Papers by Keyword: Supporting Structure

Abstract: The article is devoted to the investigation of the technology of the wood-glued structures manufacture with strengthening the supporting zones by a prepreg on the basis of the fiberglass and the glued oligomer with the addition of the carbon nanotubes (CNTs). The peculiarities of the wooden beams cross-sections have been presented. The main types of fiberglass have been reviewed. The article describes strengthening the supporting zones of wooden and glued-wood beams. The method of nanoparticles application in adhesive compositions to improve their physical mechanical properties has been considered. The technological process of manufacturing the glued-wood structure and its strengthening has been developed.

Abstract: A slender steel arch supporting textile membranes in a complex membrane structure with respect to in-plane and out-of plane stability is investigated. In the last decades the textile membranes are widely used to cover both common and exclusive structures due to progress of new membrane materials with eminent properties. In comparison with use of a traditional roof decking these structures are much more economical and attractive. However, the complex analysis and computational design methods are demanding and still not codified. The real physical model of a membrane structure supported by two inner steel arches and covering a concert stage was constructed and tested in laboratory of CTU in Prague. The membrane used was the Précontraint 702S Ferrari¹ prestressed textile membrane with PVC coating. The arches were hot-formed in a workshop from Grade S355J0 steel. The paper presents experimental results for: i) isolated inner arch, ii) complex structure of the membrane with supporting arches, both under symmetrical and asymmetrical loading. Furthermore the numerical nonlinear FEM model created in SOFiSTiK software package and its validation for the above structural configurations and loading is presented. Subsequent parametrical studies cover various levels of the membrane prestressing to show its significance for nonlinear behaviour and stability of the inner arch. Finally some recommendations concerning numerical modelling are presented.

Abstract: Inner climbing tower crane supporting system itself is statically indeterminate structure. This paper would use the force method of structural mechanics to solve this kind of statically indeterminate problem. Through the MATLAB software, it can get the horizontal counterforce of the inner climbing tower crane supporting system diagram which about the cross sectional area of strut and moment of inertia of beam.

Abstract: Supporting system of external suspension tower crane is the key factor which impairs the safety of the tower cranes. In this article, the problem is studied about the influence of different supporting point stiffness on the force of the tower crane external suspension. Based on the structural mechanics theory, the displacement of the lower statically indeterminate beam and the horizontal displacement of the upper statically indeterminate truss are solved firstly, then the stiffness of the supporting point on the lower beam and the entirety stiffness of the upper horizontal combination struts can be obtained. We can get the optimal supporting structure by drawing the relationship of stiffness1-stiffness2-force which is of significant to the external suspension’s design and installation in Matlab software.

Abstract: This paper analyzes an engineering in an area of China which was processed by vacuum preloading technology in the silt soft soil. This engineering was used rigid supporting structure technology of piles in row and bolts for large area of deep foundation pit supporting. It compared the realistic measure soil pressure and theoretical concluded soil pressure, and got the soil pressure distribution mode which is suitable for silt soft soil processed in this way. The conclusion can provide a reference for similar supporting structure system to calculate earth pressure.

Abstract: The supporting structure in foundation pit is very important in civil engineering and is used to support the whole foundation pit. Its diaplacement is directly related to the safety of buildings. White light digital image analysis in frequency domain has the advantages of whole-field, non-contact measurement and the simple measuring system and can obtain displacements by frequency domination correlation arithmetic. In this paper, the method was introduced to measure the displacements of supporting structure. The experimental results show the usability of the method for supporting structure in foundation pit.

Abstract: This paper introduces the design selection and implementation program of the supporting structure of no-load side-direction excavated CFG composite foundation, in the case of the foundation pit excavation of stage bin of the Jinan Cultural Arts Center Grand Theater. The monitoring data shows that the lateral reinforcement effect of no-load CFG composite foundation can not be discounted. Based on composite foundation and rock mechanics, consider the no-load CFG composite foundation as the composite soil, build its mechanics index system and calculation method. Calculating and analyzing of the supporting structure that placing a row of anchor cable in cantilever double-row pile and double-row pile by means of applying composite soil parameters and using the pit design software and numerical simulation, and comparing the result with actual monitoring data. Therefore, we can further prove that lateral reinforcement effect on soils by considering CFG composite foundation.

Abstract: Qualisys is a camera system designed initially for 3D record of body motion that is firmly marked with special points called markers. Qualisys uses infrared range of frequencies and the main advantage of the system is the fact that it records coordinates of markers and therefore the need of complicated and often not accurate image analysis is not necessary. The system was used for measuring of properties and strength of partial supporting structure of refrigerating racks and for testing of completed prototypes. Strength and deformation resistance that were specified by maximal force of safe structural changes was determined during the testing. The loading capacity of prototypes was tested using by the producer described and standardized procedure. Monitoring of deformation propagation in different components and also the completed rack was performed using the Qualisys system which allows continuous measuring over a period of loading and unloading. The results of tests enabled to verify analytically or FEM gained preliminary results of calculations easily and promptly. This work should contribute to discover utilization of alternative measuring technologies that are common in many other branches. The application of these systems may influence significantly technical complexity of some solved issues.

Abstract: Taking a deep foundation pit engineering in Taiyuan as research background, this paper used two different supporting structure of foundation pit to make numerical simulation analysis by using Li zheng software. The engineering material had high cost performance. In addition, the paper studied the displacement, bending moment, shear force with the change of the excavation depth, and it came to the conclusion that some outcome can be used for reference in the practical engineering.

Abstract: This paper summarizes the structure forms and characteristics of the aqueduct's supporting structure. The main method of plastic limit analysis and theory of the aqueduct's supporting structure were introduced, and the existing problems of the present research were analyzed in the paper, and thereby the research trends of the ultimate bearing capacity of the aqueduct's supporting structure in near future was proposed.