Refined Finite Element Analysis Of Prestressed Fabricated Joints

Construction industrialization and the disaster repair is the goal of structural engineering development and trends. Prestressed fabricated structures combining with the precast structure and the prestressed structure respective advantage is effective means to realize this goal. However, this structure form also has characteristics of small damping and seismic response, which is hindering it into the engineering application. The existing studies of prestressed fabricated structure is mainly test, which lacks a reliable and efficient refined finite element simulation method. This article basing on ABAQUS software platform for prestressed fabricated structure carrys out the study of refined finite element simulation, and the main contents are as follows:1) First, this paper Collects unbonded prestressed fabricated beam-column joints under reciprocating load test related parameters, which Including a cast-in-situ and three prestressed fabricated joints, and this is prepared for the structure finite element modeling.2) Secondly, this paper raises prestressed fabricated structure beam-column interface crack simulation method. This needs to create a reference point on the beam section,and uss the way of coupling constraints, and release the translational and rotational degree of freedom, and set surface-to-surface contact in the cross section. Experiment shows that this method can be well simulated on crack opening and closing process3) Finally, this paper carrys out the study of refined finite element simulation about prestressed fabricated joints. This paper respectively simulates three typical prefabricated specimens, it analyzes the test results and simulation results abaout the failure form, local reactions and hysteretic curve and skeleton curve. Research shows that the simulation results agreed with the test results in the above aspects, and it Indicates that this modeling method is basically reliable.