Abstract: (Force-) Beating Area and,"Force-Transferring Area" exist on both sides of the bridge expanded joint.One of the main problems of causing the joint damage and shortening the life of the bridge is the defect and damage of the filling materials used in the areas.This paper describes,by means of finite element method,the inner-force of the "Force-Beating Area" and the "Force-Transferring Area",and points out the possibility of the replacement of the common concrete and other materials with SFRC in the two areas.And it's quite possible to prolong the life of the bridge by consolidating the expanded joints with SFRC.

Key words: (Force-)Beating Area, Force-Transferring Area, steel fiber reinforced concrete, expanded joint

摘要： 本文提出在桥梁伸缩缝两侧存在"拍击区"和"传力区",由于该区域内销装材料性能上的缺陷和损坏,是造成桥梁伸缩缝经常损坏,运营周期短的主要原因之一。利用有限元分析方法,本文分析了伸缩缝"拍击区"和"传力区"的内力。通过对钢纤维混凝土取代"拍击区"和"传力区"普通混凝土和其他材料的可行性和可能性进行研究,指出用钢纤维混凝土加固桥梁伸缩缝,延长其使用寿命是可能的。

关键词: 拍击区, 传力区, 钢纤维混凝土, 伸缩缝