This paper puts forward a new box strengthen-joint region connection for weak axis of I-section column. A full-scale test of frame side joint with reduced beam section under monotonic loading is carried out based on the proposed joint. A general finite element software ABAQUS is used to simulate the mechanical behavior of the joints under monotonic loading

and the simulation results are in good agreement with the experimental results. In order to study the effect of various factors on the performance of this kind of joint

a series of parameters analysis under cyclic loading

is employed through finite element method. What the analysis results show are as follows: the maximum plastic rotations are bigger than 0. 03 rad; the plastic hinge appears in the reduced beam section

with joint region and I-section column still being in elastic state

which accords with the seismic design principles of "strong column and weak beam"

and "strong joint region"; different weakening parameters have a certain effect on the bearing capacity

stiffness

rotation ability and ductility of the joints. For the new weak-axis connections

it is appropriate that the distance between skin plate and reduced beam section is about 0. 5

0

. 75 times the width of beam flange

and the length of reduced beam section is about 0. 65

0

. 85 times the height of beam section

and the cutting depth is about 0. 2

0

. 25 times the width of beam flange.