考虑侧向挤出效应的软弱夹层极限荷载研究

软弱夹层构造在沿海地区工程建设中经常遇到,因其力学性能较低,易给工程的后续稳定性带来危害。目前针对软弱夹层的承载稳定性分析方法还较少,部分被相关行业所采用的计算理论也存在一些有待完善的地方。针对软弱夹层的破坏模式进行研究,采用极限分析上限法对软弱夹层的极限压力进行求解,提出的计算模式考虑了软弱夹层的宽厚比、层面摩擦条件、侧向偏移及附加力等因素的影响,结果可为合理分析软弱夹层的承载稳定性提供理论依据。

Research on the Ultimate Load of Soft Interlayer Considering the Effect of Lateral Extrusion

Soft interlayer structure is widely encountered during construction of engineering in coastal areas. For its weak properties, it usually brings hazards to the subsequent stability of projects. At present, the analysis method of bearing capacity of soft interlayer are still few, and there are also some deficiency of calculation theory need to be improved which have been adopted by the relevant industry. The failure mode of soft interlayer is researched in this text, the ultimate pressure of soft interlayer is solved by the upper bound method in the limit analysis as well. The influence of the thickness ratio, the friction condition, the lateral offset and the additional force to the soft interlayer are considered in the calculation method. The outcome can provide a theoretical basis for the reasonable analysis of the bearing stability of the soft interlayer.