静载下碱式硫酸镁水泥混凝土梁抗弯性能退化的数值模拟研究  

Numerical simulation of the degradation in bending behavior of basic magnesium sulfate concrete beam under static loading

作　　者：曾翔超 余红发[3] 麻海燕[3] ZENG Xiangchao;YU Hongfa;MA Haiyan(Department of Civil Engineering,Xinyu College,Xinyu 338004,China;School of Architecture and Civil Engineering,Yangtze Normal University,Chongqing 408100,China;Department of Civil Engineering,Nanjing University of Aeronautic and Astronautic,Nanjing 210016,China)

机构地区：[1]新余学院建筑工程学院,江西新余338004 [2]长江师范学院土木学院,重庆408100 [3]南京航空航天大学土木工程系,江苏南京210016

出　　处：《哈尔滨工程大学学报》2025年第2期205-209,共5页Journal of Harbin Engineering University

基　　金：国家自然科学基金项目(51678304);重庆市自然科学基金项目(CSTB2022NSCQ-MSX3696);重庆市教委重点项目(KJZD-K202201406)。

摘　　要：碱式硫酸镁水泥混凝土有具有快凝、高强、抗水和抗腐蚀等优点,但对其抗弯构件只进行了初步试验研究。为了进一步探索高强碱式硫酸镁混凝土梁的力学性能,本文进行了C50碱式硫酸镁水泥混凝土梁静载下抗弯性能退化的数值模拟,研究其极限承载力、变形等。结果表明,如考虑梁受拉区的碱式硫酸镁水泥混凝土开裂后的部分抗拉能力,碱式硫酸镁水泥混凝土梁的正截面受力过程可以被Ansys有限元较精确的数值模拟;梁的配筋率越大,极限承载力也越大,随着配筋率增长,抗弯承载力趋于相同;经参数敏感性分析发现,梁截面高度的增长对梁弯矩的增长贡献更大。本文对碱式硫酸镁水泥混凝土在建筑工程中的应用有重要意义。Basic magnesium sulfate cement(BMS)offers several advantages,such as fast setting,high tensile strength,and resistance to water and corrosion.However,the performance of high-strength BMS beams has yet to be fully explored.A numerical simulation was conducted to study the degradation of the bending performance of BMS concrete beams with a compressive strength of 50 MPa under static loading.The study focused on analyzing the beam′s bearing capacity,deformation,and other mechanical properties.The results demonstrate that the failure process of BMS concrete beams can be simulated accurately using Ansys,provided that the partial tensile capacity of the cracked BMS concrete in the tensile zone of the beam is considered.A higher reinforcement ratio of BMS concrete beams leads to greater ultimate bearing capacity.However,as the reinforcement ratio increases,the flexural bearing capacity of the beams approaches a consistent value.Parameter sensitivity analysis reveals that increasing the section height of the BMS concrete beam contributes more to the increase in bending moment than other factors.This study holds considerable significance for the application of BMS concrete in construction projects.

关 键 词：碱式硫酸镁水泥混凝土 Ansys 数值模拟 抗弯性能 承载力 配筋率 静载 挠度 

分 类 号：TU378.2[建筑科学—结构工程]