摘要
预应力混凝土塔架较钢制塔架具有更高的抗疲劳特性及稳定性,能够满足复杂地形的建设需求。基于现场监测数据,利用混凝土塑性损伤模型对塔架结构进行全尺寸建模,通过对比监测数据与数值仿真结果,研究了预应力损失、混凝土劣化及表观缺陷等因素对塔架结构力学性能的影响规律。结果表明,预应力混凝土塔架结构安全受多种因素影响,随着结构的劣化塔架刚度逐渐软化,低阶振型对结构共振的影响较大,塔架结构损伤形式趋向于受拉破坏。
Compared to steel towers,prestressed concrete towers exhibit higher fatigue stability and can meet the construction requirements of complex terrains.Based on on-site monitoring data,a full-scale modeling of the tower struc-ture was performed using a concrete plastic damage model.By comparing the monitoring data with numerical simulation results,the influence of factors such as prestress loss,concrete deterioration,and apparent defects on the mechanical per-formance of the tower structure was investigated.The results indicate that the safety of prestressed concrete towers is in-fluenced by multiple factors.As the structure deteriorates,the stiffness of the tower gradually softens,and low-order modes have a significant impact on structural resonance.The damage mode of the tower structure tends to be tensile failure.
作者
张俊俊
甄理
黄昊
孙林远
刘志鹏
陈改新
ZHANG Jun-jun;ZHEN Li;HUANG Hao;SUN Lin-yuan;LIU Zhi-peng;CHEN Gai-xin(State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin,China Institute of Water Resources and Hydropower Research,Beijing 100038,China;Key Laboratory of Engineering Materials of Ministry of Water Resources,China Institute of Water Resources and Hydropower Research,Beijing 100038,China;Standard&Quality Control Research Institute,Hangzhou 310024,China)
出处
《水电能源科学》
北大核心
2024年第5期202-206,130,共6页
Water Resources and Power
基金
中国水科院基本科研业务费项目(SM0145B042021,SM0145B252019)。
