强度折减有限元法分析码头岸坡稳定

Strength reduction finite elements analysis on bank stabilization

岸坡稳定问题一直是工程技术界很关心的研究课题。至今,已出现了较多的岸坡稳定分析方法,如极限平衡法、有限元法等。文中就采用有限元法中的强度折减法对某码头岸坡土体的稳定性进行了分析,土体采用弹塑性D-P屈服准则,并考虑了多层土的存在,最终给出该码头岸坡土体的稳定安全系数、土体应力、塑性区和位移场。其分析获得的土体应力、塑性区和位移场是按传统极限方法进行分析所无法得到的。

Bank stabilty problem is always a focus concerned by the engineers in the field of harbor engineering. There had been a lot of bank stability analysis methods, such as limit equilibrium method and finite element method, etc. Bank stabilty of a certain high-pile wharf is analyzed by strength reduction finite elements method. Based on DruckerPrager criterion, bank stability, safe factor, soil stress as well as plastic zone and displacement field is given. However, the stress, displacement field and plastic zone of the soils can not be obtained by the traditional limit equilibrium method.