高温下CFRP筋横向压缩性能试验研究OA

To improve the high temperature resistance of joints in cable roof structures made of carbon fiber re-inforced polymer(CFRP),the CFRP tendon wedge-type anchorage system was studied.Firstly,the glass transition temperature test of CFRP tendons was carried out to obtain the starting and ending temperatures of the glass transi-tion of CFRP tendons(126℃,192℃).Based on this,the target test temperature for the transverse compressive mechanical test at elevated temperature was further worked out.Then,the same two aluminum plates with semicircu-lar grooving were made of A6061-T6 aluminum alloy to simulate the wedge in the anchoring system.By conducting experiments,the transverse compressive mechanical properties and deformation characteristics of CFRP tendons with the influence of aluminum plate are obtained under high temperature.The results can provide data support for the construction of the constitutive model of CFRP tendons under high temperature.By establishing the finite element model corresponding to the test,the average error between the calculated strain value and the strain value obtained by the test is less than 5％,the validity of thermal and mechanical parameters in the finite element model is demon-strated,and the anchorage system model can be further constructed for high-temperature analysis.