The Optiminization Research Of Construction Process Of Truss String Structure

As people pursuit of material and spiritual culture and improve the accelerating of urbanization, many long-span space structure, make rapid urban appearance grew. The development of large spatial reticulated structures is to satisfy people's livelihood, production demand and proposes and developed. In today's modern city construction in the 70s, ever built, stadiums, cinemas, hall because of its exhibition hall and other reasons such as the insufficient space already cannot satisfy the modern people production, life need, request broader space to serving people. While many development speed of the corresponding to build some large space structure building as reveal oneself the landmark building of city strength. In large-span structures with lightsome beautiful buildings in the form of a long-span prestress chord-tension truss structure is people favour. This structure modelling is concise, fluent, generous, show the modern building modern breath. Big span chord-tension truss structure is lower chord add in ordinary truss structure, and below the poles struts in cable and prestress with prestressed formed the chord-tension truss structure. Chord-tension truss structure in construction field application, it use process endurance and dynamic studies have also made certain progress. Yet for big span chord-tension truss structure, prestressed applied in terms that its due to its complexity of the construction process the most unfavorable stress tend to appear in the construction process and not use process. So it is necessary to research the construction process with what tension scheme, can make the truss rods, and the internal force minimum deformation is relatively minor. Due to the influence chord-tension truss construction drawing process by many factors, this topic will affect the process of drawing tension classification and main factors analysis of tension, it is concluded that sequence of large span chord-tension truss structure construction drawing process and tension sequence and tension grading rules, construction of similar projects that subsequent provide the corresponding technical experience.This paper first introduces chord-tension truss structure development application. From chord-tension truss structure of the domestic and overseas engineering proposal to domestic and foreign relevant research progress and its application. Secondly introduces geometry nonlinear finite element theory and chord-tension truss structure simulation analysis method. Then introduces the paper quotes the physical model test building in Yellow River Estuary construction and monitoring. Finally, this paper ANSYS11.0 finite element program of large span chord-tension truss structure construction drawing process simulation. The Yellow River estuary with practical physical model test hall of sea B hall construction process simulation analysis and comparison with actual monitoring data, the results showed that the monitoring data results and simulation analysis results are verified the general program on the analysis in the process of tension is correct. This paper puts forward several different drawing scheme, a finite element simulation respectively, research chord-tension truss structure in different drawing plan in the change rule of the internal force and deformation, through the contrast and analysis, the paper long-span chord-tension truss structure drawing process optimization tension scheme.