The Effect Of Temperature Difference, Support Deviation And Support Stiffness On The Inverted Catenary Single-layer Cylindrical Reticulated Shell

With the development of economy and the advance in technology and culture,people put forward higher requirements for the span, the space and the bay of spatialstructures. The cylindrical reticulated shell is a kind of that building being usedwidely. This thesis is mainly focus on static and stability performance of such i n-verted catenary single-layer cylindrical reticulated shell under the above three cond i-tions by ANSYS finite element software.The mechanical performance of the inverted catenary single-layer cylindrical re-ticulated shells is relatively different with the conventional single-layer cylindricalreticulated shells. Firstly, under the different negative temperature differences, theaxial internal forces were compared by three direction members, including archmembers, radial members and diagonal members. Through the parameters analysis,including raise-span ratio and length-span ratio, the displacement of nodes were stu-died. We can see that the lager the negative temperature difference is, the larger thedisplacement is. Then, the law of nonlinear static instability with the variation ofraise-span ratio is investigated, where the initial imperfect is took into considerationat the same time.Secondly, the effect of support displacement and support stiffness on the invertedcatenary single-layer cylindrical reticulated shells was surveyed, because the supportdisplacement will be caused in different direction by construction error or long-termloads and the static and stability properties will be changed greatly. By setting thesupport deviation in x, y and z direction respectively, the sensitivity of mechanicalproperties of this latticed shell to support displacement is concluded.Finally, the support stiffness also can have influence on the mechanical prope r-ties of the reticulated shells. Under this circumstance, the static performance and ul-timate capacity were researched in the case of elastic support in horizontal directionand three-dimension elastic supports separately. Simultaneously, the negative tem-perature differences were applied in case two.The research in this thesis can provide theoretical basis and reference for thepractical engineering application of such structure.