摘要
双向板按全塑性分析求极限荷载,是钢筋混凝土结构教学中的一项重要内容.通常是按虚功法或板块极限平衡法推导极限荷载公式.虚功法是常用的方法.该方法的关键步骤是求各塑性铰线极限弯矩在假定虚位移下所作的内功,其中对于板缺的相对转角有多种求法.本文通过求斜铰线相邻扳块的相对转角来求斜铰线极限弯矩在给定虚位移下作的内功,使极限荷载公式的推导思路清晰、易于理解.
The calculation of the ultimate load of two-way slabs with the plastic analysis method is important in teaching reinforced concrete structure. Usually virtual work or limit balanced plates are used to derive the ultimate load formulae for slabs. The method of virtual work is in common use. The key step of itis to calculate the internal virtual work performed by the ultimate bending moment of each yield line when the slabs are deformed virtually. The internal virtual work performed by the ultimate bending moment of the inclined yield line can be calculated by finding the relative rotation between two plates being linked by the inclined yield line.
出处
《石油大学学报（自然科学版）》
CSCD
1992年第6期131-133,共3页
Journal of the University of Petroleum,China(Edition of Natural Science)
