| 引用本文: | 王思豪,刘玉擎,庄卫林,姚红兵.波形钢腹板组合梁抗震性能试验[J].哈尔滨工业大学学报,2018,50(3):61.DOI:10.11918/j.issn.0367-6234.201705067 |
| WANG Sihao,LIU Yuqing,ZHUANG Weilin,YAO Hongbing.Experimental investigation on seismic behaviors of composite girder with corrugated steel web[J].Journal of Harbin Institute of Technology,2018,50(3):61.DOI:10.11918/j.issn.0367-6234.201705067 |
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| 摘要: |
| 为探讨波形钢腹板内衬混凝土和焊接加劲肋的两种构造波形钢腹板组合梁抗震性能，通过剪跨比为1.67的波形钢腹板组合梁缩尺模型拟静力加载试验，比较分析了破坏特点、滞回曲线、承载力、延性、强度与刚度退化、耗能能力、变形恢复能力等基本力学特性.研究结果表明：钢腹板内衬混凝土和焊接加劲肋的波形钢腹板组合梁分别为弯剪和剪切破坏，腹板分别发生局部屈曲和整体屈曲，混凝土板根部均产生剪切斜裂缝；内衬混凝土相比焊接加劲肋的波形钢腹板组合梁的承载力、延性和耗能能力较高；两种构造均可提高腹板稳定性，滞回曲线形状相对饱满，强度退化系数均大于0.9，粘滞阻尼系数大于0.2，残余变形率小于0.61，表明两种构造的波形钢腹板组合梁强度退化不明显，耗能能力和变形恢复能力较强.
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| 关键词: 组合梁桥 波形钢腹板 内衬混凝土 加劲肋 抗震性能 |
| DOI：10.11918/j.issn.0367-6234.201705067 |
| 分类号:U448.216 |
| 文献标识码:A |
| 基金项目:国家自然科学基金(51578406) |
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| Experimental investigation on seismic behaviors of composite girder with corrugated steel web |
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WANG Sihao1,LIU Yuqing1,ZHUANG Weilin2,YAO Hongbing2
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(1. Department of Bridge Engineering, Tongji University, Shanghai 200092, China; 2. Sichuan Province Transport Department Highway Planning, Survey, Design and Research Institute, Chengdu 610041, China)
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| Abstract: |
| To investigate the seismic behaviors of partially encased composite girder with corrugated steel web and composite girder with stiffened corrugated steel web, the pseudo static models tests with shear span ratio of 1.67 were conducted. The basic seismic performances including failure features, hysteretic curves, load-carrying capacity, ductility, strength and stiffness degradation, energy dissipation and deformation recovery ability were analyzed. The results indicate that the partially encased specimen presented bending-shear failure with local buckling of the corrugated steel web, while the stiffened one was failed by shearing and overall buckling of the web. In addition, the inclined cracks appeared at the end of fixed part for all tested bodies. Compared with the stiffened girder, the partially encased one exhibited a higher load-carrying capacity, ductility and energy dissipation ability. These two kinds of webs can improve the stability of the corrugated steel web, the hysteretic curves are relatively plump and the strength degradation coefficients are greater than 0.9, the viscous damping coefficients are more than 0.2, and the residual deformation ratios are less than 0.61. All of these data indicate that the proposed webs have the smaller strength degradation, and greater energy dissipation and deformation recovery ability.
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| Key words: composite girder bridge corrugated steel web concrete encasement stiffener seismic behavior |
