The moment-curvature relationship chosen is assumed to have a horizontal branch beyond yield, with the moment remaining constant at the ultimate value.
所选用的弯矩-曲率关系是假定超过屈服后有一个水平段，即弯矩保持在极限值不变。
2
This article clears the measuring coupling relationship between horizontal azimuth and pitch angles by detailed mathematical deduction.
本文通过详细的数学推演，厘清了水平方位角与俯仰角测量耦合的关系。
3
Relationship curves between seam dip Angle, horizontal section height and roof deformation are derived, at the seam time, the criterion of failure is given in this paper.