Shear and the distance d
Shear and the distance d
(OP)
Regardless of reinforced masonry or concrete the shear requirement from the face of the support to a distance of d from the support is the shear at the distance d for a flexural member. Several conditions one of which is, no CONCENTRATED load can be within the distance d. Fine. If you are designing a lintel or header over an opening in a wall and you have a concentrated point load above at the top of the wall, say a reaction from an OWSJ, the general procedure is to distribute this point load at an angle of 60 degrees until a prescribed maximum width is reached thus converting the concentrated point load into a uniformly distributed load. And lets say in this case an OWSJ reaction is with in the distance d from the edge of the lintel/beam or opening. Question is, is this a concentrated load? Does the requirement of utilizing the shear value at a distance d apply or not? Thanks.
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RE: Shear and the distance d
Depending on which code you are using, this is not necessarily onerous. For the Australian code AS3600 and British code BS8110, there is a factor that increases shear capacity in this zone anyway so you are not being disadvantaged.
The only other option would be strut-tie analysis and design.
RE: Shear and the distance d
If not, the loads are considered to be spread out enough such that the reduced shear can be used.
RE: Shear and the distance d