新型端板螺栓连接框架节点抗震性能试验研究
发布时间：2019-03-29 09:00
【摘要】：提出了一种新型预应力混凝土梁、连续复合螺旋箍筋混凝土柱及端板螺栓连接的装配式节点,该节点的基本构造为:采用高强螺栓通过外伸端板将梁与柱装配在一起,并在梁柱中均采用连续复合螺旋箍筋,另在梁中配置预应力筋与普通钢筋,普通钢筋通过墩头与端板焊接在一起,且在节点核心区处采用钢板箍替代箍筋。该节点传力明确,且避免了核心区钢筋纵横交错的现象。为研究该节点的抗震性能,通过拟静力试验对该节点的滞回曲线、延性、高强螺旋箍筋对混凝土的约束作用等进行了分析。试验结果表明:节点破坏前,梁端出现了明显的塑性铰,节点具有较好的延性及耗能能力,且柱子和核心区的损坏程度较小,密配高强螺旋箍筋的约束作用能有效地提高构件的抗剪承载力和结构的变形能力。
[Abstract]:A new type of prestressing concrete beam, continuous composite spiral stirrups concrete column and end plate bolted joint is presented. The basic structure of the joint is as follows: using high strength bolt to assemble beam and column by extending end plate, Continuous composite spiral stirrups are used in beams and columns. In addition, pre-stressed bars and common steel bars are arranged in the beam. Ordinary reinforcement is welded together through pier head and end plate, and steel plate hoop is used to replace stirrups in the core area of the joint. The force transfer of the joint is clear, and the phenomenon of steel bar crisscross in the core area is avoided. In order to study the seismic performance of the joint, the hysteretic curve, ductility and the restraint effect of high strength spiral stirrups on concrete were analyzed by pseudo-static test. The experimental results show that the beam end has obvious plastic hinge before the joint failure, the joint has better ductility and energy dissipation capacity, and the damage degree of column and core area is small. High strength spiral stirrups can effectively improve the shear capacity and the deformation capacity of the structure under the restraint action of compacted high strength spiral stirrups.
【作者单位】： 西安建筑科技大学土木工程学院;
【分类号】：TU398.9;TU352.11
[Abstract]:A new type of prestressing concrete beam, continuous composite spiral stirrups concrete column and end plate bolted joint is presented. The basic structure of the joint is as follows: using high strength bolt to assemble beam and column by extending end plate, Continuous composite spiral stirrups are used in beams and columns. In addition, pre-stressed bars and common steel bars are arranged in the beam. Ordinary reinforcement is welded together through pier head and end plate, and steel plate hoop is used to replace stirrups in the core area of the joint. The force transfer of the joint is clear, and the phenomenon of steel bar crisscross in the core area is avoided. In order to study the seismic performance of the joint, the hysteretic curve, ductility and the restraint effect of high strength spiral stirrups on concrete were analyzed by pseudo-static test. The experimental results show that the beam end has obvious plastic hinge before the joint failure, the joint has better ductility and energy dissipation capacity, and the damage degree of column and core area is small. High strength spiral stirrups can effectively improve the shear capacity and the deformation capacity of the structure under the restraint action of compacted high strength spiral stirrups.
【作者单位】： 西安建筑科技大学土木工程学院;
【分类号】：TU398.9;TU352.11
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