| The 1994 Northridge earthquake and the 1995 Hyogoken-Nanbu earthquake arouse engineers to resurvey the behavior of end-plate connections. It is well known that end-plate connections have definite flexibility, which can increase damp, prolong period, and decrease swing of structure. So it can reduce the damage, and is one of best choices for resisting earthquake. To avoid casualties and decrease the loss in the future, analyses and response the damage mechanism of end-plate connections is significant for theory and practice.In engineering the manufacture inaccuracy and the irrational bolt distribution usually cause space between the end-plates. Fill plate is a simple way to cover the shortage. But the current code didn't involve the design method and constructional detail of the end-plate connection with fill plate. This piece is to study the design and reinforce method by finite element analysis and the reality model test. The influence of Pretightening force lose is also considered.This paper applies nonlinear finite element method to analyze the behaviors of connections under unidirectional load. The impact of thickness and amount of fill plates to limit load is consisted. The stress of end-plate, fill plate and bolt was analyzed. Contact elements are set between end plates, end plates and fill plate, screw cap and neighborhood plane, bolt bar and hole.In order to study the hysteretic behaviors of the end-plate connection with fill plate, six specimens of end-plate connection are compared under cyclic load. Tests consist of three parts: material property test of panel, slippage coefficient test of bolt connection and cyclic load test of end-plate connections. The impact of thickness and amount of fill plates and the increase of bolt diameter is considered. Base on the numerical calculation and test, the influence of end-plate connections with fill plate to the whole rigid frame is studied under uniform load, wind load and seismic load with a reality project. |
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