Study On Creep Performance Of Cable-membrane Structure

Creep is the most typical and basal distortion fashion of material. Under invariable temperature and outside force, distortion increases gradually with time increase , viz. creep phenomenon. which affects structure use value, so study on creep performance of cable-membrane structure is quite important. Membrane material that used in cable-membrane structure is a sort of high strength,tender fabric composite material, under not high temperature, even under room temperature, it represents obvious viscoelastic creep phenomenon. As a sort of architecture material, people attent its using performance and wear under certain condition, structure endure long loads can occur transition creep phenomenon, lead stress loss that arose membrane occur drape, and that result in the whole structure carrying capacity descend, even reach destroy. Study membrane material creep performance, in order to offer design stress during project design. During design need to join advance mix setting, that can carry strain guide again on flabby membrane after years, that lead membrane material using in cable-membrane structure has important meaning. At present, during cable-membrane structure investigative field, mainly investigate structure form-finding analysis, static analysis and clipping analysis, use different study means and measure, but not come down to creep factor infection, not considering cable-membrane structure creep performance. Consult large numbers of reference data indicate, study on cable-membrane structure creep performance is very few., due to lace reference data, so this paper use for reference other composite material like membrane material creep performance, study cable-membrane structure creep performance. This paper describes creep performance of cable-membrane structure by using Burgers four component model which describes viscoelastic creep, based on the above equations using Fortran language, educes finite element equation that considers creep affect. At the same time, this paper uses Ansys software analyses creep performance of cable-membrane structure, educes perfect creep curve, which provides science foundation of stress-strain analysis for considering creep affect.