摘要
以江山北关自锚式悬索桥为例,利用有限元软件建立了自锚式悬索桥空间分析模型,分别考虑了恒载静力作用、主缆吊杆初始张拉力及几何非线性对其静力特性的影响。通过分析计算,给出了这些因素对该桥静力特性的影响规律。然后,通过典型的实桥静载试验研究来验证理论分析。从加劲梁、主缆挠度与索塔水平偏位,加劲梁与索塔应变,吊杆索力等几方面的对比,表明理论计算值和实测值吻合较好,北关大桥的刚度和强度满足规范要求。
Taking a self-anchored suspension bridge,Beiguan Bridge in Jiangshan,as an example,the self-anchored suspension bridge model is established using the finite element software.The behaviour of Beiguan Bridge is analyzed by considering the impact of these factors including dead load action,initial forces of the main cable and its non-linear geometry on the bridge＇s static characteristics.The filed static load test is completed to verify the theoretical analysis.The results show that there is a good agreement between analysis values and test values from severalaspects such as stiffening girder,main cable deflection,cable bent tower horizontal displacement,cable bent tower strain and suspender stress.Well,the stiffness and strength of Beiguan Bridge meet the requirements specified by the design code.
出处
《中国市政工程》
2010年第1期18-20,共3页
China Municipal Engineering
关键词
自锚式悬索桥
初始平衡状态
初始张拉力
有限元法
静载试验
self-anchored suspension bridge
the initial state of equilibrium
the initial tensile force
limited element method
static load test
