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Study on the Stability Behavior of Cable-arch Structures

Author: HuShuHui
Tutor: GuoYanLin
School: Tsinghua University
Course: Civil Engineering
Keywords: Cable - Arch Structure Span ratio Stability Ultimate bearing capacity Parametric analysis
CLC: TU399
Type: Master's thesis
Year: 2005
Downloads: 230
Quote: 7
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Abstract


Arch structure has many superior features sleek, stiffness and economic benefits are widely used in the field of bridge engineering and structural engineering. However, the arch structure inadequacies, its outer loads easy to instability. In order to improve the stability of the arch structure, the engineering sector in recent years, a cable and arch combination of the new structure - Cable - Arch hybrid structure. In cable - arch structure, due to the presence of cable can effectively control the deformation of the arch, the stiffness and ultimate bearing capacity of the structure can be greatly improved. Depending on the cable arrangement of cable - a variety of the shape of the arch structure. Selected two different Bousso form cable - arch structure. Among them, the cable - cable arch structure I is distributed in accordance with the two-hinged circular arch in the full cross-uniformly distributed loads moment Rab set, cable - arch structure II is in accordance with the three-hinged arch in half cross-uniformly distributed load under the action of the moment distribution to Bousso. Cable - Arch Structure I. This article first analyzes the moment the distribution of two hinged circular arch in the full cross-uniformly distributed loads, which determine the arrangement of Cable - Arch Structure I in cable; then cable - arch structure Ⅰ in the whole cross-uniformly distributed load and half cross-uniformly distributed load of elastic and inelastic stability were studied and compared with the mechanical properties of the pure ARCH; addition, this article analyzes the pull the parameters of the cable cross-section, strut length, pretensioned cable - arch structure I elastic and inelastic stability in order to reveal the cable - arch structure I force characteristics and failure mechanism; Finally, the cable - arch structure Ⅰ in the whole cross-uniformly distributed load under the effect of initial imperfection sensitivity analysis. Before cable - arch structure II study, we first studied the static properties of the pure three-hinged arch. By changing the position of the three-hinged arch span ratio and arch hinge three-hinged arch under different load case elastic and inelastic stability; addition, analysis of the deformation of the three-hinged arch in the arch hinge in different locations and Moment distribution, cable - arch structure II study of the mechanical properties of the basis for guiding. Cable - Arch Structure II, this article mainly by varying the span ratio and arch hinge position to study the elastic and inelastic stability under the full cross-uniformly distributed load and semi-cross-uniform loads, reached a different span ratio Optimal arch hinge position. In this paper, numerical simulation of the two cable - arch structure in the elastic and inelastic stability of different load more comprehensive and in-depth study of the structure parameters for structural stability. The results of research projects such structural design has a certain reference value.

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