HPFRC复合梁桥负弯矩区受力性能的试验研究  

Experimental Study on Bearing Behavior in Negative Bending Moment Zone of HPFRC Composite Girder Bridge

作　　者：王海超[1] 于群[1] 王晓丽[1] 杨凤莲[1] 张红英[1] 

机构地区：[1]山东科技大学土木建筑学院,山东青岛266510

出　　处：《山东科技大学学报（自然科学版）》2010年第2期35-41,共7页Journal of Shandong University of Science and Technology(Natural Science)

摘　　要：为进一步研究钢-高强钢纤维混凝土复合粱桥负弯矩区的工作性能,制作了C50普通混凝土和C100钢纤维混凝土简支粱桥试件,对支座处承受负弯矩作用的情况进行了受弯承载力试验。混凝土与型钢采用无粘结的栓钉连接方式,同时对钢纤维掺量对高强混凝土的性能影响和裂缝开展过程做了研究。试验研究表明,高强钢纤维混凝土复合粱桥负弯矩区的整体工作性能明显高于普通混凝土复合梁桥,并且在一定范围内钢纤维增强作用也会随长径比增大而提高。该试验研究结果可为连续梁桥的设计提供参考。In order to further investigate the whole performance in negative bending moment zone of high perfor-mance fiber reinforced concrete（HPFRC） composite girder bridge,an experiment was conducted with two different test specimens of the simply supported beam bridge with the C50 general concrete and C100 steel fiber concrete and,the load bearing with negative bending moment at the pedestals was experimented.The incohesive pins were used in the connection of concrete and steel,also the research on the effect of steel fiber amount on the capability of high performance fiber reinforced concrete and the development process of cracks was conducted.The results of experiment showed that the whole performance of high performance fiber reinforced concrete（HPFRC） would be much higher than common reinforced concrete and the effect of steel fiber would be enhanced with the increase of length-diameter ratio.The results of the experiment can be the reference to the design of continuous beam bridge.

关 键 词：HPFRC复合梁桥 负弯矩区 钢纤维 长径比 裂缝 

分 类 号：TU375.1[建筑科学—结构工程]