大跨度斜拉桥横向钢阻尼器力学性能研究OA
Study on Mechanical Performance of Transverse Steel Dampers for Long-Span Cable-Stayed Bridges
以汕头牛田洋公铁两用大桥为工程背景,对横向钢阻尼器的力学性能进行深入研究.结合横向钢阻尼器的结构力学计算与本构关系分析两种分析方法,得出其屈服力、竖向抗拔力、屈服位移、阻尼位移、初始刚度、屈后刚度等设计参数的理论公式,建立横向钢阻尼器ABAQUS有限元模型,通过数值仿真获得双弧形钢的等效塑性应变与各个设计参数的模拟值,对比分析各个设计参数的模拟值与理论值;对横向钢阻尼器进行不同载荷步的循环加载试验及疲劳试验,获取滞回曲线并对比分析了屈服力、屈服位移及初始刚度等设计参数的检测值与理论值、模拟值之间的关系.结果表明:当钢材等效塑性应变处于极限值附近时,横向钢阻尼器设计参数的模拟值、检测值与其理论值之间的偏差最大值分别为 8%、9%,均满足设计规范允许偏差±15%的要求,验证了该理论公式较合理可行,可直接适用于横向钢阻尼器的开发设计,从而加快产品开发进度;将双弧形钢的极限等效塑性应变与其阻尼位移相对应,充分发挥双弧形钢的阻尼耗能作用,且各个设计参数的最大偏差控制在±15%以内,可实现弹塑性钢材的充分利用,从而降低产品材料成本.
Taking the Niutianyang Rail-cum-Road Bridge in Shantou as the engineering background,this study conducts an in-depth investigation into the mechanical performance of transverse steel dampers.By combining structural mechanics calculations and constitutive relation analysis of the transverse steel damper,theoretical formulas for design parameters such as yield force,vertical uplift force,yield displacement,damping displacement,initial stiffness,and post-yield stiffness were derived.An ABAQUS finite element model of the transverse steel damper was then established,and through numerical simulation,the equivalent plastic strain(PEEQ)of the double-arc steel and the simulated values of each design parameter were obtained and compared with their theoretical values.Cyclic loading tests with different load steps and fatigue tests were carried out on the transverse steel damper,and its hysteresis curves were obtained.The relationships between the measured values and the theoretical and simulated values of design parameters such as yield force,yield displacement,and initial stiffness were comparatively analyzed.The results showed that,when the equivalent plastic strain of the steel was near its limit value,the maximum deviations between the simulated and measured values of the design parameters of the transverse steel damper and their theoretical values were 8%and 9%,respectively,all of which satisfied the allowable deviation of±15%specified in the design specification,thereby verifying that the theoretical formulas were reasonable and feasible and could be directly applied to the development and design of transverse steel dampers to accelerate product development.By relating the limit equivalent plastic strain(PEEQ)of the double-arc steel to its damping displacement,the damping and energy-dissipation effect of the double-arc steel could be fully utilized,while the maximum deviation of each design parameter was controlled within±15%,so that the elastoplastic steel was fully utilized and the material cost of the product is reduced.
王伟强;田杨;刘方成;李培璐;冷新云;夏俊勇
株洲时代新材料科技股份有限公司,湖南 株洲 412007株洲时代新材料科技股份有限公司,湖南 株洲 412007湖南工业大学土木工程学院,湖南 株洲 412007株洲时代新材料科技股份有限公司,湖南 株洲 412007株洲时代新材料科技股份有限公司,湖南 株洲 412007株洲时代新材料科技股份有限公司,湖南 株洲 412007
交通工程
大跨度斜拉桥横向钢阻尼器力学性能数值仿真试验双弧形钢
long-span cable-stayed bridgetransverse steel dampermechanical performancenumerical simulationtestdouble-arc steel
《铁道标准设计》 2026 (2)
106-113,8
湖南省科技创新计划项目(2017XK2203)
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