湖南大学学报（自然科学版）2016，Vol.43Issue(3)：1-7,7.
新型UHPC连续箱梁桥的体外预应力锚固构造形式研究
Study on Structural Forms of External Prestressing Anchorage for a Novel Continuous UHPC Box-girder Bridge
摘要
Abstract
According to the characteristics of a novel continuous UHPC box-girder bridge and the lay-out of its prestressing system,the anchor block for external tendons on the web was studied.Firstly,the effect of the plate thickness on the“local bending effect”in anchorage zone was evaluated through the anal-ysis of stress in the isolated rectangular anchor block.A simplified plane linkage model was proposed through the topology optimization in order to study the force transfer mechanism in anchorage zone.More-over,two kinds of methods were developed to strengthen the anchorage zone based on the simplified mod-el.On the basis of the above research procedure,six different anchoring schemes of the anchor block for the external tendons were designed.After analyzing and comparing the performance of the different ancho-ring schemes,the effects of diaphragms,steering of prestressing tendons,and anchoring length of the an-chor block on the mechanical behavior of the anchorage zone were evaluated.Finally,a type of reasonable anchor block of the external tendons was obtained.关键词
桥梁工程/构造形式/有限元分析/体外预应力锚固齿块/超高性能混凝土/薄壁箱梁Key words
bridge engineering/structural form/finite element analysis/anchor block of external ten-dons/Ultra-High-Performance Concrete(UHPC)/thin-walled box girder分类
交通工程引用本文复制引用
邵旭东,张良,张松涛,欧阳泽卉..新型UHPC连续箱梁桥的体外预应力锚固构造形式研究[J].湖南大学学报（自然科学版）,2016,43(3):1-7,7.基金项目
国家自然科学基金资助项目（51378194），National Natural Science Foundation of China（51378194）；广东省交通运输厅科技项目 （）
