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应用ABAQUS分析软件对交通荷载作用下基坑支护结构体系的动力响应进行了计算分析。通过将车辆荷载简化为半波正弦荷载,并通过调整半波正弦荷载作用位置以及荷载的角频率,较系统地分析了交通荷载作用下基坑桩锚支护体系内力及位移变化的规律。当荷载作用位置距离支护结构越近时,支护桩的水平位移值就越大,且锚杆的轴力值也越大;当荷载频率增加时,支护桩的水平位移值增大,而锚杆的轴力却减小。结合一个具体的工程实例,通过对其监测数据进行了分析,并与数值计算结果进行了比较。分析结果表明,支护桩的水平位移与锚杆的轴力的变化规律与数值模拟结果符合较好。
The dynamic response of the foundation pit supporting structure system under traffic load was calculated and analyzed by using ABAQUS software. The vehicle load is simplified to a half-wave sinusoidal load, and by adjusting the position of the half-wave sinusoidal load and the angular frequency of the load, the law of the internal force and displacement of the pile-anchor supporting system under the traffic load is systematically analyzed. When the load acting position is closer to the support structure, the horizontal displacement value of the supporting pile is larger and the axial force value of the anchor rod is also larger. When the load frequency increases, the horizontal displacement value of the supporting pile increases, The axial force of the bolt is reduced. Combined with a specific engineering example, the monitoring data are analyzed and compared with the numerical results. The analysis results show that the regularity of the horizontal displacement of supporting pile and the axial force of rock bolt is in good agreement with the numerical simulation results.