Concepts,forms and basic analysis of FRP woven web structure

This paper presents an FRP(fiber reinforced polymer) woven web structure for large-span roof system composed of light-weight,high-strength and anticorrosion FRP strips.FRP strips are crossed and woven to form a flexible FRP web plane,the outer edge of which is fastened and anchored on a ring beam.And the suspended special mass or stressed tendons are applied to the inner web to achieve the tension of the web.The whole web serving as the structure of large-span roof is stressed to have the sufficient stiffness and capacity.An FRP woven web structure is composed of woven web,ring beam for anchoring and equipment for out-of-plane tensioning.It is constructed by the five steps: construting ring beam,weaving FRP web,anchoring after pre-tension,stressing web,and fixing.The loading condition can be categorized into three major stress stages,the initial prestressed state,the out-of-plane tensioned state and the service loading state.The geometry configuration of woven webs is mathematically described in the coordinate matrices.Various planar woven patterns and structural forms are presented.A simplified model of FRP woven web structure is analyzed,and an example of a simple structure is designed with finite element software,validating the feasibility of the FRP woven web structure.