DESIGN SPECIFICATIONS FOR HIGHWAY BRIDGES - IISEE
DESIGN SPECIFICATIONS FOR HIGHWAY BRIDGES - IISEE
DESIGN SPECIFICATIONS FOR HIGHWAY BRIDGES - IISEE
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(2) Failure mode of an Reinforced Concrete Columns subjected to an eccentric bending<br />
moment due to structural dead load shall be evaluated according to the criteria in<br />
Section 10.2 (1). However, lateral strength of an Reinforced Concrete Columns in<br />
judging failure mode shall be calculated by Equation (10.9.1).<br />
M<br />
P uE = P u - 0 ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ (10.9.1)<br />
h<br />
M 0 = D e ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ (10.9.2)<br />
where<br />
PuE: Lateral strength of the Reinforced Concrete Columns subjected to eccentric<br />
bending moment caused by the superstructural dead load (N)<br />
M0: Eccentric bending moment caused by the superstructural dead load (N・mm)<br />
Pu: Lateral strength of the Reinforced Concrete Columns as per Section 10.3 (N)<br />
h: Distance from the bottom of pier to superstructural inertia force (mm)<br />
D: Superstructural dead weight (N)<br />
e: Eccentric distance from the centroid of the pier section to the center of gravity of<br />
the superstructure (mm)<br />
(3) For a pier with flexural failure, lateral strength and ductility capacity shall be<br />
calculated by Equations (10.9.3) and (10.9.4), respectively.<br />
P αE = P uE ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ (10.9.3)<br />
<br />
uE<br />
<br />
yE<br />
<br />
E<br />
1 <br />
・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ (10.9.4)<br />
( )<br />
yE<br />
0E<br />
where<br />
PaE: Lateral strength of an Reinforced Concrete Columns subjected to eccentric<br />
bending moment caused by the superstructural dead load (N)<br />
μE: Ductility capacity of an Reinforced Concrete Columns subjected to eccentric<br />
bending moment caused by the superstructural dead load<br />
α : Safety factor specified in Section 10.2<br />
δ uE: Ultimate displacement of an Reinforced Concrete Columns subjected to<br />
eccentric bending moment caused by the superstructural dead load (mm)<br />
δyE: Yield displacement of an Reinforced Concrete Columns subjected to eccentric<br />
bending moment caused by the superstructural dead load (mm)<br />
δ0E: Initial displacement at the height of the superstructural inertia force, caused by<br />
the eccentric bending moment of the superstructural dead load (mm)<br />
64
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