预应力混凝土风机塔架结构安全性影响因素研究
Research on Safety Influence of Prestressed Concrete Wind Turbine Tower Structure
张俊俊 1甄理 1黄昊 1孙林远 1刘志鹏 2陈改新1
作者信息
- 1. 中国水利水电科学研究院 流域水循环模拟与调控国家重点验室,北京 100038;中国水利水电科学研究院 水利部水工程材料重点实验室,北京 100038
- 2. 水利部产品质量标准研究所,浙江 杭州 310024
- 折叠
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.
Abstract
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.
关键词
混凝土塔架/预应力损失/混凝土劣化/表观缺陷/塑性损伤Key words
concrete tower/prestress loss/concrete deterioration/visual defects/plastic damage引用本文复制引用
基金项目
中国水科院基本科研业务费项目(SM0145B042021)
中国水科院基本科研业务费项目(SM0145B252019)
出版年
2024
NETL
NSTL
万方数据