PC连续槽形梁的力学性能研究  

ANALYSIS OF MECHANICAL PERFORMANCES OF CONTINUOUS U SHAPED BEAM

作　　者：汪锋 张剑[3] 江雷[3] WANG Feng;ZHANG Jian;JIANG Lei(Tongji Univ. , Shanghai 200092, China;Jiangsu Yangtze River Bridge Co. , Ltd. , Nanjing 214521 ,China;Nanjing Univ. of Aeronautics and Astronautics, Nanjing 210016 ,China)

机构地区：[1]同济大学,上海200092 [2]江苏扬子大桥股份有限公司,南京214521 [3]南京航空航天大学,南京210016

出　　处：《低温建筑技术》2017年第12期27-29,86,共4页Low Temperature Architecture Technology

基　　金：国家自然科学基金(11232007);江苏省自然科学基金(BK20130787)

摘　　要：根据实体退化单元,建立PC连续槽形梁的分析模型,对其力学响应进行了研究。基于实体退化单元模式,推导了实体退化单元的位移场表达式,并得到了相应的内力表达式,同时基于四参数屈服准则、Hinton压碎准则等考虑了混凝土的材料非线性。通过PC连续槽形梁实例分析,结果表明,实体退化单元能有效地模拟PC连续槽形梁,随着加载量增大,预应力钢筋应力增长迅速但未屈服。研究结论可供工程设计参考。Based on degraded solid element method, crete U beam was studied. The analytic model of degraded the mechanical behavior of pre-stressed consolid element was set up and the expressions of coordinates and displacement fields are derived. Then the internal force expressions of normal force, bending moment, torque and shear force are obtained. At the same time, the material nonlinearity of concrete is considered based on the four parameter yield criterion. Through the example analysis of prestressed concrete U shaped beam, it is shown that the pre-stressed concrete U shaped beam can be efficiently modeled by the degraded solid stressed steel bar be referred to the increases rapidly but engineering design. element. With the increase it is less than the yield of the of the load, the stress of the presteel. The research conclusions can

关 键 词：连续槽形梁 PC 实体退化单元 非线性 

分 类 号：U443.3[建筑科学—桥梁与隧道工程]