STUDY ON THE MECHANISM OF SLIDING FRICTION SHOCK ISOLATION BETWEEN TIMBER COLUMN AND PLINTH IN HISTORICAL BUILDINGS

Based on the analysis of the form and characteristic plinth and timber frame columns in historical buildings,the sliding friction shock isolation systematic model is established and the column footing slippage criterion is given.With the FPK equation of random vibration theory,the calculation formula of the slippage displacement between column and plinth under white noise is proposed.The shaking table test on sliding friction shock isolation has also been carried out.It shows that buildings possess very good characteristic of energy dissipation and shock isolation,and the calculation results are consistent with the test results.It may provide theoretical base for seismic research on historical timber buildings.