Stability Analysis Of Kiewitt Suspendome And Static Tests Researches Of Suspendome

Suspendome is a new kind of hybrid space structural system, which effectivelyimproves the global stiffness and the stability of single-layer dome. It's made up ofsingle-layer dome and tensegrity system. Due to its taking full advantages of twosystems and keeping from their own shortcomings, suspendome can be used in largespan space structure more reasonable and effective in the future. This paper simply introduces present research conditions of suspendome. it alsoposes several usual forms of suspendome system and lays the emphasis on the stableanalysis of Kiewitt suspendome and carries out detailed studies of the structure by theuse of FEM software. Besides these, structural design and the static field testsresearches of the suspendome is included, which is carried out at the honored guestroom of Tianjin museum this spring. Nonlinear stable analysis of Kiewitt suspendome is carried out in this paper.Structural parameters of suspendome, such as prestresses of cables, heights of struts,rise-span ratio, the number of cable rings, which influence the structural stableload-carrying capacity, have been analyzed in this paper by employing acomputational model of the Kiewitt suspendome. The result of the single-layer domewhich is used to compare with the Kiewitt suspendome is also included. The research shows that, these parameters deal differential influence on thestability of the Kiewitt suspendome. The stable load-carrying capacity of the Kiewittsuspendome extends when prestresses of cables goes up, increases remarkably whenheights of struts magnify. Although the stable load-carrying capacity of the Kiewittsuspendome will be higher when rise-span ratio increases, the enhancement of thestructural stable load-carrying capacity is more remarkable under the lower rise-spanratio circumstance. The outside cable rings place more influence on the structuralstable load-carrying capacity. Considering on the model used in this paper, structuralstable load-carrying capacity changes little in the comparison between only outsidecable rings included and all cable rings included. As the prestresses method of cablesused in this paper is different from the method used in document[6], flabby of thecables doesn't occur in this paper during the analysis process. Subsequently, structural design of the suspendome at the honored guest room ofTianjin museum is included. Static field material object tests of the suspendome iscarried out this spring, which makes us understand more clearly about the internalforce of the elements, cables and joints displacements of the suspendome. We alsocompare the field tests data with the theoretical data in order to find agreementbetween the practice and the theory. Due to the limitation of the field tests and theoperational difficulty of the cable prestresses, the first test shows significantdifference between the practice and the theory, but the fundamental agreement hasbeen reached between the practical and the theatrical data. The more effective testmethod is anticipated during the forward research and practice.