高寒地区抽水蓄能构造物强震损伤分析  

Earthquake damage analysis of pumped storage structures in alpine region

作　　者：张宇[1] 于士涛 王舒 计静[1] 李振田 王铭明[4] ZHANG Yu;YU Shitao;WANG Shu;JI Jing;LI Zhentian;WANG Mingming(Heilongjiang Key Laboratory of Disaster Prevention,Mitigation and Protection Engineering,Northeast Petroleum University,Daqing,Heilongjiang 163318,China;Daqing Oilfield Engineering Project Management Company Limited,Daqing,Heilongjiang 163411,China;Department of Civil Engineering,Daqing Open University,Daqing,Heilongjiang 163311,China;Faculty of Electric Power Engineering,Kunming University of Science and Technology,Kunming,Yunnan 650500,China)

机构地区：[1]东北石油大学,黑龙江省高校防灾减灾与防护工程重点实验室,黑龙江大庆163318 [2]大庆油田工程项目管理有限公司,黑龙江大庆163411 [3]大庆开放大学土木工程系,黑龙江大庆163311 [4]昆明理工大学电力工程学院,云南昆明650500

出　　处：《东北石油大学学报》2023年第5期101-110,I0007-I0008,共12页Journal of Northeast Petroleum University

基　　金：国家自然科学基金项目(51969010)。

摘　　要：为探究复合盐侵蚀、冻融循环、干湿循环三因素对高寒地区抽水蓄能构造物强震失效模式的影响,开展混凝土劣化试验和结构强震损伤分析。根据工程实际,配制高浓度复合盐溶液,确定试验方案,获得混凝土材料力学性能劣化规律;基于试验结果,利用数值方法分析混凝土劣化对结构塔顶位移、应力和损伤分布规律的影响。结果表明:复合盐侵蚀—冻融循环—干湿循环三因素导致混凝土力学性能显著下降;在强震作用下,构造物损伤区域主要分布在塔体与回填混凝土交界处,混凝土劣化改变结构失效模式和损伤分布规律。该结果有助于掌握高寒地区抽水蓄能构造物的材料性能劣化规律,为工程抗震设计提供参考。In order to explore the effects of composite salt erosion,freeze-thaw cycle and dry-wet cycle on the strong earthquake failure mode of existing pumped storage structures in high cold area,the concrete deterioration tests and structural damage analysis were carried out.According to the actual situation of the project,the high concentration composite salt solution was prepared,the test scheme was determined,and the deterioration law of concrete materials was obtained.Based on the test results,the influence of concrete deterioration on the displacement,stress and damage distribution of tower top is analyzed by numerical method.The results show that the mechanical properties of concrete decrease significantly due to three factors:composite salt erosion,freeze-thaw,dry and wet.Under the action of strong earthquake,the damage area of structures is mainly distributed at the junction of tower and backfill concrete.The deterioration of concrete changes the failure mode and damage distribution law of structures.The research is helpful to master the deterioration law of material properties of pumped storage structures in alpine region and provide reference for seismic design of engineering.

关 键 词：抽水蓄能构造物 盐侵蚀 冻融循环 干湿循环 抗震性能 高寒地区 

分 类 号：TV314[水利工程—水工结构工程]