Experimental Study and Numerical Simulation on the Tensile Bearing Capacity of Bolt-Sphere Joints After Chloride Corrosion
Bolt-sphere joints have been widely used in space grid structures to connect members and trans-fer loads,because of the advantages of clear force and simple installation.However,corrosion is one of the important factors that affect the service life of grid structures.Cyclic spray simulation test was used to study the influence of chloride corrosion on the tensile bearing capacity,failure mode and corrosion mass loss rate of bolt-sphere joints.It was concluded that the tensile bearing capacity of bolt-sphere joints decreased grad-ually with the increase of corrosion time.In addition,the corrosion mass loss rate of specimens gradually increased with the increase of corrosion time,and as long as the corrosion time was the same,the corrosion mass loss rate of specimen with screw-in defects was not significantly different from that of specimen without screw-in defects.Finally,a model suitable for simulating the tensile bearing capacity of bolt-sphere joints was established by finite element analysis,and the simulated results were in good agreement with the exper-imental results.
NETL
NSTL
万方数据
