影响矩阵在大跨度桥梁荷载试验加载计算中的运用

为解决大跨度桥梁荷载试验(静载)方案设计计算时,常规加载计算方法普遍存在的工作量大、效率低的问题,文中通过在桥梁计算模型中满布加载车,计算得到每一组加载车作用下桥梁关键截面(节点)的效应值,然后组成影响矩阵K,再引入加载向量R,并与Excel结合使用,提出新的荷载试验(静载)加载计算方法。通过实例计算验证,该方法能够大幅度提高工作效率,节约时间,且简单易懂灵活,计算结果与常规方法相比偏差小于2%。

Application of Influence Matrix in Load Test and Calculation of Long Span Bridge

In order to solve the problem of huge workload and low efficiency inlarge-span bridge load test(static load)scheme design and calculation by the conventional loading calculation method,a new load test(static load)loading calculation method is proposed.In the new method,the effect value of key section(node)of bridge under the action of each group of loading vehicles is calculated by filling the bridge calculation model with loading vehicles,and then the influence matrix K is formed,and then the loading vector R is introduced,and the whole process is combined with Excel.Through the example calculation,the method can greatly improve the work efficiency,save time,and is easy to understand and flexible.Compared with the conventional method,the deviation of the calculation result is less than 2%.