Research Of Mechanics Characteristic And Optimized Design Of Cable-Stayed Bridge With CFRP Cables

In recent years, With the development of greater span bridge, the material which used for the cable-stayed bridge also set a higher request. For its good performances, such as light weight, high strength, good corrosion resistance and fatigue resistance, Carbon Fiber Reinforced Polymer (CFRP) has caught the attention and interest of the civil engineering realm. Particularly in the large span cable-stayed bridge, the advantage of CFRP cable is particularly obvious. the application of CFRP cable in the relevant research and examples are few yet. This dissertation focuses on cable-stayed bridges with CFRP cable and does a series of theoretical analysis and experimental studies. The work includes four main parts, such as the mechanics of CFRP tendons, the anchoring system of CFRP tendons, Analysis of the static characteristics of long span cable-stayed bridge with CFRP cable, study on experimental cable-stayed bridge with CFRP cable, optimization analysis on CFRP cable-stayed bridge. The main content of the dissertation is briefly summarized as follows.1. The mechanics of CFRP tendonsBased on extensive research in literature and the short-term mechanics experiment. CFRP tendons main mechanics research performance analysis was made. Compared with the performance of CFRP tendons and steel. Studies the feasibility and the superiority of the CFRP cable to replace the steel materials in the large span bridge.2. Experimental study on anchorage device for CFRP cableMainly includes the anchorage device research and the anchor form determination. Carries on the corresponding experiment in the laboratory to the CFRP anchor, designs a set of complete anchor system of CFRP cable. And through to the bond power and the bond length analysis, proposes the efficiency influence factor of anchor, the best bond length and so on.3. Static parameter analysis of large span CFRP cable-stayed bridge Elaborated the influence of various parameters to the great span cable-stayedbridge especially in large span cable-stayed bridge. And compared the limit span of CFRP cable-stayed bridge and the steel mechanics cable-stayed bridge from the static characteristic angle. Points out the application prospect of CFRP cable in large span cable-stayed bridge.