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Determination method of support joint allowable error of cable-rod tensile structure

A tension structure and determination method technology, applied in the direction of building structure, construction, instruments, etc., can solve the problems of rare error sensitivity analysis, allowable error of support nodes and construction control accuracy requirements have not yet been developed, and achieve the allowable error Accurate, sure and accurate effect

Active Publication Date: 2018-01-09
WENZHOU UNIVERSITY
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Problems solved by technology

[0005] To sum up, it can be seen that the sensitivity analysis of the support node error of the cable-strut tension structure is rare at present, and the allowable error of the support node and the construction control accuracy requirements have not yet been developed.

Method used

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  • Determination method of support joint allowable error of cable-rod tensile structure
  • Determination method of support joint allowable error of cable-rod tensile structure
  • Determination method of support joint allowable error of cable-rod tensile structure

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Embodiment Construction

[0027] According to the reliability theory, after the construction of the structure is tensioned, it must meet the limit state of bearing capacity and the limit state of normal service under the action of load. Among them, the reliability under the limit state of normal use can be based on the "Unified Standard for Reliability Design of Building Structures", and the reliability index β of 0-1.5 can be selected according to the degree of deformation reversibility. In view of the obvious geometric nonlinearity and non-conservative nature of the cable-strut tension structure, it is recommended to choose a large value for its reliable index β under the limit state of normal service. At the same time, according to the "Technical Regulations for Prestressed Steel Structures", the deviation of the internal force of the load-bearing cables should be controlled within ±10% after the construction of the flexible cable rod pretensioned structure is completed.

[0028] see figure 1 , is ...

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Abstract

The invention relates to a determination method of a support joint allowable error of a cable-rod tensile structure. Firstly a support joint error model of the cable-rod tensile structure following definite distribution in radial, circular and vertical directions is constructed based on the stochastic theory; error sensitivity of the structure for positional deviations in the radial, circular andvertical directions of the support joint is reviewed by use of a Probabilistic Design System (PDS) module in the ANSYS software and the Latin Hypercube Sampling (LHS); on the basis, the concept of searching error allowable value and the specific search method are further put forward under the conditions that the reliability index is not less than 1.5 and the cable-rod internal force deviation is not more than 10% in the serviceability limited state and the serviceability limited state is satisfied in accordance with Unified Standard for Reliability Design of Building Structures and Technical Specification for Prestressed Steel Structures. The method is of strong theoretical foundation, capable of accurately determining the support joint allowable error of the cable-rod tensile structure and generally applicable to the support joint error calculation field of the cable-rod tensile structure.

Description

technical field [0001] The invention relates to the technical field of allowable error calculation of support nodes, in particular to a method for determining the allowable error of support nodes of a cable-strut tension structure. Background technique [0002] Reasonable design and precise distribution of pretension are the key factors to realize the superior bearing performance of pretension structures. However, due to the complexity of the actual pretension structure construction site, there are multiple construction stages, and various errors in each stage and link lead to the final shape of the structure. There is a certain deviation from the design state (including pretension deviation and shape deviation), which sensitively affects the working performance and bearing capacity of the structure. Therefore, it is of great significance to carry out the analysis and evaluation of construction errors oriented to actual projects, and further control the allowable range of va...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50E04B1/19
Inventor 陈联盟胡栋高伟冯
Owner WENZHOU UNIVERSITY
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