Research On Simulation Analysis Of Intergral Lifting Construction For The Src Structures

The application of the steel reinforced concrete structure in the large space structure is becoming more and more widely with its good mechanical properties, superior economic performance and outstanding comprehensive benefits. Steel reinforced concrete structure belongs to the composite structure, composed of section steel, steel bar and concrete. because of the construction sequence, the structure of secondary stress will be different. The secondary stress, is likely to impact on the safety of the structure. In this paper, based on the new LiuDong district enterprise headquarters office building construction, studying the overall improve the influence of the construction method of steel reinforced concrete structure.A headquarters office building in LiuDong district is a monomer project, including two layer underground and twenty layers on the ground. Its structure form is frame core tube structure(with truss transition layer). The transformation layer have four steel truss, located in 7~15 floors. The net span of steel truss is 50.60 meters and the height is 34.30 meters. The distance from steel truss to the basement bottom is 35.60 meters and to the assembly ground is 34.60 meters. The transformation layer steel truss of this project used the new form of reinforced concrete structure, the original design of the construction method is to build steel skeleton and pour concrete layer by layer, but this method has a long construction cycle and is not easy to implement. This article propose the overall lifting for the steel skeleton firstly, and then pouring concrete layer by layer, forming the steel reinforced concrete structure, this method is convenient to construction with a short period and a less cost, but it needs the simulation analysis for the safety of the structure of construction process.This article firstly study the mechanical properties of steel reinforced concrete structure and the construction process of the overall lifting of the structure in detail, then study the structure stress analysis in the overall uplift of steel truss and the load conversion, latter in the process of concrete pouring, we anlyze the pouring support structure and the foundation bearing capacity, finally, the simulation analysis of steel reinforced concrete structure is done in the process of pouring concrete layer by layer. For the analysis of construction process of transformation layer steel truss, we use the method of step-by step model and simulate the changes of its internal force in the construction process. The results show that the overall uplift method of steel reinforced concrete structure could ensure the safety of the structure. The research method and conclusions of this article provide the basis for the stress safety and construction measures in construction process of steel reinforced concrete truss, and also provide the experience for the design and construction of similar structure.