Research On The Seismic Performance Of The Prefabricated Straw Composite Wall

The construction industry is one of the pillar industries in my country,and its development level directly affects the living standards of the people,so it has always been a key industry for national development.After the reform and opening up,the construction industry has entered a period of rapid development,playing an important role in stimulating the growth of the national economy.Today,the development level of the construction industry has long been measured by the amount of new building area.With the problems of high energy consumption,long cycle and heavy pollution in the traditional construction industry,the construction industry in the new era is moving towards green and energy saving.Development,and prefabricated buildings emerged at the historic moment,and received widespread attention due to their unique advantages.In addition,my country has a rich reserve of straw resources.Using straw as the raw material for new building energy-saving walls can not only avoid environmental pollution caused by straw burning,but also effectively alleviate the shortage of raw materials for new building energy-saving walls.Energy consumption in the construction industry provides new ideas.This paper takes the fabricated straw composite wall as the research object,and uses a combination of experimental research and numerical simulation to study the seismic performance of the fabricated straw composite wall.The main contents are as follows:1.Introduce the fabricated concrete building and the straw composite wall,organize and summarize the research status at home and abroad,and finally propose a new fabricated straw composite wall.2.Research on the anti-pressure performance of straw wall materials.Through the axial compressive test of the standard cubic specimen of straw wall material,the mechanical properties of the material such as the cubic compressive strength,axial compressive strength,and elastic modulus of the material are obtained.According to the test data,the simplified formula fitting method of concrete uniaxial compressive stress-strain is used to establish a high-precision constitutive model of the straw wall material under compression,which provides a basis for subsequent finite element simulation.3.An experimental study on the seismic performance of the fabricated straw composite wall was carried out.Through the pseudo-static test,observe the force and crack development and failure characteristics of the straw wall under repeated low-cycle loads,and obtain the hysteretic performance,skeleton curve,bearing capacity,energy dissipation capacity,ductility coefficient,etc.of the straw wall Seismic performance index.The results found that: the failure process of fabricated straw composite wall can be roughly divided into elastic stage,plastic stage and failure stage;the damaged parts of the wall are mainly concentrated in the connection parts of the wall panels.In actual projects,reasonable connection methods should be adopted to improve the wall performance.Mechanical performance;the wall has a full hysteretic curve and good energy dissipation capacity;according to the ductility coefficient and the ultimate displacement angle,it can be known that the straw wall has a good plastic deformation ability.4.The finite element simulation software ABAQUS was used to numerically simulate the straw wall,and the load-displacement curve,characteristic load,characteristic displacement and stress distribution cloud diagram of the wall model were obtained.Compare the finite element simulation results and test results to verify the rationality of the model.Analyzed parameters such as friction coefficient,wall thickness,axial compression ratio and aspect ratio of the straw wall.It is found that within a certain range,increasing the friction coefficient,wall thickness,and axial compression ratio can improve the bearing capacity;increasing the aspect ratio will reduce the bearing capacity,but can improve the ductility of the wall.In addition,a reasonable connection method can increase the bite force between the wall panels,thereby improving the bearing capacity and ductility of the wall.