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
Hand calculation includes substitute rigid frame method under horizontal loads and moment distribution or decomposed storey method under vertical loads.
水平荷载作用下内力的计算用替代刚架法，竖直荷载作用下内力的计算可用弯矩分配法或分层法。
3
Total coefficient of modulation of moment for the frame applied horizontal load and vertical load is bigger than that of the same frame applied vertical load.