圆形沉井底梁荷载作用传力的计算方法比较

在圆形沉井下设十字底梁的情况下,底梁的内力分析方法是将底梁作为一个4端简支的十字交叉梁,作用在其上的荷载为底板净反力按照一定的荷载分区分配到底梁及井壁上。对此种情况下,底梁计算时底板净荷载分配到底梁上,通过简化计算方法和按实际传力计算方法的跨中弯矩结果比较,得出误差只有2.6%,简化计算略大。可见采用简化计算的方式是可靠、合适的。

A Calculation Method Comparison of Bottom Beam Load Transmission of Circular Caisson

In the case of setting up cross bottom beam under circular caisson,the inner force analysis method of bottom beam is to make the bottom beam as a four-end simple support cross beam on which the load will be the net reaction on the bottom plate and be distributed to the bottom beam and caisson wall according to certain load partition.Under this condition,when calculating the net reaction on the bottom plate,the mid-span moment values are compared by means of simplified calculation method and practical transmission one,and the error is only 2.6%(the value by simplified calculation method is relatively bigger).Simplified calculation method is reliable and suitable because of its slight error.