How to check and determine the length of stair reinforcement?
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How to check and determine the length of stair reinforcement?
No one seems to have answered this question, so let me answer it. The negative reinforcement of the stairs should be calculated according to the negative reinforcement of the plate. The formula is roughly like this. If the length of one side is L, the width of the support is A, the negative reinforcement is 2L + A + the bending length of both sides. For details, you can refer to the Glodon software. There is a special calculation for the amount of steel bars, which seems to be all available.
two moderators: Can you explain, what is a negative muscle?
Negative reinforcements should be "auxiliary reinforcements" that play an auxiliary and supporting role in the structure. They generally assist the main reinforcements. For example, the steel bars at the four corners of the beam are the main reinforcements, and the square steel bars surrounding the main reinforcements are the auxiliary reinforcements, commonly known as stirrups. It is the slab erecting steel bar at the support of the cast-in-place slab, also called "buckle bar", which is ∏-shaped. This post was last edited by Lai Lai on 2009-4-17 18:40 ]
My understanding is that the auxiliary reinforcement should have the same meaning as the distribution reinforcement, which plays the role of supporting and fixing the main reinforcement. The negative reinforcement in the plate is the steel bar that bears negative bending moment, so it is called negative reinforcement. Negative bending moment means that the plate bears upward bending moment, and downward bending moment is positive.
The negative bars in the slab are steel bars that bear negative bending moments, and are calculated according to the overlapping length required by the drawings and specifications.
Usually the thickness of the two protective layers is deducted to calculate the length of the bent part!