| The whole building relocation, which, as one type of newly-emerging technology, is characteristic of low construction cost, short project time, little affection on people's life and work, and reducing environmental pollution caused by construction trash as well, has been more and more widely applied in the process of the reconstruction of modernized urban cities.This article takes as the research background the key scientific research project "Large-scale Building Lifting, Translation Engineering Equipment and Analytic Software Development" promoted by Tianjin Municipal science committee. Through an analytic research of the status quo of building relocation home and abroad, this article aims at the selection of the maximum security and different steps at lifting point in building relocation and developing the CAD system for an intellectualized selection for this prupose. And an analytic method of the structure of relocated building based on non-probability set finite element is proposed.This article takes AutoCAD VBA as the development platform of the CAD system for building relocation. The strategies and the methods are found to establish the User Coordinate System (UCS)in the three-dimensional space, and the definition function for establishing UCS is developed. the method supported by the AutoCAD system is encapsulated. The First function of two-dimensional and three-dimensional base map Yuan in UCS is drawn so that the modeling problem in three-dimensional space can be best solved. Founded the really colored packing function, can in the random plane carry on the design hatch in the three-dimensional space.In addition, problems involving structure distortion andn translation track subsidence in building relocation are analyzed. An analytic method and computation model are given to tackle shell structure distortion and elastic foundation beam subsidence. A technical plan stress field cloud chart method based on AutoCAD VBA is proposed. Making use of AutoCAD, the strain field and structure distortion are simulated and the feasibility of this CAD system is verified. |
