东南大学学报（自然科学版）2017，Vol.47Issue(1)：112-117,6.DOI:10.3969/j.issn.1001-0505.2017.01.020
波形钢腹板混凝土组合箱梁纯扭性能全过程分析
Whole process analysis on pure torsional behavior of concrete composite box girders with corrugated steel webs
摘要
Abstract
To obtain the whole torque-twist curve of the concrete composite box girders with corruga-ted steel webs under pure torsion,a whole process analytical model for the pure torsional behavior of the composite box girders is established on the basis of two stages,before and after concrete cracking. As for the stage before concrete cracking,a correction formula for the elastic torsional stiffness of the composite box girders is proposed with considering the impacts of the cross-sectional aspect ratio and the shape of the corrugated steel webs.Moreover,a calculation formula for the cracking torque of the composite box girders is corrected through considering the effects of the steel bars and the prestressed tendons.As for the stage after concrete cracking,a nonlinear analytical method for the composite box girders under pure torsion considering the correction of the calculation values of twists is proposed to correct the unreasonable assumptions that the concrete is cracked and the concrete tensile stress is ig-nored in RASTMT(rotating angle seftened truss model for torsion).Then,a calculation program for whole process analysis on the pure torsional behavior of the composite box girders is developed based on C++.The analytical results exhibit the good agreement between the calculated values and the ex-perimental values.This analytical model can accurately predict the whole torque-twist curve of the concrete composite box girders with corrugated steel webs under pure torsion.关键词
波形钢腹板混凝土组合箱梁/纯扭转/扭转刚度/变角软化桁架模型/扭矩/扭率曲线Key words
concrete composite box girders with corrugated steel webs/pure torsion/torsional stiff-ness/rotating angle softened truss model/torque-twist curve分类
交通工程引用本文复制引用
沈孔健,万水,蒋正文,Mo Yilung..波形钢腹板混凝土组合箱梁纯扭性能全过程分析[J].东南大学学报（自然科学版）,2017,47(1):112-117,6.基金项目
国家自然科学基金资助项目（50078014）、中央高校基本科研业务费专项资金资助项目、江苏省普通高校研究生科研创新计划资助项目（KYLX＿0159）． （）
