Abstract: A double strut cable dome structural system was presented to improve the mechanical behaviour of a cable dome. This structure has good stability and is convenient to construct. To investigate its construction method and static performance, a structural model with a 6-m diameter was designed. From the nodal equilibrium equation, the calculation formulas for the prestress distribution with self-weight considered were deduced. Two types of construction methods, namely, assembling at high altitude and integral lifting, were adopted in the shape-forming process of the double strut cable dome, monitoring the internal force of the cable-strut components and the structural deformation. According to loading tests under full-span load and half-span load, the static behaviour of the structure was obtained and compared with the results from finite element analysis. Using the formulas deduced in this paper, the actual initial prestress considering self-weight for a double strut cable dome can be obtained accurately. This structure was suitable for tensioning the outer diagonal cables to apply prestress. Combined with the construction method for integral lifting, the difficulty and workload of the construction process can clearly be reduced, making the structure favourable for engineering application. Under an external load, the internal force of the ridge cables and inner diagonal cables decreases and the internal force of the other components increases. The results of the model tests were in good agreement with those of the finite element analysis.

双撑杆索穹顶施工成形和静力性能试验研究

[1]Ding MM, Luo B, Guo ZX, et al., 2015. Integral tow-lifting construction technology of a tensile beam-cable dome. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 16(12):935-950.

[2]Dong SL, Yuan XF, 2008. Advances in research on cable domes. Journal of Zhejiang University (Engineering Science), 42(1):1-7 (in Chinese).

[3]Fu F, 2005. Structural behavior and design methods of tensegrity domes. Journal of Constructional Steel Research, 61(1):23-35.

[4]Fuller RB, 1975. Synergetics: Explorations in the Geometry of Thinking. Macmillan Publishing Co., New York, USA.

[5]Gao Z, Xue S, He Y, 2015a. Analysis of design and construction integration of rigid bracing dome. Advances in Structural Engineering, 18(11):1947-1958.

[6]Gao Z, Xue S, He Y, et al., 2015b. Construction forming and mechanical properties test of rigid bracing dome. Journal of Building Structures, 36(10):29-36 (in Chinese).

[7]Gasparini DA, Perdikaris PC, Kanj N, 1989. Dynamic and static behavior of cable dome model. Journal of Structural Engineering, 115(2):363-381.

[8]Ge J, Zhang A, Liu X, et al., 2012. Analysis of tension form-finding and whole loading process simulation of cable dome structure. Journal of Building Structures, 33(4):1-11 (in Chinese).

[9]Geiger DH, Stefaniuk A, Chen D, 1986. The design and construction of two cable domes for the Korean Olympics. Proceedings of the IASS Symposium on Shells, Membranes and Space Frames, 2:265-272.

[10]Hanaor A, 1988. Prestressed pin-jointed structures—flexibility analysis and prestress design. Computers & Structures, 28(6):757-769.

[11]Huang CW, Deng Y, Song WM, 1999. Experiment analysis of cable dome structure. Spatial Structure, 3:40-46.

[12]Kan Y, Ye JH, 2008. Form finding and loading experiment of cable domes. Engineering Mechanics, 25(8):205-211 (in Chinese).

[13]Lee K, Han S, Park T, 2012. Stabilization process analysis of cable dome structure. International Journal of Steel Structures, 12(4):495-507.

[14]Levy MP, 1994. The Georgia dome and beyond: achieving lightweight-longspan structures. Spatial, Lattice and Tension Structures: Proceedings of the IASS-ASCE International Symposium 1994; Held in Conjunction with the ASCE Structures Congress XII, p.560-562.

[15]Pellegrino S, 1992. A class of tensegrity domes. International Journal of Space Structures, 7(2):127-142.

[16]Pellegrino S, 1993. Structural computations with the singular value decomposition of the equilibrium matrix. International Journal of Solids and Structures, 30(21):3025-3035.

[17]Quagliaroli M, Malerba PG, Albertin A, et al., 2015. The role of prestress and its optimization in cable domes design. Computers & Structures, 161:17-30.

[18]Taniguchi T, Ishii K, Toda I, et al., 1987. Report on experiments concerning tension dome. Proceedings of International Colloquium on Space Structures for Sports Buildings, 1:550-557.

[19]Terry WR, 1994. Georgia dome cable roof construction techniques. Spatial, Lattice and Tension Structures: Proceedings of the IASS-ASCE International Symposium 1994; Held in Conjunction with the ASCE Structures Congress XII, p.563-572.

[20]Yamaguchi I, Okada K, Kimura M, et al., 1987. A study on the mechanism and structural behaviors of cable dome. Proceedings of International Colloquium on Space Structures for Sports Buildings, p.534-549.

[21]Yuan X, Chen L, Dong S, 2007. Prestress design of cable domes with new forms. International Journal of Solids and Structures, 44(9):2773-2782.

[22]Yuan XF, Dong SL, 2003. Integral feasible prestress state of cable domes. Computers & Structures, 81(21):2111-2119.

[23]Zhang A, Liu X, Li J, et al., 2012. Static experimental study on large-span cable dome structure. Journal of Building Structures, 33(4):54-59 (in Chinese).

[24]Zhang G, Ge J, Wang S, et al., 2012. Design and research on cable dome structural system of the National Fitness Center in Ejin Horo Banner, Inner Mongolia. Journal of Building Structures, 33(4):12-22 (in Chinese).

[25]Zhang LM, Chen WJ, Dong SL, 2007. Initial pre-stress finding procedure and structural performance research for Levy cable dome based on linear adjustment theory. Journal of Zhejiang University-SCIENCE A, 8(9):1366-1372.

[26]Zheng JH, Luo YZ, Dong SL, et al., 2008. Model experimental research on rectangular cable dome. Journal of Building Structures, 29(2):25-31 (in Chinese).

[27]Zhou JY, Chen WJ, Zhao B, et al., 2015. Distributed indeterminacy evaluation of cable-strut structures: formulations and applications. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 16(9):737-748.