초록 ▼

A warpable beam allowing a controlled degree of torsional resistance. The beam is formed with an open cross-section channel-shaped structural element (24) that includes a plurality of planar structural elements (28) or (32) that are positioned within the open section and that define the cross sectio

A warpable beam allowing a controlled degree of torsional resistance. The beam is formed with an open cross-section channel-shaped structural element (24) that includes a plurality of planar structural elements (28) or (32) that are positioned within the open section and that define the cross sectional shape. A plurality of diagonal structural element s(46) or (48) positioned transversely within the open section and interfaced with the planar elements transmitting shear across segments. A plurality of points of restraint (50) control the warping of the beam as a result of their relative motion. Further, oppositely inclined diagonal elements in different segments are connected in such a manner as to allow relatively free longitudinal motion while transmitting loads. The beam may be used for bridges or boat docks or as a leading edge spar (57) of an airfoil.

대표청구항 ▼

A warpable beam having controlled torsional resistance composed of elements which comprise: (a) an open cross-section channel-shaped structural element having a top, bottom and an interconnecting web with the top and bottom being in an essentially parallel relationship and having within the open sec

A warpable beam having controlled torsional resistance composed of elements which comprise: (a) an open cross-section channel-shaped structural element having a top, bottom and an interconnecting web with the top and bottom being in an essentially parallel relationship and having within the open section a gap that implies torsional flexibility therewith, (b) a plurality of planar structural elements fixedly positioned within the open section of the channel-shaped structural element normal to the axis and, separating longitudinal segments thereof maintaining the shape of the open cross section of the channel-shaped structural element without preventing relative longitudinal motion across the gap, (c) a plurality of diagonal structural elements positioned transversely between the top and bottom of said channel-shaped structural element across the gap and interfacing at the intersection of a planar structural element and the channel-shaped structural element on the first end and on the second end translatably interfacing with a next planar structural element and longitudinally connected to an oppositely inclined diagonal structural element in a different segment, (d) a plurality of support interfaces located on the open cross-section channel-shaped structural element where the motion of said interfaces control the warping of the beam and, (e) means to connect the oppositely inclined diagonal structural elements in different longitudinal segments of the channel-shaped structural element within the gap transferring loads to one or more of said planar structural elements in their plane, allowing relatively free longitudinal motion across the gap and transmitting longitudinal loads from one oppositely inclined diagonal structural element to the other where the elements of the beam jointly resist loads applied to the beam, and transmit their resultant to said support interfaces.