强震作用下大跨度钢筋混凝土输煤栈桥抗震性能研究  

Seismic performance of large span RC coal trestle under strong earthquakes

作　　者：吴王平 刘书贤[2] 刘书会 魏晓刚[4,5] 王志强 WU Wangping1 , LIU Shuxian2, LIU Shuhui3, WEI Xiaogang4,5, WANG Zhiqiang6(1. China Electronics Engineering Design Institute （CEEDI） , Beijing 100036, China; 2. College of Civil Engineering, Liaoning Technical University, Fuxin 123000, China; 3. Bridge Department, Fuxin Highway School, Fuxin 123000, China; 4. Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, China; College of Civil Engineering and Architecture, Zhengzhou Institute of Aeronautical Industry Management, Zhengzhou 450046, China; 6. Hengda Coal Industry Company, Fuxin 123000, China)

机构地区：[1]中国电子工程设计院,北京100036 [2]辽宁工程技术大学土木工程学院,辽宁阜新123000 [3]阜新公路学校桥梁教研室,辽宁阜新123000 [4]中国地震局工程力学研究所,黑龙江哈尔滨150080 [5]郑州航空工业管理学院土木建筑工程学院,河南郑州450046 [6]恒大煤业公司,辽宁阜新123000

出　　处：《建筑结构学报》2018年第4期74-81,共8页Journal of Building Structures

基　　金：国家自然科学基金项目(51474045,51174038);辽宁省教育厅科学技术研究指导性项目(L2012111);中国煤炭工业协会科学技术研究指导性计划项目(MTKJ2014-192,MTKJ2012-319)

摘　　要：以某选煤厂钢筋混凝土输煤栈桥为研究对象,对其进行了现场自振频率实测,并采用ABAQUS软件建立了“栈桥桁架-框架柱”整体结构数值模型,基于结构实测振动频率对数值模型进行了修正。采用修正的数值模型分析研究了7度罕遇地震作用下大跨度输煤栈桥的抗震性能。测试与计算结果表明：采用该输煤栈桥模型进行弹塑性时程分析得到的数值模拟结果与实测结果较为一致,证明了该数值模型可信、高效;栈桥的框架柱是主要的抗震防线,其弹塑性水平振动位移相对较大,耗散了大量栈桥桥身桁架的地震能量,具有良好的变形与耗能能力;输煤栈桥桥身桁架具有较高的抗震承载能力,可抑制框架柱的侧向水平位移,且具有明显的复位作用,能够起到第二道抗震防线的作用;在7度罕遇地震作用下框架柱最大的弹塑性层间位移角为1/107,栈桥桁架最大的挠度与跨径的比值为1/1 984,均满足相关规范的规定。研究结果表明该输煤栈桥具有良好的抗震性能,无需进行加固。ARC coal trestle was researched in this research program. The field self-vibration frequency measurement were used. The finite element software ABAQUS was used to establish the whole structural numerical model of ＇ bridge truss-frame column＇ The numerical model was corrected by the measured vibration frequency. The seismic performance of the large span coal conveying trestle under 7 degree of rare earthquake was studied using the corrected numerical model. Test and calculation results have shown that： the coal trestle model using elasto-plastie time history analysis can yield numerical simulation results consistent with experimental results, which proves the credibility and efficiency of the numerical model. The frame columns are the main seismic fortification line. The elasto-plastic displacement of horizontal vibration is relatively great and dissipates most seismic energy of the trestle bridge truss, showing good displacement ductility and energy dissipation capacity. The coal trestle bridge truss has high seismic bearing capacity. The lateral horizontal displacement of frame column can be inhibited, indicating the trestle bridge truss has obvious deformation reduction effect and can be the second seismic line. The biggest elasto-plastic inter-story displacement angle under 7 degree of rare earthquake is 1/107. The maximum deflection to span ratio of bridge truss is 1/1 984. It meets the relevant codes. The coal trestle has good seismic performance without strengthening.

关 键 词：大跨度输煤栈桥 振动频率 现场实测 数值模型 动力响应 抗震性能 

分 类 号：TU272.1[建筑科学—建筑设计及理论]