[Oral Presentation]基于卵球形集料堆积体系的混凝土边壁效应研究

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

基于卵球形集料堆积体系的混凝土边壁效应研究

ID：301 Submission ID：383 View Protection：ATTENDEE Updated Time：2024-05-18 15:21:06 Hits：653 Oral Presentation

Start Time：Pending （Asia/Shanghai）

Duration：Pending

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

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Abstract

边壁效应使模板附近集料与基体内部分布不同，造成混凝土微观结构和宏观性能的差异。为探究混凝土边壁效应对集料分布的影响，本文通过数值模拟方法，在边壁效应的条件下结合蒙特卡洛原理，构造了单形状-双尺寸、单形状-多尺寸卵球形集料的混凝土数值模型，以研究集料形状、尺寸和体积分数变化对模型边壁效应层厚度的影响。利用体视学理论和截面分析算法确定了边壁效应层厚度与粒子体积分数和粒子的平均直径的量化关系，建立了粒子分布密度的解析式并验证了其可靠性。最后，应用边壁效应层厚度和粒子分布密度模型计算了混凝土不同位置处的弹性模量。统计分析可知，边壁效应层厚度随粒子的体积分数增加而减小，随着粒子的平均直径增大而增大，相比之下受粒子形状的影响较小。

Keywords

卵球形集料；边壁效应；集料体积分数；集料平均直径；弹性模量

Speaker

李万飞

河北工业大学

Submission Author

李明祺河北工业大学

李万飞河北工业大学

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