鋼筋混凝土框架柱地震損傷模型研究
[Abstract]:Earthquake as a devastating natural disaster, its occurrence will often bring different degrees of damage to the building structure, but also to people's lives and property serious impact. Reinforced concrete structure is one of the most widely used structures nowadays. Frame columns as the main lateral force resistant members make scholars pay more and more attention to their research under earthquake action. In this paper, the damage evolution law of frame column under earthquake action is obtained by combining theoretical analysis with numerical simulation. The ANSYS finite element model is used to simulate the design of 10 RC frame column members under low cyclic loading, and the displacement and internal force of each member are obtained. The hysteretic curve and skeleton curve of each component are obtained, and its seismic performance is analyzed. Based on the analysis of the advantages and disadvantages of the existing single-parameter and two-parameter seismic damage models at home and abroad, a new two-parameter seismic damage model for reinforced concrete frame columns is proposed by using the principle of damage mechanics. In the model, the damage degree of the structure is expressed by the linear combination of the two failure parameters of maximum deformation and cumulative hysteretic energy dissipation. The experimental parameters of the model are determined according to the low cycle repeated loading test results of the simulated RC frame column members. The new model is compared with the known experimental data and the park-Ang model to verify the accuracy of the proposed model. The simulation data are introduced into the earthquake damage model presented in this paper to calculate the damage index of each component, and the influence of various factors, that is, shear span ratio, axial compression ratio and concrete strength, on damage evolution is analyzed. This provides a reference for seismic design calculation of reinforced concrete frame columns based on performance.
【學(xué)位授予單位】:西安科技大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2016
【分類號】:TU375
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