Elasto-plastic Analysis Of Prefabricated Shear Wall With Alveolar And Rabbet-unbonded Horizontal Connection

At present,the construction industry in our country is developing rapidly towards the building industrialization,and the fabricated shear wall structure is one of the most important prefabricated structure forms.The reliability of the upper and lower wall connection is the key to ensure the seismic performance of the structure.In order to improve the shear strength and seismic performance of the fabricated shear wall,on the basis of contrast with the finite element analysis and the test of the component,the whole finite element analysis of the whole shear wall structure with horizontal alveolar and unbonded type connection is carried out to study the seismic performance of the structural system.the main contents and achievements are as follows:(1)The force mechanism of the unbonded area of horizontal alveolar and unbonded type connection is analysed,and the constitutive model of the unbonded area is put forward.This constitutive model is applied to the finite element simulation of the component,and the validity and accuracy of the constitutive relation are verified by comparison with the experimental results.The fast modeling of the whole structure is realized.(2)The Pushover analysis is carried out on the overall structure of the shear wall with horizontal alveolar and unbonded type connection,and the aseismic performance is compared with the plane section fabricated shear wall structure and the cast-in-situ shear wall structure.The results show that the seismic performance of the structure basically reaches the same seismic performance of cast-in-situ shear wall structure,and reach the seismic fortification target of "small earthquake not bad,moderate earthquake repairable,great earthquake not collapse".The influence of unbonded length and unbonded degree on the seismic performance of the shear wall structure with horizontal alveolar and unbonded type connection is analyzed,and the design suggestion value is put forward.(3)The dynamical and time-history analysis is carried out for the fabricated shear wall with the design suggestion value.The seismic performance is evaluated by the energy method,and it is compared with the plane section fabricated shear wall structure and the cast in situ shear wall structure.The results show that the energy dissipation capacity of the structure is superior to that of the plane section fabricated shear wall structure,which is equivalent to the energy dissipation capacity of the cast in situ shear wall structure,and it shows that the structure has good seismic performance..This paper analyzes the composition of the interlayer displacement of the whole structure and calculates the harmful drift angle of the structure.The result shows that the harmful drift angle at the weak layer which has a large gap with the standard limit is far less than the story-drift story-drift,and it has enough safety degree.The influence rule of unbonded length and unbonded degree on harmful drift angle is analyzed,and the limit value of harmful drift angle of structure is given by energy method.Finally,the main research results and the existing problems are summarized,and the follow-up research directions are put forward.