Test and Analysis of Dynamic Characteristics of Box-reinforced Reinforced Concrete Shaft Tower in Coal Mine
Structural dynamic characteristics are important parameters for evaluating the safety and seismic performance of existing building structures.The on-site evaluation of the structural dynamic characteristics of the box-reinforced concrete coal mine shaft tower by ambient excitation method was conducted.In the meantime,the finite element method for calculation and analysis was also carried out.The results show that the accuracy of theoretical calculation results can be verified by measuring the dynamic characteristics of existing coal mine shaft towers,the actual stiffness of the structure can meet the design requirements,and the stiffness degradation effect of the structure is relatively weak since its service.The measured translational vibration patterns are in good agreement with the calculated results and no obvious anomalies are found.The test results can verify the accuracy of the calculation method and results,provide a basis for the safety assessment and seismic checking calculation of existing engineering structures and provide technical support for the later capacity expansion transformation.
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