高烈度山区机场高架桥墩抗震性能试验研究  

Experimental Study on Seismic Performance of Airport Viaduct Piers in High Intensity Mountain Areas

作　　者：高博 杨建荣[1] 李睿[1] GAO Bo;YANG Jianrong;LI Rui(Kunming University of Science and Technology,Faculty of Civil Engineering and Mechanics,Kunming,Yunnan650500,China)

机构地区：[1]昆明理工大学建筑工程学院,云南昆明650500

出　　处：《施工技术（中英文）》2024年第11期1-8,共8页Construction Technology

基　　金：国家自然科学基金(51568029)。

摘　　要：为了探究高烈度山区机场高架桥桥墩的抗震性能,设计制作了不规则三柱式排架,并开展了拟静力试验,得到不规则三柱式排架在水平低周往复荷载作用下的破坏形态和抗震性能。建立考虑弯-剪耦合效应的数值分析模型,并与试验结果进行对比,验证数值分析模型的准确性和有效性。研究结果表明,结构受力分配不合理导致短墩发生剪切破坏,丧失承载能力,长墩抗震性能未充分发挥。在此基础上,对比设置钢管混凝土短墩排架的承载能力、延性和耗能系数,得知设置钢管混凝土短墩排架承载能力和延性系数分别提高了43.23%,64.27%,耗能能力好于钢筋混凝土短墩排架,具有更好的抗震性能。To explore the seismic performance of viaduct piers in high intensity mountain airport areas,an irregular three-column bracing system was designed and manufactured.Quasi-static tests were conducted to investigate the failure mode and seismic performance of the irregular three-column bracing system under horizontal low-cycle reciprocal loading.A numerical analysis model considering the bending-shear coupling effect was established and compared with the experimental results to validate the accuracy and effectiveness of the numerical analysis model.The research findings indicate that the unreasonable stress distribution in the structure leads to shear failure and loss of bearing capacity in short piers,while the seismic performance of long piers is not fully utilized.Based on this,comparisons were made regarding the bearing capacity,ductility,and energy dissipation coefficient of the steel pipe concrete short pier bracing system.It was found that the bearing capacity and ductility of the steel pipe concrete short pier bracing system increased by 4323%and 6427%,respectively,and its energy dissipation capability far exceeded that of the reinforced concrete short pier bracing system,demonstrating superior seismic performance.

关 键 词：桥梁 抗震性能 试验 数值分析 

分 类 号：U211[交通运输工程—道路与铁道工程]