Study On Static And Aseismic Behaviors Of Cable-Held Structure

The Cable-Held Structure (CHS) is a new kind of structure and can be applied in long-span buildings and bridges. The shape is similar to the Cable-Stayed Structure (CSS), but its mechanical characteristics are quite different. Because of using continuous cables in CHS, the efficiency of cables is improved a lot and the height of towers decreases greatly. This kind of structure can save a lot of materials. Meanwhile, its span can be greater than that of cable-stayed structure and it is easier to be constructed.Firstly, the structural performance and mechanical behavior are studied. A continuous sliding cable theory and the analysis theory to find the initial forms, which are suitable for the nonlinear study of CHS, are presented. Based on the above theories and considering geometric nonlinearity, finite element analysis models are created to study the single cable held structures and multi-cables held structures.Secondly, through data simulation, the mechanical behavior of single cable held structures is studied under full span loads and half span loads and compared with that of cable-stayed structures. Meanwhile, detailed study are carried out to investigate the influence of load distribution, height to span ratio, side span ratio, end span ratio and cable section on the mechanical behavior of CHS. An optimized range of the above parameters are obtained through study and comparison. Thirdly, the mechanical behavior of multi-cables held structures are studied both under full span loads and half span loads.Finally, the seismic behavior of CHS is studied under both periodical loads and earthquakes with the time history analysis method, and also compared with that of CSS. The results show that the seismic performance of CHS is much better than that of CSS.