（1 大连理工大学建设工程学部， 大连 116024； 2 中核能源科技有限公司，  北京 100193）

［摘要］基于塑性极限理论，对核电厂钢筋混凝土墙平面内抗剪问题进行了研究，给出了平面内受剪承载力的下限解和上限解。分析表明，当两个方向的钢筋均未屈服时，墙的平面内受剪承载力取决于混凝土的抗压强度；当一个方向的钢筋屈服而另一个方向的钢筋未屈服时，墙的平面内受剪承载力取决于钢筋的屈服强度和混凝土的强度；当两个方向的钢筋全部屈服时，墙的平面内受剪承载力取决于钢筋的屈服强度，此时混凝土的作用只是以压杆的形式将两个方向的钢筋连在一起并传递剪应力。对于两个方向钢筋均屈服的情况，下限解与上限解是相同的，因此属于理论上的精确解。

［关键词］核电厂； 钢筋混凝土墙； 平面内受剪； 塑性极限分析

中图分类号：TL48， TU375文献标识码：A文章编号：1002-848X(2018)16-0044-07

Study on in-plane shear of RC walls in nuclear power plant based on the plastic limit theory

Gong Jinxin1, Sun Yunlun2, Zhang Nailong1

(1 Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian 116024, China; 2 Chinergy Co., Ltd., Beijing 100193, China)

Abstract:A study on in-plane shear of RC walls in nuclear power plant based on the plastic limit theory was done, the lower   limit solutions and the  upper limit solutions were presented. It is revealed that in the case of the reinforcement neither yielding in two directions, the in-plane shear strength depends on the compressive strength of concrete. When the reinforcement yielding only in one direction, the in-plane shear strength depends on the yielding strength of reinforcement and the compressive strength of concrete. When the reinforcement yielding in two directions, the in-plane shear strength depends on the yielding strength of reinforcement and the concrete only plays a role of transfer of shear by linking the reinforcement. For the last case, the lower limit solutions  and the upper limit solutions are coincident, implying an accurate solution in theory is found.

Keywords:nuclear power plant; reinforced concrete(RC) wall; in-plane shear; plastic limit theory

*国家科技重大专项（2014ZX06902011）。

作者简介：贡金鑫，博士，教授，博士研究生导师，Email:jinxingong@163.com。