沈阳工业大学学报2012，Vol.34Issue(2)：215-219,5.
预应力混凝土桥底板纵向裂缝控制
Control for longitudinal crack on bottom plate of pre-stressed concrete bridge
摘要
Abstract
In order to reduce the harmfulness of the longitudinal cracks on pre-stressed concrete bridge, the relevant provisions in Chinese Specification （JTG 1362-2004）, European Specfication （ENV1994-2：1997 ）, British Specfication （BS 5400-4： 1990） and American Specification （AASHTO LRFD Bridge Design Specification SI Units Third Edition 2004 ） were studied and compared. The scheme to control the longitudinal cracks on the bottom plate of pre-stressed concrete bridge with constraining the nominal tensile stress was proposed. A full-scale model test was used for the verification and analysis. The test results verify the feasiblility of the method well. The research results show that for the bridge structures designed with the full pre-stressed standard, the method of constraining the nominal tensile stress should be used to avoid the longitudinal cracks. If the transverse pre-stress can not be arranged, some conformational measures should be positively adopted to limit the width of cracks, and ensure the biggest width of cracks to be less than 0. 10 mm.关键词
预应力混凝土构件/桥梁底板纵向裂缝/规范研究/足尺寸模型试验/名义拉应力/裂缝宽度限值/U型梁/底板开裂模式Key words
pre-stressed concrete component/longitudinal crack on bottom plate of bridge/specification study/full-scale model test/nominal tensile stress/crack width limit value/U-shaped beam/bottom plate cracking mode分类
建筑与水利引用本文复制引用
吴迅,王艺桥,赵柏岩..预应力混凝土桥底板纵向裂缝控制[J].沈阳工业大学学报,2012,34(2):215-219,5.基金项目
国家863科技计划资助项目（2007AA11Z103）. （）
