Abstract: Container buildings are assembled with many standard containers,and they have a good application prospect with the advantages of fabricated and modular buildings.However,most of the researches on container buildings focus on the architectural design or the mechanical performance of single box structure.The simplified simulation methodologies of corrugated plate wall and structural design method of container buildings are lacking.
By summarizing the structural analysis methods of corrugated plate wall,a simplified simulation method of corrugated plate wall with considering both the vertical bearing and horizontal lateral resistance is presented.Firstly,a corrugated plate wall model is established by using finite element software,and concentrated force is applied to the top end of the wall.The force-displacement relationship curves of corrugated plate wall are obtained through finite element analysis,the initial horizontal lateral stiffness of the wall can be calculated.Then the structural models of upper and lower beams and corner columns of the corrugated plates are setup in the design software,and the functions of the corrugated plate wall is simulated by cross braces,and the cross-sectional area of cross brace is calculated according to the stiffness equivalent principle.Thus,the simulation of the horizontal lateral stiffness of the corrugated plate wall is realized in the design software.Besides,each corrugation is simplified into a column with hinged upper and lower ends according to the principle of area equivalence,which is connected with the upper and lower beams of the containers,thus realizing the simulation of the vertical bearing capacity of the corrugated plate wall.
For multi-storey container buildings,the performance-based seismic design principle of high bearing capacity and low ductility is used according to China standard for design of steel structures(GB50017-2017).The members are strength checked according to the seismic forces under frequent and intermediate earthquakes,the plates in member section have lower ductility and the allowable width-thickness ratio of plates can be taken a larger value.
The method described above is used to analyze a two-storey container building functioning as a fire station with two parking spaces.The lateral stiffness of corrugated plate wall is figured out by using ANSYS software,and the stiffness reduction effect of wall openings is considered.In design software PKPM,the corrugated plate wall is simulated by equivalent cross braces and a certain number of columns with pinned connections at both ends,and the structural analysis model is established.According to the structure height and fortification intensity,the performance level is set as performance 3,the ductility level is set as grade V,and the width-thickness ratio of all plates is set as type S5.The bearing capacity of beams,columns and supporting members under frequent and intermediate earthquakes are checked.The results show that the maximum inter-story drift angle of the structure is equal to 1/527,the maximum stress ratios of the beam and the corner column on the second floor are equal to 0.92 and 0.35,respectively.All parameters meet the requirements of performance-based design.