用深受弯构件设计方法设计墩台盖梁

Bent Beam Designed with Design Method of Deep-Bending Members

墩台盖梁目前仍用一般受弯构件计算。据近 2 0年来的研究表明 ,当受弯构件跨高比等于或小于 5时 ,梁截面应变不符合平面假定 ,即混凝土的应变沿截面高度不符合线性分布。因此 ,在钢筋混凝土结构界 ,对于跨高比 L /h≤ 5的构件 ,称为深受弯构件 ,其计算方法不同于一般受弯构件。墩台盖梁跨高比绝大多数在 3～ 5之间 ,应按深受弯构件计算。

The bent beam is still designed using as an ordinary bending member at present. But the rearch in recent 20 years indicates that the strain of a beam section does not meet the assumption of plane cross section, i.e., the strain of concrete does not conform to linear distribution, therefore, the circles of concrete structure considers that the span depth ratio of a member equal to or lesser than 5 is a deep bending member. The design of a deep bending member is different from that of an ordinary bending member. The span depth ratio of a large number of bent beams is between 3 to 5, so they shall be designed as deep bending members.