Numerical Simulation Of The Controlled Weak Layer Structure Of A C-shaped High-strength Steel Shell Unit

At present,the building is to follow the“The structure is not bad during small earthquakes,can be repaired during moderate earthquakes,and large earthquakes do not fall” fortification goal.However,after major earthquakes,most of the buildings must be pulled down to rebuild,can bring huge burden to urban rapid recovery and reconstruction.The purpose of this paper is to study a C-shaped high strength steel shell members and used in the structural system,achieve structure after the earthquake not repair or through the effect of fast repair can continue to use,to achieve“The structure is not bad during small earthquakes,can be repaired during moderate earthquakes,and large earthquakes can also be repaired” design concept.In this paper,the numerical simulation and calculation of the controllable weak layer structure based on the resettable c-shaped high-strength steel shell members are carried out.The main research work is as follows:(1)Compressive capacity of C-shaped high strength steel shell members,lateral resistance test and simulation analysis,it is concluded that C-shaped high strength steel shell members of compressive strength,strong ability to resist lateral comparison,can recover after unloading,only for the elastic deformation,and C-shaped high strength steel shell members before buckling restoring force is larger.For the convenience of calculation,the c-shaped composite steel member is equivalent to the beam element according to the section equivalence principle.The section characteristics of c-shaped composite members were analyzed before they were added into the structural analysis,and the equivalent girder element of c-shaped composite members and shell element were respectively analyzed and calculated and compared,and the calculated values weresimilar,indicating that the equivalent beam element could be used to introduce the structure for numerical simulation and research.(2)When sap2000 was used to pushover simulation analysis of the structure,the floor slab and filling wall were simplified and the plastic hinge was defined.Then the obtained capability curve is transformed into the capability spectrum curve to evaluate the seismic performance of the structure.When masonry fill wall is considered at the same time and new composite components are added at the bottom,the peak shear force at the bottom of the structure will be greatly increased.Model 4 is weak,as a result of the first hinge,and with the increase of load,the underlying damage occurs,so that after the earthquake,is only used to repair or replace the first layer of the pillars of the structure can make recovery use,saving the cost of a lot of time,labor and money,etc.(3)By simulating the static and dynamic elastic-plastic responses of different software structures under the action of horizontal one-way forces,and comparing the simulation results of component failure parts,deformation and displacement Angle under static and dynamic conditions,it can be concluded that the simulated values are similar in both cases.