超厚大尺寸联体承台及底板大体积混凝土多因素耦合抗裂风险评估方法研究  

Research on Multi-factor Coupled Cracking Resistance Risk Assessment Method for Ultra-thick and Large-size Joint Bearing Platforms and Bottom Slab Mass Concrete

作　　者：赵娜 鲁志伟 袁正兆 刘咏鑫 王宁宁 ZHAO Na;LU Zhiwei;YUAN Zhengzhao;LIU Yongxin;WANG Ningning(CITIC Construction Co.,Ltd.;North China Construction Group Limited;Changzhou institute of technology)

机构地区：[1]中信建设有限责任公司 [2]华北建设集团有限公司 [3]常州工学院

出　　处：《广东建材》2025年第2期105-109,共5页Guangdong Building Materials

摘　　要：大体积混凝土结构早期开裂是影响结构安全与使用寿命的主要因素之一。本文依托实际工程,针对工程中大尺寸底板与联体承台等大体积混凝土结构的特点,以室内试验的手段探究了混凝土温升、强度指标、体积变形的变化规律,并以此为依据建立混凝土多因素耦合下开裂预测模型。基于开裂预测模型提出风险评判准则,分析依托工程中大体积混凝土结构开裂风险。研究结果可为后续类似工程提供技术参考。Early cracking of mass concrete structure is one of the main factors affecting structural safety and service life.This paper relies on the actual project,for the project of large-size bottom slab and joint bearing platform and other characteristics of mass concrete structure,indoor testing means to explore the concrete temperature rise,strength index,volume deformation of the law of change,and as a basis for the establishment of the concrete multifactorial coupling under the cracking prediction model.Based on the cracking prediction model,risk assessment criteria were proposed to analyze the cracking risk of mass concrete structures in the dependent project.The results of the study can provide technical references for subsequent similar projects.

关 键 词：大体积混凝土 试验研究 开裂 风险评估 

分 类 号：TU7[建筑科学—建筑技术科学]