First. Anti-wind column design
Generally, the wind resistance column is a structural component at the gable of the single-storey light-weight steel structure of the gate. The wind resistance column is not only the bearing and reconstruction frame of the gable envelope structure, but also transmits the horizontal wind force sustained by the gable through itself and the roof system The foundation and the design of the anti-wind column are indispensable steel structural members in the process of steel structure design and engineering, so we must pay great attention to it.
The standard model of the design and calculation of the wind resistance column with the hinged connection of the general portal rigid frame is shown in the figure. The column feet are hinged, and the top of the column provides horizontal restraints through the support system. The design of the wind resistance column is usually considered according to the flexural member: the plane wall purlin provides plane support to improve the stability of the flexural member. Where the bending moment of the wind-resistant column span is large, the wall beam corner brace shall be installed to ensure the stability of the inner flange under compression.
Second. support design
The cross supports and flexible tie rods in the portal rigid frame structure can be designed according to the tie rods, and the compression bar members and rigid tie rods in the non-cross support can be designed according to the press rods.
The internal force of the horizontal horizontal support on the rigid frame inclined beam can be calculated according to the longitudinal wind load according to the horizontal truss supported on the top of the column. At the same time, the force that the support acts on the inclined beam to reduce the calculated length must be taken into account; The force of the pressure bar.
The internal force of the support between the rigid frame columns should be calculated according to the vertical wind load received by the column row, according to the vertical cantilever truss supported on the column foot (including the crane, it is included in the longitudinal braking force of the crane), and also included in the support against the column To reduce the force required to reduce the calculated length, the stress on the cross support can be ignored. In addition, when the same column is provided with multiple inter-column supports, the longitudinal force can be considered according to the average distribution among the supports.
When the supporting member is tensioned or compressed, it needs to be calculated according to the provisions of the current standard on axial tension or axial compression members.
Among the support rods, the tie rods can be made of round steel, and the special connecting pieces are connected to the beams and column webs, and tensioned by flower basket screws. The cross bar or "T" cross section composed of double angle steel is used as much as possible for the pressure bar. The rigid tie bar designed according to the pressure bar can also use a round tube cross section.