摘要
混凝土挡块震害是桥梁震害的主要形式之一,型钢挡块具有塑性耗能和方便修复的特点。为便于工程设计计算,针对新型H型钢弹塑性挡块的力学性能,从H型钢截面的截面应力入手,利用应力弯矩关系,采用弯矩曲率分析方法,建立了H型钢弹塑性挡块弯矩-曲率和力-位移的计算公式,进而建立了H型钢挡块屈服前刚度、屈服荷载、屈服位移和屈服后刚度等关键力学参数的计算公式,并推导了H型钢挡块简化双线性滞回曲线。同时将上述建立的参数理论公式计算结果与有限元纤维模型法分析结果进行了对比,验证了所提出的计算方法的可靠性。
The damage of concrete stoppers is one of the main forms of seismic damage of bridges.The steel stoppers superior for its characteristics of plasticenergy and repair.To facilitate engineering design calculations,this established moment-curvature and force-displacement calculating formulas by using the mechanical properties of the new H-beam elastic-plastic stopper,the stress of H-beam section,the relations and moment curvature analysis method.calculating formulas parameters of the H-beam stopper before yielding,yield,yield displacement and-yield stiffness.simplif bilinear hystere curve of H-beam bending elastic-plastic stoppers.heoretical formulas and finite element analysis fiber modelwere comparedhe reliability of the calculation method.
作者
朱超
樊冰冰
ZHU Chao;FAN Bingbing(China Railway Major Bridge Reconnaissance&Design Institute Co.,Ltd.East China Branch,Nanjing 210009,China;China First Highway Survey and Design Institute Co.,Ltd.,Xi’an 210009,China)
出处
《世界地震工程》
CSCD
北大核心
2019年第3期186-197,共12页
World Earthquake Engineering
关键词
梁式桥
H型钢挡块
抗震设计
刚度
beam bridge
h-beam stopper
seismic design
stiffness
