弹性地基梁设计理论与方法

Design Theory and Methods of Elastic Foundation Beam

介绍了基于Ｗｉｎｋｌｅｒ地基模型的差分法与美国混凝土学会推荐计算法、基于弹性半空间地基模型的差分法与链杆法求解地基梁内力的计算方法。对某地基梁实例在不同地基条件下的内力进行了对比分析，建议用弹性半空间地基的差分法和易于手算的美国混凝土学会推荐计算法计算地基梁内力。为安全计，可对后者的计算弯矩作一定修正（增加），作为设计弯矩。

The paper introduces the computing approach of internal force for beam on elastic foundation using both finite difference (FD) method and American Concrete Institute (ACI) method based on the Winklers foundation model,and using both FD method and link method based on elastic half space foundation model.An example foundation beam is analyzed for cases of varied foundation conditions by above named four methods and routine adjustment inversted beam method.The paper suggestes the moment computed by both FD method hased on elastic half space foundation model and ACI method being easy of hand computation is adopted as the design moment of foundation beam,but it is essential to increase appropriately the value of computing moment by ACI method for safety.