大企口缝单孔空心板桥截面等效方法研究

Research on cross section equivalence method of big tongue and groove joint single hollow slab

采用不扣除企口缝部分的近似计算方法和扣除企口缝的精确计算方法对大企口缝单孔空心板截面等效方法进行研究,得出近似等效计算方法的误差远远大于5%,不能满足工程需要,故在等效计算中,企口缝不能忽略,需使用面积等效、惯性矩等效、形心轴位置不变等3个原则方可求得其精确解。研究结论可为工程设计人员处理同类问题提供参考。

Cross section equivalence calculation method of big tongue-and-groove joint single hollow slab is researched by adopting no deduct tongue-and-groove joint approximate calculation method and deduct tongue-and-groove joint accurate calculation method.The results show that the approximate equivalent calculation error is far greater than 5%.It cannot meet the engineering needs.So tongue-and-groove seam cannot oversight in cross section equivalent calculation.The cross section equivalent calculation can obtain the accurate solution based on area equivalent and inertia equivalent and centroid position of the same axis.This conclusion can provide the reference for engineers with similar issues.