Abstract: At present, internal and external chimneys are mostly used for independent analysis in chimney design. In order to explore the design safety of different sections of suspended inner chimneys under the type of rod system unit and plate system unit respectively, and the differences between separate analysis and collaborative analysis, the finite element software analysis was used. It is found that under the combination of long-term and short-term loads, the GRP inner tube meets the bearing capacity requirements under the condition of meeting the minimum structural layer thickness, and the longitudinal stress of the plate and shell element is 4%~8% higher than that of the bar element. There is no significant difference in the maximum stress value of the FRP tube under 8 local wind loads in the plate and shell element model, which can be ignored. The maximum bending moment of chimney reinforced concrete external cylinder is 2%~8% different from that of the combined model.

Key words: FRP inner cylinder, collaborative analysis, segmented suspension, finite element, thermal power plant