摘要
针对风机基础加固后是否能有效降低承台应力水平,在极端荷载工况下是否出现损伤破坏等问题,以华东某49.8 MW风电场项目为例,利用ABAQUS及混凝土损伤塑性理论建立了风机基础加固前后数值模型,并对钢筋及混凝土的应力与损伤进行了计算分析。结果表明,加固前台柱部分基础环外侧混凝土的损伤较为严重,承受拉、压应力的能力较低;加固后混凝土承台最大拉、压应力显著降低,加固体与基础环上部接触的部位几乎没有产生损伤。通过加植竖向、径向等钢筋和加大台柱截面等措施可以在一定程度上增强承台整体结构承载能力,嵌固板环梁式加固法可使基础满足更高风力标准,增大整体基础支撑系统重力,提高其稳定安全性。该成果不仅对预估风机基础结构的安全性评价具有重要意义,而且对同类工程设计和施工具有一定的参考价值。
Aiming at whether the foundation of the wind turbine can effectively reduce the stress level of the bearing platform and whether damage and damage occur under extreme load conditions, taking a 49.8 MW wind farm project in East China as an example, the numerical model before and after the reinforcement of the fan foundation is established using ABAQUS and concrete damage plasticity theory, and the stress and damage of the steel bar and concrete are calculated and analyzed;the results show that the damage to the concrete outside the foundation ring of the front column part is more serious, and the ability to withstand tensile and compressive stress is lower;the tensile and compressive stresses are significantly reduced, and there is almost no damage to the part where the solid body contacts the upper part of the foundation ring. By adding vertical and radial reinforcing bars and increasing the cross section of the pillar, the overall bearing capacity of the overall structure of the platform can be enhanced to a certain extent. The embedded plate ring beam type reinforcement method can make the foundation meet higher wind standards, increase the gravity of the overall foundation support system, and improve its stability and safety.This achievement is not only of great significance to the safety assessment of the estimated fan infrastructure, but also has a certain reference value for the design and construction of similar projects.
作者
胡良明
刘志鹏
曾宇
黄昊
HU Liangming;LIU Zhipeng;ZENG Yu;HUANG Hao(School of Water Conservancy Engineering,Zhengzhou University,Zhengzhou 450001,Henan,China;Wenruiping Water System Management Center of Wenzhou Water Conservancy Bureau,Wenzhou 325000,Zhejiang,China;China Institute of Water Resources and Hydropower Research,Beijing 100038,China)
出处
《水利水电技术（中英文）》
北大核心
2021年第5期223-233,共11页
Water Resources and Hydropower Engineering
基金
国家自然科学基金青年科学基金项目(51609217)。
