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采用MIDAS/CIVIL有限元软件对一跨径124m的钢箱斜靠式拱桥进行分析,计算了其在三种荷载标准组合下的力学性能,结果表明:竖直拱肋和斜靠拱肋的最大压应力都小于钢材弯曲应力容许值。竖直吊杆安全系数3.19,倾斜吊杆安全系数3.53,满足拱桥设计要求吊杆最小安全系数不得小于2.5的规定,并且应力都小于吊杆应力上限,满足吊杆疲劳性能要求。系杆安全系数2.94,满足系杆最小安全系数不得小于1.8的要求。中横梁应力和端横梁抗弯抗裂性能满足设计要求。挠度验算其结构刚度满足规范要求。拱肋屈曲稳定分析其稳定系数远大于一般的要求。该桥设计安全可靠。
The finite element analysis software MIDAS / CIVIL was used to analyze a steel box reclining arch with a span of 124m. The mechanical properties of the reclining arch bridge under three load combinations were calculated. The results show that the maximal Compressive stress is less than steel bending stress allowable value. The safety factor of vertical boom is 3.19 and the safety factor of inclined boom is 3.53. The minimum safety factor of boom required to meet the requirements of arch bridge design is not to be less than 2.5, and the stress is less than the upper limit of boom stress to meet the requirement of boom fatigue performance. Tie rod safety factor of 2.94, to meet the minimum safety coefficient of tie rod shall not be less than 1.8 requirements. Beam stress and end beam bending and cracking performance to meet the design requirements. Deflection calculation of structural rigidity to meet the regulatory requirements. Buckling stability analysis of the stability factor is much larger than the general requirements. The bridge design is safe and reliable.