钢纤维混凝土桥面抗裂性能及设计和施工技术  

Cracking Resistance Performance of Steel Fiber Reinforced Concrete Bridge Floor and Its Design and Construction Techniques

作　　者：王钧利[1] 

机构地区：[1]长安大学公路学院公路桥梁与隧道陕西省重点实验室,西安市710064

出　　处：《公路》2006年第4期124-128,共5页Highway

基　　金：西部交通建设科技项目(200231822329)

摘　　要：基于混凝土断裂力学的基本理论,通过分析钢纤维的阻裂作用和增强效果,对钢纤维混凝土的抗裂度和裂缝宽度的计算模式进行探讨,提出了相应的公式.通过对已建钢纤维混凝土桥面长期使用性状的分析,对钢纤维混凝土桥面设计中的钢纤维类型、用量、剪力筋的设置及施工工艺等提出了具体要求.通过力学性能和使用性能综合比较,铣削型钢纤维是最佳选择;钢纤维用量的体积比宜为0.6%～1.0%;施工时选择适宜的水灰比和振捣器具.On the basis of the fracture mechanics theory of concrete, the cracking resistance function and reinforcing effects of steel fiber are analyzed. It is discussed that the method for calculating the cracking resistance and the width of the cracks in steel fiber reinforced concrete and the corresponding formula are presented. Through analyzing the long term performance of steel fiber reinforced concrete bridge floor, it is put forward that the steel fiber type and its dosage, the setting of shearing steel bar in design and construction techniques. Colligated all sides, the best steel fiber is milling type fiber; the dosage of steel fiber is 0. 6%-1.0%（volume ratio）; the most suitable ratio of water and cement and the most suitable shaker must be chosen.

关 键 词：桥梁工程 钢纤维混凝土桥面 断裂力学 抗裂性能 钢纤维用量 施工工艺 

分 类 号：U443.33[建筑科学—桥梁与隧道工程]