3种手算框架结构侧移方法比较

在简要介绍3种手算方法的基础上,以两跨12层现浇楼板中框架为例,分别通过3种不同的手算方法计算结构侧移,并与SAP2000计算的结果进行对比,从计算公式分析中找出它们之间的异同,并对3种手算方法进行综合评述。计算结果表明:反弯点法计算结构的侧移误差很大,不应采用;D值法与S-C法计算结果较为接近精确值,考虑到后者能以较小的计算量获得更高的计算精度,实际工程中推荐采用S-C法来计算框架结构的侧移。

Comparion of three hand-calculation methods of frame lateral displacements

Based on the brief introduction of the three handcalculation methods,a twelve-storey two-span frame was taken for example,and the structural lateral displacements were calculated by the three different ways,which were in contrast with the results of SAP2000.The similarities and differences were found from their calculation formula,and the integrative annotation of the three hand-calculation methods was given.It is shown that the lateral displacement error of the inflection point method is too large to use,and the results of D value method and the S-C method are close to exact result.The S-C method is commended to calculate the lateral displacements of frames because it is easier and the results are more exact.