考虑厚板效应的轨道交通地下车站楼板开洞加固数值分析

Numerical Analysis of Slab Opening Reinforcement Considering Effect of Thick Plates in Underground Rail Transit Stations

轨道交通地下车站楼板开洞会削弱结构整体刚度,是结构设计中需要重点考虑的环节,需按照混凝土结构构造要求,对开洞部位进行加固。然而,现有的楼板开洞加固措施,是基于薄板的传力机制建立的,对于轨道交通地下车站的厚板体系来说可能不完全适用。参照相关标准,对厚板开洞问题开展了数值分析研究,并根据分析结果提出了针对厚板体系的楼板开洞加固措施的建议。

Openings in the slabs of underground rail transit stations are a critical consideration in structural design which can weaken the overall stiffness of the structure.Such openings need to be reinforced according to concrete structure construction requirements.However,current reinforcement methods for slab openings are based on the load transfer mechanisms of thin plates,which might not be fully applicable to the thick plate systems used in underground rail transit stations.A numerical analysis are conducted following relevant standards for the issue of openings in thick slabs.Recommendations are proposed for reinforcement of slab openings in thick plate systems based on the analysis results.