内嵌钢板混凝土组合连梁抗震性能与设计方法研究

In view of the problems associated with insufficient shear capacity, poor performance ductile deformation and complex construction, it is effective to improve coupling beam behavior by using steel plates with good plastic deformation and different tension field characteristics to resist shear. In this project, the embedded steel plate reinforced concrete composite (SPRC or PRC) coupling beams are designed and improved, and the seismic performance and design method is researched. The influence mechanism of the plate different tension field distribution after buckling and buckling modes on coupling beam ductility and energy dissipation are revealed. The analysis of plate thickness, height to thickness ratio and studs arrangement on the failure pattern and seismic performance of SPRC coupling beam is systematically carried out by means of theoretical analysis, numerical simulation and experiment investigation, and the restoring force characteristic curve of coupling beam is especially proposed. Meanwhile, on the basis of parameter analysis, the bent and shear bearing capacity calculation formulas and shear theoretical model for SPRC coupling beam are established. The displacement angle limits under different performance levels or other performance indicators are studied. In application of numerical simulation, the influence of different structural measures on the failure pattern and seismic performance of shear wall - coupling beam joint are analyzed, and the related design calculation methods for steel plate anchorage length, studs or other shear connectors are established. These research findings are expected to lay the founding for the further design theory and engineering applications of steel plate concrete composite structure.

针对传统剪力墙连梁抗剪能力不足、延性变形性能差且施工复杂等问题，利用钢板良好的塑性变形能力和屈服后不同拉力场特性，替代抗剪钢筋或交叉暗柱是提高连梁受力性能的一种有效措施。设计和改进内嵌钢板混凝土组合连梁的构造措施，提出内嵌双钢板混凝土组合连梁，并对其抗震性能和设计方法展开研究。采用试验研究、理论分析和数值模拟等手段，分析钢板厚度、高厚比、栓钉布置等对组合连梁破坏机理和抗震性能的影响，提出连梁恢复力特性曲线，揭示钢板屈曲后形成的不同拉力场分布和屈曲模态对连梁延性和耗能的影响机理。在参数分析基础上，建立组合连梁受弯和受剪承载力计算公式和抗剪理论模型。研究组合连梁各性能水准下的位移角限值或其他性能指标限值。通过数值模拟和理论分析，研究不同构造措施对节点破坏模式和抗震性能的影响，提出节点区钢板锚固长度、栓钉或其他连接件设计计算方法。研究成果可为钢板混凝土组合结构的设计理论及工程应用提供科学依据。

连梁作为核心筒的第一道抗震防线，一直是国内外科研工作者研究的重点构件，并以钢筋混凝土连梁为主要对象进行了大量的研究。但研究结果表明，钢筋混凝土连梁在各种新型配筋方案下，虽然综合抗震性能有所提高，但仍存在抗剪能力不足，剪切破坏严重，且滞回曲线具有明显的捏缩效应等问题，仅通过提高箍筋量和配筋形式对提高连梁延性和抗剪能力是有限的。.针对传统剪力墙连梁抗剪能力不足、延性变形性能差且施工复杂等问题，利用钢板良好的塑性变形能力和屈服后不同拉力场特性，替代抗剪钢筋或交叉暗柱是提高连梁受力性能的一种有效措施。设计和改进内嵌钢板混凝土组合连梁的构造措施，提出钢板混凝土组合连梁，并对其抗震性能和设计方法展开研究。采用试验研究、理论分析和数值模拟等手段，分析配板率、纵筋配筋率、配板形式等对组合连梁破坏机理和抗震性能的影响，提出连梁恢复力特性曲线，揭示钢板配置对连梁延性和耗能的影响。在参数分析基础上，建立组合连梁受弯和受剪承载力计算公式。研究成果可为钢板混凝土组合结构的设计理论及工程应用提供科学依据。