Study Of Shaking Table Tests On The Model Of Cylindrical-supporting Group Silos Structures

Silo has become the national economic construction in China as an important structures of reinforced concrete construction, the number of silo is increasing, and so is the capacity of single silo. With the change from single warehouse to group warehouse, which has gradually become dominant positions, but due to the lack of appropriate type of theoretical analysis and experiment, the seismic analysis of design theory and method,silos seismic analysis and design theory are almost empty. As the current specification that there is no corresponding provision in, it brings some blindness. China belongs to the state, as the most serious earthquake zones, and most part are situated in the earthquake zones, thus it is necessary to analyse the anti-seismic performance of storehouse.In this paper, the immediate transfer of Zhoushan provincial grain storage project engineering background, in civil engineering from Tongji university in prevention of state key laboratory, researchers designed a cylinder-supporting shaft structure of a group of warehouses1/16 model and simulated seismic shaking table tests of different intensity in the input, ground motion situation, through the white noise frequency sweep, they obtained different frequencies of structure model under varied conditions, and acquired the model of the structure of displacement and acceleration, and storage of strain response of the lateral pressure warehouse wall of data. Through the observation and record of model structure , they examined the structural model of the failure modes.Through the analysis of test data, the variation of the earthquake was received that food materials to the silo wall under the action of lateral pressure, and the dynamic characteristics and seismic response of the grain of tube wall materials was studied. Compared with single storage structure, to study the seismic performance of silos by the model structure similar to the relationship according to the projection of the seismic response of the prototype structure, the mechanism and seismic performance of the damage has been studied. Some useful conclusions were received--- cylinder pile type made by the reaction of warehouse structure mode, the high-order mode by less influence. Silo's dynamic lateral pressure values are higher than the static lateral pressure values, and improve with the increasing of the acceleration table, in seven degrees and basic seismic intensity, storage to warehouse wall lateral pressure increases, but in less severe seismic intensity, the lateral pressure increased significantly larger. The number of combinations of the storehouse stiffness significantly increased, but not the simple combination. In group under the action of earthquake damage is not obvious, the seismic performance is better than single storehouse, which satisfy the requirements of seismic code currently. And the pillars and the cylinder pile bearing type cylinder of the covenant experimental results were analyzed and studied under different support form the covenant of cylinder anti-seismic performance.Based on shaking table test, pile type cylinder cylinder structure made of warehouse anti-seismic performance were studied, and some useful conclusion were obtained. Finally, some suggestions and problems were put forward for the further research.