Research On Shaking Table Test Of New Steel Wire Meshes Concrete Building Structure

New steel wire meshes concrete building structure is an energy-saving combined structure that integrates heat insulation and load bearing.In this structure,the cast-in-situ steel wire meshes concrete wall is used as the main load bearing member,and the thin-walled cold-formed steel is used as the construction column and ring beam.Compared with traditional masonry structures,it has better overall performance,better seismic performance,lower energy consumption,lighter deadweight and cost economy.It is especially suitable for multi-storey residential buildings and has broad development space.In this paper,the seismic performance of the new composite structure was studied,and the specific processes include: Seismic simulation shaking table test was carried out on a 1:3 scale 3-story integral structure;Test structure dynamic characteristics;Observe and analyze the failure process and failure state of the structure;The dynamic response of structures subjected to earthquakes with different fortification levels is studied to reveal the weak parts and possible failure modes of structures.Then,according to the current seismic design code,the seismic performance of the structure is comprehensively evaluated by taking the inter-storey drift angle as the seismic performance evaluation index.Through the above studies,the following main conclusions are obtained: the first third order frequencies of the prototype structure are 5.01 hz,10.04 hz and 19.54 hz,with relatively large model stiffness and sparse frequency distribution.After a rare earthquake of 9 degrees,the first third order frequencies of the model are only 58.8%,57.6%,and 59.3% of the initial frequency.According to the damage performance of the model,the damage of the first layer of the structure is more serious than that of the second and third layers.At the same time,in a layer of wall,the walls with an opening rate of 32.2% has a more severe damage than the walls with an opening rate of 21.4%,and the damage is concentrated at the corners of the hole;thin-walled cold-formed square steel tube columns and ring beams delay the development andpenetration of cracks,and the ductility and seismic performance of the structure are significantly improved.From the perspective of the dynamic response of the structure,at the initial stage,the 7 degree rarely encountered intensity action and before,structure under the effect of lanzhou wave response is the largest.As the earthquake action increases,the degree of plasticity of the structure deepens,and the period becomes larger,the structure responds the most under the action of Taft waves,indicating that the seismic response of the structure is closely related to the spectral characteristics of ground motion.The the inter-story drift angle is used as the basis for evaluating the structural performance level,and the seismic performance of the structure is evaluated.The structure meets the three-level seismic fortification targets of “ small earthquakes are not bad,moderate earthquakes are repairable,large earthquakes are not falling down”;The seismic performance of the structure is evaluated based on the inter-storey displacement Angle,which meets the three-level seismic fortification target of “small earthquake is not bad,medium earthquake is repairable and large earthquake cannot be destroyed”.The structure designed in accordance with the 7-degree fortification intensity can meet the requirements of the codes under the action of 8-and 9-degree earthquakes,indicating that the structure has a high safety reserve,good seismic performance and a wide range of applications.