Research On Seismic Capacity Of The Composite Wall With Longitudinal Reinforcement Ribs Structure In Rural Area

Multi-ribbed composite wall structure is a kind of prefabricated building structure system which have ecology,energy conservation and seismic features.Many projects show that there are many defects such as lack of large-scale construction equipment,relatively high engineering cost and long construction period,when it applying to the rural areas.The composite wall with longitudinal reinforcement ribs structure is derived from multi-ribbed composite wall structure,which mainly composed by lightweight block and hidden frame.It has many advantages such as simple construction technology,low dependence on large-scale construction equipment and low engineering cost,which in the maximum to retain the excellent characteristics of the multi-ribbed composite wall at the same time,and fully make up for the deficiency of the fabricated structure applied in remote areas.Based on the demonstration project of our research group,this paper using the response spectrum method and time-history method to study the seismic capacity of stiffening rib composite wall structure.The main contents and conclusions of this research are as follows:?1?Combining with the demonstration project to introduce the construction process and construction technic of stiffening rib composite wall structure.Using pulsating method to measure the vibration characteristics of stiffening rib composite wall structure,and according to the self-vibration period of the structure to determine its seismic influence coefficient.The results show that the direction of X and Y self-oscillation periods of this structure is 0.052s and 0.055s respectively,and?₁ is in the linearly increasing segment of the earthquake influence coefficient curve.When using?_maxax to calculate the seismic action of structure,the results are more safety.?2?Using the equivalent elastic plate mechanical model of the composite material to obtain the equivalent elastic constants of the elastic stage of the wall.The calculation of the lateral stiffness of the open hole wall and the non-open hole wall is deduced,and the seismic capacity of stiffening rib composite wall structure is calculated by using static method.The calculation results of the SCW-7 and XQCW-1were 12.0%and-3.7%respectively,and the SCW-8 and SCW-9 were 19.8%and 12.2%respectively,compared with the experimental values.The seismic effect of the wall of the structure are far less than the shear capacity of the wall.Stiffening rib composite wall structure under the effect of frequent earthquake at the elastic stage,it won't be damaged.?3?Establishing the finite element model doing the elasticity and elastic time-history analysis of the structure.According to the results of time-history analysis to analyze the failure characteristics and mode of the structure,and the seismic capacity of the structure is evaluated.The results show that the spectral characteristics of Lanzhou artificial seismic wave is the closest to the characteristics of the structure.The deformation of the wall is mainly shear deformation,the maximum interlayer displacement angle of the floor interlaminar displacement angle is 1/13478,and the displacement of the structure is small,which satisfies the seismic requirement of the structure at 8 degree earthquake.The maximum interlaminar displacement angle is 1/773 in the case of 8 degree rare earthquakes,it can demonstrate that the stiffening rib composite wall structure has strong seismic capacity.