture, Jiangsu University of Science and Technology, Zhenjiang 212003, China Shandong Key Laboratory of Civil Engineering Disaster Prevention and Mitigation, College of Civil Engineering and Architecture, Shandong University of Science and Technology, Qingdao 266590, China b
ARTICLE HISTORY
ABSTRACT
Received 22 December 2019 Accepted 13 September 2020 Published Online 30 November 2020
This study investigates the mechanical properties of carbon fiber reinforced polymer (CFRP) cable at the anchoring region where arrange the adhesive material with different mediums aiming at reducing the high stress concentration. The 3D finite element (FE) model was established based on cable force of 100t and 1000t, and its accuracy was verified by experimental results. The effects of geometrical dimensions and mediums stiffness on anchoring capacity of the cable was studied. The results show that the proposed anchorage gets high anchoring efficiency. The gradient variation of the stiffness of the adhesive material can effectively reduce the stress crest of the cable at the anchorage region. The distributions of the radial and shear stress of the cable at the anchorage region become comparatively flat with the increase in the number of segments. The variation stiffness and length ratio have the main influence on the stress of the cable in three orientations. Friction coefficient and internal taper have the secondary effects on the radial stress and the axial displacement. Anchor length and thickness of adhesive material only affect the radial stress. Anchorage design should primarily focus on the stiffness and length ratio of the adhesive material. The anchoring method proposed in this paper is helpful to anchor multi-tendon cables efficiently, and promote the application of high-capacity FRP cables in large-span spatial structure.
KEYWORDS CFRP cable Anchorage region FE method Mechanical behavior Parameter evaluation
1. Introduction Carbon fiber reinforced polymer (CFRP) cables consist of highstrength fibers and resin, which have excellent anti-fatigue and anti-corrosion characteristics. Thus, it has been widely used in civil engineering to enhance new structures, reinforce and repair existing structures in the past decades (Naderpour et al., 2019). At present, FRP cable are particularly suitable for application in the large-span spatial structures according to its excellent mechanical properties (Liu et al., 2015). Some studies have proposed applying CFRP cables in the super long-span cable-stayed bridges, whose main-spans were beyond two and even ten kilometers (Wang and Wu, 2010; Wang et al., 2013). Due to the anisotropy of the mechanical properties of the fibers that make up the composite materials, using CFRP as a tens
Data Loading...
