首页|单侧钢板超高性能混凝土组合板单元面内受力性能试验研究

单侧钢板超高性能混凝土组合板单元面内受力性能试验研究

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为研究单侧钢板超高性能混凝土(half steel ultra-high performance concrete,HSUHPC)组合板单元的面内受力性能,设计了 12个HSUHPC组合板单元试件,采用自主研发的平面双向多功能加载装置完成了 3个单向受拉试验、3个双向受拉试验和6个循环剪切试验,研究含钢率、配筋率对HSUHPC组合板力学性能的影响.结果表明,钢板、钢筋和超高性能混凝土在弹性和开裂初期的变形较为一致,在后续的加载阶段能够保持共同受力;HSUHPC组合板中配置的钢筋与超高性能混凝土之间能够发展有效的应力重分布,由于残余拉伸强度较高且具有良好的应变硬化性能,超高性能混凝土能够提供至少50％的受拉和受剪承载力贡献;配筋率和含钢率对HSUHPC组合板单元承载力均有影响;双向受拉工况对HSUHPC组合板单元的面内承载力影响不大,与单向受拉工况下HSUHPC组合板单元的面内承载力接近.基于试验数据和相关现行规范,提出了 HSUHPC组合板单元的受拉和受剪承载力计算式,公式计算结果与试验结果偏差均在±10％以内,证明其具有较高的计算精度.
Experimental study on in-plane mechanical behavior of half steel ultra-high performance concrete composite panel element
To study the in-plane mechanical behavior of the half steel ultra-high performance concrete composite plate(HSUHPC),twelve HSUHPC panels are designed and tested by a self-developed planar bi-directional multi-functional element tester in this paper.The test program includes three uniaxial tensile tests,three biaxial tensile tests,and six cyclic shear tests.The results show that the steel plates,bars,and UHPC can realize compatibility of deformation at the elastic and initial cracking stages and they can sustain the load together at all loading stages.Effective stress redistribution can be developed between the steel bars and UHPC.Due to the high residual tensile strength and significant strain hardening properties,the UHPC is capable of providing at least 50％of tensile and shear capacity.The reinforcement ratio and steel ratio both have an influence on the bearing capacity of the HSUHPC plate.The biaxial tensile condition has little influence on the bearing capacity of the HSUHPC plate,of which the capacity is close to that of the HSUHPC plate under uniaxial tensile condition.Based on the test data and methods in the codes,formulas for calculating the tensile and shear capacities are proposed for the HSUHPC element.The deviation between the calculation results of the formula and the test results is within 10％,which proves that the high accuracy of the proposed formula.

half steel plate concrete composite structureultra-high performance concrete(UHPC)uniaxial and biaxial tensile testcyclic shear testin-plane mechanical behaviortensile capacityshear capacity

王友刚、丁然、刘入瑞、郭保第、孙运轮、樊健生

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中核能源科技有限公司,北京 100193

清华大学土木工程系,北京 100084

中核山东核能有限公司,山东烟台 265100

单侧钢板组合结构 超高性能混凝土 单双向拉伸试验 循环剪切试验 面内受力性能 受拉承载力 受剪承载力

国家重点研发计划国家自然科学基金项目

2022YFC380200052293433

2024

10.14006/j.jzjgxb.2023.0699

建筑结构学报
中国建筑学会

建筑结构学报

CSTPCD北大核心
影响因子：1.546
ISSN：1000-6869
年,卷(期)：2024.45(8)
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