骨料联锁数值模型仿真与矮墩抗剪承载能力评估OA
Simulation of aggregate interlocking numerical model and evaluation of shear bearing capacity of low pier
为解决现有骨料联锁计算模型夸大箍筋抗剪贡献、忽略骨料咬合力抗剪作用的问题,引入界面过渡区(ITZ)二次开发技术建立数值模型,结合试验数据验证其合理性和准确性,开展数值分析探明骨料联锁机理.针对骨料联锁理论中砂浆与骨料的接触面积与实际存在误差以及骨料破裂未被考虑的问题进行修正,应用于矮墩抗剪强度预测.研究结果表明:修正后计算模型更能体现骨料联锁机制的特征,使矮墩抗剪承载力计算中试验值与预测值比值从 1.13 优化至 1.08,有效校正了原有模型低估矮墩抗剪承载力的缺陷.
In order to solve the problem that the existing aggregate interlocking calculation model exag-gerates the shear contribution of stirrups and ignores the shear effect of aggregate bite force,this paper introduces the secondary development technology of interface transition zone(ITZ)to establish a numerical model,verifies its rationality and accuracy with experimental data,and carries out numerical analysis to explore the aggregate interlocking mechanism.Aiming at the problem that the contact area between mortar and aggregate in the aggregate interlocking theory has errors with the actual situation and the aggregate rupture has not been considered,it is modified and applied to the shear strength prediction of low piers.The results show that the modified calculation model can better reflect the characteristics of aggregate interlocking mechanism,and the ratio of test value to predicted value in the calculation of shear capacity of low pier is optimized from 1.13 to 1.08,which effectively corrects the defect that the original model underestimates the shear capacity of low pier.
林志鹏;刘中和;叶凌松;许莉;周默含
泉州市路桥发展集团有限公司,福建 泉州 362011泉州市路桥发展集团有限公司,福建 泉州 362011泉州市公路事业发展中心南安分中心,福建 泉州 362011福州大学土木工程学院,福建 福州 350108福州大学土木工程学院,福建 福州 350108
建筑与水利
骨料联锁机制数值分析抗剪承载力矮墩
interlocking mechanism of aggregatenumerical analysisshear bearing capacitylow pier
《福州大学学报（自然科学版）》 2026 (2)
195-203,9
福建省科技厅引导性基金资助项目(2024H0007)国家自然科学基金资助项目(52478500)
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