STUDY ON SEISMIC EFFECTIVENESS OF TIE UP METHOD FOR FIXING CULTURAL RELICS BASED ON SHAKING TABLE TESTS

To study the seismic effectiveness of the commonly used tie up method for fixing cultural relics, two typical cultural relics specimens were selected, and the shaking table tests of cultural relics specimens-fixed measure seismic system were carried out to obtain the seismic responses of cultural relics specimens and the interaction responses between cultural relics and fishing lines under different working conditions, and then the seismic effectiveness of typical tie up method was verified. The corresponding finite element models were established, and parameter analyses were carried out, which provided a necessary technical method for supplying test data and quantifying evaluation method. The results show that : the finite element results agree well with the test results. In the case of larger peak acceleration of earthquake wave, the motion states of different types of cultural relics are different. The lower the centre of gravity is, the smaller the rocking responses are, but the overall sliding responses slightly increase. Compared with the floating cultural relics, the rocking responses and sliding responses of cultural relics are effectively reduced by using tie up method. The seismic responses of cultural relics and the variation range of the internal force of the fishing lines are significantly reduced by appropriately increasing the initial pretension of fishing lines. However, when the initial pretension is too large, the reaction force on cultural relics is large. For the fragile cultural relics, some cushions between fishing lines and cultural relics can be used to reduce the local damage to cultural relics. With the increase of the initial pretension of fishing lines, the influence of the number of fishing lines on the responses of cultural relics is weakened. In the case of identical conditions, the larger the height-width ratio of cultural relics, the larger the seismic responses, and the larger the variation range of internal force of fishing lines, it was suggested to increase the initial pretension of the fishing lines to achieve better fixed effect.