Study On The Mechanical Properties And Intelligent Monitoring Of New Lattice Integrated Wall

Expansive polystyrene granule cement latticed concrete wall,which is in line with China’s development concept of green,energy-saving,and environmental protection,has been widely applied in northern China.Its application,however,is limited in high-rise buildings due to its poor lateral bearing capacity.To address this problem,based on existing research results,this paper proposed two novel kinds of latticed concrete walls,namely reinforced lattice columns and inclined lattice columns,and studied their related performances.Besides,to promote the development of intelligent monitoring of the lattice concrete wall,this paper designed a novel intelligent health monitoring system.The main work and conclusions are as follows.Firstly,a numerical analysis model of the latticed concrete wall was constructed,and its mechanical properties under low cyclic load were investigated.Then,comparing the failure modes and related mechanical properties of the wall by the numerical simulation method of finite element with the experimental results,it was found that they were basically consistent and the error was within the acceptable range,which verified the accuracy of the model.Secondly,based on the equivalent stiffness principle,the equivalent elastic modulus of the latticed concrete wall under different stress states was calculated by the numerical simulation method of finite element,and the influence law of concrete strength grade on it was obtained.Thirdly,the seismic behavior of the reinforced lattice columns was analyzed by the numerical simulation method of finite element.Moreover,by comparing the hysteretic curves,damage nephogram,ductility coefficient,stiffness,and equivalent viscous damping ratio,the optimal arrangement of the columns was obtained.Fourthly,through the numerical simulation method of finite element,the deformation and lateral bearing capacity of the lattice concrete wall at different tilt angles were analyzed under lateral load,so that the wall’s optimal tilt angle was available.In addition,improvements for the damage and deformation of the inclined lattice columns under vertical load were suggested.Fifthly,the intelligent health monitoring system was studied from aspects of sensor technology,data transmission and communication,and a safety evaluation algorithm.Based on the first-principles calculation method,the feasibility of transition metal sulfides as an ideal building sensor sensing material was clarified.Based on wireless sensing technology,the self-designed data transmission node equipment can perform data preprocessing and bi-directional data transmission with computing terminals;Then,this paper verified the forecast accuracy of the BP neural network optimized by the particle swarm algorithm for the stress condition of the lattice wall and clarified its feasibility as a security assessing algorithm.This paper provides certain references and theoretical guidance for the follow-up tests and productions of the lattice concrete wall,thus providing a technical way to improve its performance.