Study On Seismic Behavior Of Rammed Earth Wall Reinforced By Recycled Bamboo Reinforced

In our country,there is a large number of raw soil structures in villages and towns,and the raw soil structure is natural,which is good for environmental protection and ecological balance.However,the poor seismic performance of the raw soil structure itself has become an important factor hindering its development.In order to inherit and protect our precious architectural heritage and use modern science and technology to further develop,apply and improve this kind of architecture,carry out research work on raw soil structure and summarize a great deal of literature in the field of earth and soil structure research at home and abroad.Based on the research of rammed earth load-bearing wall,this paper put forward the idea of using renewable bamboo to reinforce rammed earth load-bearing wall,put forward five kinds of reinforcement schemes and carried out finite element analysis for the bearing rammed earth wall in rural houses,Broken ring shape,failure characteristics,bearing capacity,seismic performance and by comparing the five reinforcement solutions discussed to arrive at the optimal reinforcement program.The main research and results are as follows:(1)Studied and analyzed the failure modes of five kinds of reinforced rammed earth walls.It is found that the structural column and the bamboo net wrapped on the outer surface of the rammed earth wall reinforce the integral strength of the rammed earth wall so as to prevent the partial destruction of the rammed earth wall which is not reinforced and quickly lose its carrying capacity.(2)Through the analysis of the compressive bearing capacity of rammed earth wall,it is found that the bearing capacity of the strengthened wall is higher than that of the simple rammed earth wall.The efficiency of the strengthened wall is as follows: double side strengthening > single side strengthening > structural column strengthening > plain rammed earth wall.The results show that the rammed earth wall strengthened by double-sided inclined bamboo net has the highest bearing capacity under compression.It is twice the bearing capacity of unreinforced rammed earth wall.(3)The quasi-static analysis of five kinds of reinforced rammed earth walls is carried out.Analysis of the hysteretic curve and the skeleton curve of the bamboo wall reinforcement,the stiffness degradation and so on,we find that the shear wall bearing capacity of the reinforced wall has obviously improved,which shows that the rammed earth wall after the bamboo reinforcement is a kind of Effective reinforcement method;in carrying capacity,ductility,energy consumption,stiffness degradation,To evaluate the seismic performance of the wall with different reinforcement methods,it is found that the seismic indexes of the rammed earth wall with double-sided reinforcement are the best.(4)Study on the calculation method of shear strength of bamboo wall.Based on the simulation study,analysis of shear strength of bamboo wall reinforcement and combining with the reinforcement of the wall to perform theoretical analysis and numerical simulation,put forward the formula of shear capacity.The research in this paper provides an economic,reliable and scientific theoretical basis for the construction and reinforcement of rammed earth wall houses in villages and towns.