The Research And Analysis On Seismic Performance Of Song Style Six Level Dovetail Wood Structure Based On Finite Element Technology

Ancient building structures mainly including wooden structure,soil structure,stone structure and brick structure.The structure of the ancient Chinese architecture is primarily the wooden structure,i.e,the frame of the house is made of wood beams and pillars and the beam and column is connected with the mortise and tenon joints in the ancient Chinese wood structure.The so-called dowel connection means that the end of the lap is made into a tenon form,the pillar is made in the form of Mao mouth,and a special way of connecting with the mortise.The tenon and mortise joints have many advantages.Whereas the joints are not completely closely connected.In addition,affected by hundreds or even thousands of years of internal and external environment,almost all of the components exist different sizes of gaps.In this paper,six modules are used as the "modulus" of the wooden frame structure.Based on the two-column frame,the finite element analysis software ABAQUS is used to built the model,and the parameters are set and simulated.The main results areas below:(1)Firstly,the model of the dovetail wood frame with different gap position is established by ABAQUS,and then vertical load and horizontal displacement are applied and researched.Under the different vertical loads,the horizontal reciprocating loading simulation of the joints of the tattoo and tattoo joints is made by means of seamless,side seam,end seam,displacement hysteresis curve,skeleton curve,stiffness degradation law and energy dissipation curve,and study the hysteretic energy dissipation and stiffness degradation of the four models.The results show that:(1)The hysteresis curve shape of all nodes is anti-Z.With the increase of vertical load,the hysteresis loop area becomes larger and as well as the increase of the stiffness,that is,the seismic performance of the wooden frame is enhanced.But the energy consumption is basically the same indicate that the size of the vertical load has no effect on the energy consumption of the dovetail wood frame.(2)Although the gap size is the same,the gap position is different,the impact on the wooden frame is also different.The hysteresis loop area,restoring force,stiffness and energy dissipation capacity of the joints are lower than those of the seamless tailed tenon wood frame,and the side seam has the greatest influence on the wood frame,i.e,the seismic performance of the side seam wood frame is the worst,the smallest horizontal stiffness,the worst energy consumption.While the end seam has the least effect on the structure of the dovetail.(2)The model of the dovetail wood frame is improved by adding aground beam between the two columns.Under different vertical loads,the force-displacement hysteresis curves,the skeleton curves,the stiffness degradation law and the energy dissipation capacity of the joint model of the groin-tailed tenon wood frame are obtained by simulating the horizontal reciprocating loading of the swallowtail joint under the beam.The results show that:(1)With the increase of the vertical load,the seismic performance of the wooden frame is enhanced and the stiffness is increases,but the energy consumption is basically the same,which means the influence on the size of the vertical load on the dovetail wood frame energy consumption is minute.(2)The hysteresis curves of the two models increase with the increase of the vertical load,and the hysteresis loop area increases.Compared with the non-geometrical structure,the hysteretic energy dissipation of the girdle-tailed tenon wood frame is stronger.The seismic performance is better;the stiffness is higher and the degradation is not obvious,which shows that the beams improve not only the whole of the horizontal stiffness,hysteresis energy consumption,but also effectively prevent the degradation of stiffness of the wooden frame.