Study On Mechanical Performance Of Suspended Cable-Arch Structures And The Applications

Suspended cable-arch structure consists of cable-arch structure and suspended structure, this structure system use by synthesis the performance and economy index of different structures, so it is not only satisfied the esthetics request but also reasonably span larger span .This article will build a mode for a practical project in order to analysis the influence of prestressing cable and suspended cable to suspended cable-arch structure and the cooperation of them. The result of analysis will give theory gist for this structure's design.Firstly, the development and study status quo of suspended structures ,cable-arch structures and suspended cable-arch structures are retrospected ,then a 3D finite-element mode is built according as a practical project. Besides, mechanic performances of suspended roof, cable-arch roof and arch roof are simulated through the function of alive and death element of Ansys in order to compare with suspended cable-arch structure. Static loading is one of the most important and common loading that structure must support, so the article will do some work as follows about static performance of the structure: compared the buckling bearing capability, postbuckling behavior, distribution of inner force and stress of key element of different structure in order to get the influence of suspended cable and prestressing cable to structure. Of course include their cooperation. For the sake of avoiding the damage of structure under the dynamical loading such as earthquake and wind, so the article also does some study about dynamical performance of the structure as follows: compared vibration character including frequency and mode, so as to get the influence of suspended cable and prestressing cable to the structure; compared the response of different structure under earthquake for getting the effect of suspended cable and prestressing cable to the structure's response of dynamical loading. The method of time history analysis is adopted when analysis the performance of the structure's seismic resistance. The earthquake waves which are input include two practical earthquake waves which has been equivalent treated and the one which is simulated by numerical method. Simulated earthquake wave that fit standard response spectrum is produced on the ground of Trigonometric series method by matlab process compiled by myself.Because the structure scheme of HSS-Hybrid Space Structures which are affected by cable is most important for structure's last form finding and safe service, so this article studies the structure process of suspended cable-arch roof. Of course, the studies of the influence to the structure's last form fitting and mechanic status are the chief aim, because different strain sequence of suspended cable has different effect to to the structure's last form fitting and mechanic preformace. Besides, suspended cable is one of the most important supporting components and long exposed in atmosphere, so antisepsis of suspended cable is studied last in this article.