基于PIV技术的高强材料梁柱节点抗震性能研究  

Study on seismic performance of beam-column joints with high strength materials based on PIV technology

作　　者：赵丽霞 史晓磊 杨卓强[3] Zhao Li-xia;Shi Xiao-lei;Yang Zhuo-qiang(College of Engineering Management,Shanxi Vocational University of Engineering Science and Technology,Jinzhong 030031,China;Xi'an Rare Metal Materials Research Institute Co.Ltd,Xi'an 710016,China;Taiyuan University of Science and Technology,Taiyuan 030024,China)

机构地区：[1]山西工程科技职业大学工程管理学院,山西晋中030031 [2]西安稀有金属材料研究院有限公司,陕西西安710016 [3]太原科技大学,山西太原030024

出　　处：《工程抗震与加固改造》2025年第2期19-27,共9页Earthquake Resistant Engineering and Retrofitting

基　　金：山西省住房和城乡建设厅项目(JSKJCG2022017)。

摘　　要：为了研究节点区配箍不足的高强筋(600MPa级)高性能混凝土梁柱边节点的抗震性能。对6个1/2缩尺梁柱边节点进行了低周反复荷载试验。试验节点的区别在于受弯钢筋的屈服强度、直径和混凝土强度。在试验中采用了粒子图像测速(PIV)技术对梁柱节点的剪切变形、梁弯曲变形、塑性铰长度、表面应变场和裂缝开展进行精确测量。试验结果表明,采用PIV能够较准确地观测梁裂缝的开展情况,配置高强筋的节点与采用400MPa级钢筋的节点相比,配置400MPa级钢筋梁内出现应力集中的现象。此外,节点剪切变形和梁裂缝宽度也较大,而塑性铰长度得到减小。高强混凝土和高强钢筋的组合使用提高了结构的耗能能力和初始刚度。In order to study the seismic performance of beam-column exterior joints with high-strength steel bars(600MPa)and high-performance concrete but insufficient stirrups,Six 1/2-scale beam-column exterior joints were tested under low reversed cyclic loading.The difference between the test joints lies in the yield strength,diameter of the flexural steel bar and concrete strength.The particle image velocimetry(PIV)technique was used to accurately measure the joint shear deformation,beam bending deformation,plastic hinge length,surface strain field and crack morphology of the beam-column joint test.The experimental results show that PIV can accurately observe the development of beam cracks.The energy dissipation capacity of the joints with high strength bars is 16%lower than that of the joints with 400MPa grade steel bars.The experimental results show that PIV can accurately observe the development of beam cracks.Compared with the joint with 400MPa grade steel bar,the stress concentration phenomenon occurs in the beam with 400MPa grade steel bar.In addition,the shear deformation of the joint and the crack width of the beam increase,while the length of the plastic hinge decreases.The combination of high-strength concrete and high-strength steel bars improves the energy dissipation capacity and initial stiffness of the structure.

关 键 词：高强钢筋 高性能混凝土 低周反复荷载 梁柱节点 PIV技术 

分 类 号：TU352.11[建筑科学—结构工程]