Elastic-plastic Analysis Of Stell Tube-reinforced Concrete Column Structure

Stell tube-reinforced concrete column structure, Is a kind of structure system developed by our country. Compared with reinforced concrete columns and steel reinforced concrete column, it is more excellent with compression and seismic performance. It also has better economic and social benefits.According to the structure under different probability levels of earthquake under the action of performance or deformation of the requirement of design, it is the development trend of the current seismic design at home and abroad. It is a necessary component of the seismic design that the analysis of structure of the elastic-plastic time history. based on the sea and international industrial building projects,The stell tube-reinforced concrete column tall transfinite structural engineering, using the structural elastoplastic analysis to solve practical engineering problems, the paper is carried out the following work.(1)It has studied and expounded the seismic elastoplastic analysis of the oretical basis systematically. To clear and definite the main purpose of the clear seismic elastic-plastic analysis, and to understand building structure seismic elastic-plastic analysis consists of two basic elements.1、Structure of the elastic-plastic model.2、Earthquake input and omputation. After analysing the static elastic-plastic analysis of the deficiencies, it is emphasised on the dynamic elastic-plastic analysis.(2) It has introduced MIDAS BUILDING dynamic elastic-plastic analysis. Provided a shear wall model of the fiber, divided to a certain number of shear wall into the vertical and horizontal to the fiber. MIDAS BUILDING has adopted fiber constitutive relation which can reflect the concrete, steel bar material nonlinearity and the characteristics of the shear wall unit. Beam and column hinge feature values according to the calculation of reinforcement (considering the coupled coefficient) or solid reinforced calculation of construction, which makes the MIDAS BUILDING can relatively accurately reflect the seismic performance of practical engineering.(3) It has introduced concrete filled steel tube composite column structure and its design concept. Concrete filled steel tube composite column structure is a kind of structure system developed by our country. Compared with the reinforced concrete columns and steel reinforced concrete columns, it is more excellent with compression and seismic performance. It also has better economic and social benefits, with more and more applications in engineering.(4) It has applied dynamic elastic-plastic to stell tube-reinforced concrete column structure in practical engineering. Based on the transfinite super-tall structures for elastic-plastic analysis, to find out the weak parts of the structure at the same time, evaluation is unde the seismic performance of the structure. It is mainly through two aspects of performance index and components for structure as a whole to judge seismic performance. The structural integral evaluation index includes vertex displacement time history and elastoplastic interlayer displacement Angle and so on. Component performance evaluation indicators include studying the development of the plastic area, damage degree, stress and strain components, etc.