考虑蠕变的任意多边形杂交应力单元

打开文本图片集

中图分类号：0344.6 文献标志码：A 文章编号：1000-582X（2025）08-028-12

Arbitrary polygonal hybrid stress element for creep analysis in roadbed engineering

LI Zijun'，TIAN Jingjie²，HU Changhao²，TAN Dawen²，XIA Fan²，HOU Chunyao²，LIU Luyao²， NING Shaoqing²，GUO Ran1 （1.Faculty of Civil Engineering and Mechanics，Kunming University ofScience and Technology，Kunming 650500， P. R. China; 2. Xiluodu Hydropower Plant， China Yangtze Power Co.， Ltd.， Zhaotong， Yunnan 657300，P.R.China）

Abstract：Post-construction settlement of roadbeds isa critical factor influencing the long-term safetyand performance of highways. Accurate prediction of creep behavior is of great significance for ensuring the structural integrity of roadbed systems. However，conventional finite element simulations of creep behavior require extensive meshing for complex structural models，leading to high computational costs and time consumption.To addressthese challnges，this paper proposes a novel arbitrary polygonal hybrid stress element method （PHSEM） that incorporates creep effects for roadbed settlement analysis.Based onthe hybrid stress finite element method andthetime-dependent deformation characteristics of roadbed soil，the theoretical formulationof the PHSEM is derived.This element introduces a higher-order stress field，improving computational accuracy.Anumerical creep model is further established and validated against results obtained from MARC software.The simulation results show that the PHSEM achieves good agreement with benchmark solutions， with deviations within acceptable limits.Furthermore，the element accommodates polygons with variable edge counts，offering flexible meshing for complex，heterogeneous roadbed models and enabling realistic stress distribution analysis.The proposed PHSEM provides a promising approach for creep modeling in practical geotechnical engineering applications.

Keywords： hybrid stress element;arbitrary polygonal hybrid stress element;creep; higher-order stressfield; finite element; roadbed

在公路建设过程中，路基沉降会对所建道路的质量产生重要影响。（剩余11238字）