塔脚板底板接触应力非线性分布及弯曲应力表达式  

Nonlinear distribution of contact stress and expression of bending stress on bottom plate of tower footplate

作　　者：钱小浩 杨垂玮 刘浩 黄模佳[1] QIAN Xiaohao;YANG Chuiwei;LIU Hao;HUANG Mojia(Institute of Engineering Mechanics,Nanchang University,Nanchang 330031,China;Anhui Electric Power Design Institute Co.,Ltd.,China Energy Construction Group,Hefei 230601,China)

机构地区：[1]南昌大学工程力学研究所,江西南昌330031 [2]中国能源建设集团安徽省电力设计院有限公司,安徽合肥230601

出　　处：《南昌大学学报（工科版）》2022年第1期50-58,共9页Journal of Nanchang University(Engineering & Technology)

摘　　要：基于我国输电铁塔基础结构中四地脚螺栓塔脚板的相关设计规范,以及对四地脚螺栓塔脚板的有限元数值模拟,分析四地脚螺栓塔脚板与混凝土基础考虑非线性接触时,不同厚宽比下的应力场变化。利用非线性接触理论推导,得出塔脚板底板最大弯矩表达式;再结合有限元仿真结果,得出不同厚宽比下的应力计算表达式以及底板最小厚度表达式。根据相关设计规范设计其他规格实体塔脚板模型,开展有限元仿真塔脚板仿真校核。校核结果表明:所设计的塔脚板应力场分布情况与理论计算结果吻合较好,验证了四地脚螺栓塔脚板与基础接触的应力表达式具有适用性,能够通用于不同尺寸规格的塔脚板。Based on the relevant design specifications of the four-pin bolted tower footplates in the foundation structure of transmission towers in China and the finite element numerical simulation of the four-pin bolted tower footplates,the stress field changes of the four-pin tower footplates under different thickness and width ratios considering the nonlinear contact with the concrete foundation were analyzed.The expression of the maximum bending moment of tower footplate bottom plate was derived by using the nonlinear contact theory.Combined with the results of finite element simulation,the expression of stress under different thickness to width ratio and the expression of minimum thickness of bottom plate were obtained.According to relevant design specifications,design other specifications of solid tower footplate models,and carry out finite element simulation tower footplate simulation check.The checking results showed that the designed stress field distribution of the tower footplate was in good agreement with the theoretical calculation results,which verified that the stress expression of the contact between the four anchor bolt tower footplate and the foundation has applicability and can be used in all sizes of the tower footplate.

关 键 词：塔脚板 非线性接触 受压应力场 有限元仿真 

分 类 号：TB125[理学—工程力学]