[Oral Presentation]混凝土界面过渡区细观尺度力学性能测试表征

Organized By

Hohai University

Monash University

Co-organized by

Southeast University

Jiangxi University of Science and Technology

Northeast University

DUT-BSU Scientific Research and Innovation Center

Suzhou University of Science and Technology

State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment

Sponsoring agency

KELI SDEM Software (Dalian) Co., Ltd.

Sugon Smart Computing Information Technology Co., Ltd.

Beijing Paratera Technology Co., Ltd.

Simpop Information Technology Co., Ltd.

Important Dates

Conference Announcement

December 2023, release First Round Announcement
Abstract Submission Deadline
March 31^th, 2024
Paper Submission Deadline
April 30^th, 2024
Registration
From January 1^st, 2024
Conference Schedule
May 31^st (Friday), 2024 On-Site Registration
June 1^st to 3^rd, 2024 Conference

混凝土界面过渡区细观尺度力学性能测试表征

ID：250 Submission ID：277 View Protection：ATTENDEE Updated Time：2024-04-30 10:38:37 Hits：559 Oral Presentation

Start Time：Pending （Asia/Shanghai）

Duration：Pending

Session：[No Session] » [No Session Block]

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Abstract

混凝土界面过渡区（Interfacial Transition Zone，ITZ）是混凝土材料中的薄弱环节，由于其尺寸仅为微米级别，对其进行力学性能测试存在诸多困难。为了在细观尺度上测试表征ITZ的力学性能，本研究提出扫描电子显微镜（Scanning Electron Microscope，SEM）和数字图像相关技术（Digital Image Correlation，DIC）相组合的实验方法，设计半骨料半砂浆试件形式，测量ITZ的应力-应变关系，进一步计算得到强度、断裂能和弹性模量等力学性能，并根据条带提取法实现细观尺度的ITZ非均质力学性能表征。此外，通过小波包分析进一步开展ITZ的微损伤识别，并探讨骨料种类、水灰比对ITZ力学性能的影响。研究表明：细观尺度上弹性模量明显较低和孔隙率明显较大的区域可以表征为ITZ；微损伤程度可以通过小波包分析计算得到的能量变化率进行有效表征；具有石灰岩骨料和高水灰比的混凝土中ITZ的力学性能更为薄弱。

Keywords

混凝土,界面过渡区,细观尺度,力学性能,测试表征

Speaker

何锦涛

河海大学

Submission Author

何锦涛河海大学

雷冬河海大学

赵海涛河海大学

Sponsored By

Hohai University

Panel of Computational Mechanics on Granular Materials, Working Party of Computational Mechanics, Chinese Society of Theoretical and Applied Mechanics

Jiangsu Society of Theoretical and Applied Mechanics