内翻U形高强外包钢-高强混凝土连续组合梁截面设计及内力重分布试验研究
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摘要
设计了内翻U形高强外包钢-高强混凝土连续组合梁,并采用了一体式开孔板剪力连接件。为研究梁的内力重分布规律,对3根足尺两跨连续组合梁进行跨中对称单调加载。结果表明,梁中间支座截面和跨中截面塑性变形均充分发展,具有较好的转动能力和延性,能够保证塑性铰充分形成。通过试验和理论分析,提出了弯矩调幅系数β和力比R关系公式及限值,给出了极限承载力设计时弯矩的计算公式。
Inverted U-shaped high-strength encased steel and high-strength concrete continuous composite beam was designed with integral perforated steel shear connector. In order to study the internal force redistribution of beams, three full-scale two-span continuous composite beams were loaded symmetrically and monotonously in mid-span. The results show that the plastic deformations of the middle support section and the mid-span section of the beam are fully developed, which has good rotation ability and ductility, and can ensure the full formation of plastic hinges. Through experimental and theoretical analyses, the formula and limit value of the relationship between moment redistribution coefficient β and force ratio R were put forward, and the formula for calculating bending moment in the design of ultimate bearing capacity was given.
Inverted U-shaped high-strength encased steel and high-strength concrete continuous composite beam was designed with integral perforated steel shear connector. In order to study the internal force redistribution of beams, three full-scale two-span continuous composite beams were loaded symmetrically and monotonously in mid-span. The results show that the plastic deformations of the middle support section and the mid-span section of the beam are fully developed, which has good rotation ability and ductility, and can ensure the full formation of plastic hinges. Through experimental and theoretical analyses, the formula and limit value of the relationship between moment redistribution coefficient β and force ratio R were put forward, and the formula for calculating bending moment in the design of ultimate bearing capacity was given.
引文
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[5] 陈丽华. 新型外包钢-混凝土连续组合梁及梁柱节点的试验研究[D]. 南京:东南大学, 2006.
[6] CHEN L H, LI A Q, LOU Y, et al. Ultimate negative bending-moment capacity of outer-plated steel-concrete continuous composite beams[J]. Journal of Southeast University, 2009, 25(1): 89-93.
[7] XIAO H, LI A Q, DU D. Experimental study on ultimate flexural capacity of steel encased concrete composite beams[J]. Journal of Southeast University, 2005, 21(2): 191-196.
[8] 石启印,黄周瑜,李爱群.U型外包钢-混凝土组合梁延性的试验研究[J].西南交通大学学报,2008,43(2):206-212.
[9] 张瑜.开孔板剪力连接件性能分析[D]. 西安:西安建筑科技大学,2011.
[10] 朱聘儒,高向东.钢-混凝土组合连续梁塑性铰特性及内力重分布研究[J].建筑结构学报,1990,11(6):26-37.
[11] 樊健生,聂建国,叶清华,等.钢-压型钢板混凝土连续组合梁调幅系数的试验研究[J].建筑结构学报,2001,22(2):57-65.
[2] 聂建国,王洪全,谭英,等.钢-高强混凝土组合梁的试验研究[J].建筑结构学报,2004,25(1):58-62.
[3] 聂建国,李红有,唐亮.高强钢-混凝土组合梁受弯性能试验研究[J].建筑结构学报,2009,30(2): 64-69.
[4] 石启印,蔡建林,陈倩倩,等.新型外包钢混凝土组合梁抗扭的试验及分析[J].工程力学,2008,25(12):162-170.
[5] 陈丽华. 新型外包钢-混凝土连续组合梁及梁柱节点的试验研究[D]. 南京:东南大学, 2006.
[6] CHEN L H, LI A Q, LOU Y, et al. Ultimate negative bending-moment capacity of outer-plated steel-concrete continuous composite beams[J]. Journal of Southeast University, 2009, 25(1): 89-93.
[7] XIAO H, LI A Q, DU D. Experimental study on ultimate flexural capacity of steel encased concrete composite beams[J]. Journal of Southeast University, 2005, 21(2): 191-196.
[8] 石启印,黄周瑜,李爱群.U型外包钢-混凝土组合梁延性的试验研究[J].西南交通大学学报,2008,43(2):206-212.
[9] 张瑜.开孔板剪力连接件性能分析[D]. 西安:西安建筑科技大学,2011.
[10] 朱聘儒,高向东.钢-混凝土组合连续梁塑性铰特性及内力重分布研究[J].建筑结构学报,1990,11(6):26-37.
[11] 樊健生,聂建国,叶清华,等.钢-压型钢板混凝土连续组合梁调幅系数的试验研究[J].建筑结构学报,2001,22(2):57-65.