sagging moment

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sagging moment

n
(General Engineering) a bending moment that produces concave bending at the middle of a simple supported beam. Also called: positive bending moment
References in periodicals archive ?
Positive Bending Moment and Small Eccentric Compression
A segment joint force diagram under positive bending moment and small eccentric compression is shown in Figure 3(a); assuming the stress in the diagram is positive, the following equations can be obtained based on static equilibrium:
A stress analysis chart of the equivalent section under positive bending moment and small eccentric compression can be established based on the equivalent principle of the stress state of cross section, as shown in Figure 3(b).
where [E'.sub.eq] is the equivalent elastic modulus under positive bending moment and small eccentric compression of equivalent beam element.
Positive Bending Moment and Large Eccentric Compression
A segment joint force diagram under positive bending moment and large eccentric compression is shown in Figure 5(a).
Both slabs were treated as simple beams with a region that contained positive bending moment and theoretically no shear.
7 illustrates the comparison between the maximum positive bending moments (M+) in the three types of underpasses caused by the two code loads.
A parametric study was conducted in order to evaluate the importance of the thickness of the arch and that of the cover soil on the load distribution factors for positive bending moments. In the present study, only underpass PA2 subjected to the effects of two lateral load trucks defined in EC1 was considered.
In an elastic analysis, their action effects may be calculated using tabulated ratios of negative and positive bending moments.
where [q.sub.el] is a uniformly distributed load in elastic stage ([q.sub.el] [less than or equal to] [q.sub.el ul]) and [q.sub.el ul] is the ultimate value of this load; [M.sup.- .sub.el] and [M.sup.+.sub.el] are the maximum values of negative and positive bending moments, respectively, in beam elastic stage.
where [q.sub.ul] is a uniformly distributed load in ULS and [M.sup.-.sub.pl] and [M.sup.+.sub.pl] are the maximum values of negative and positive bending moments, respectively.
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