论文部分内容阅读
钢管约束钢筋混凝土短柱具有优越的延性和弹塑性层间变形能力,因此在转换柱中应用时可显著提高转换结构的整体抗震性能。对大连中国石油大厦外筒的钢管约束钢筋混凝土转换短柱进行了抗震性能模型试验,模型比例为1∶6。试验中的主要参数为轴压比、剪跨比和对拉钢筋设置。试验结果表明,钢管约束混凝土短柱中,钢管对核心混凝土的有效约束限制了核心混凝土剪切破坏的产生,改变了钢筋混凝土短柱在水平地震作用下的剪切脆性破坏模式。在抗震工程中采用钢管约束钢筋混凝土柱可有效提高钢筋混凝土框架短柱的延性、弹塑性层间变形能力和耗能性能,从而显著提高结构的整体抗震性能。
Steel tube confined reinforced concrete short columns have excellent ductility and elastic-plastic deformation between layers, so the conversion column can significantly improve the overall seismic performance of the conversion structure. The seismic performance model test of the steel-pipe confined reinforced concrete shortening column of the external cylinder of Dalian China Petroleum Tower was carried out. The model ratio is 1: 6. The main parameters in the experiment are axial compression ratio, shear span ratio and tensile reinforcement setting. The experimental results show that the effective constraint of the steel tube to the core concrete in the concrete-filled steel tube confined concrete column limits the shear failure of the core concrete and changes the brittle failure mode of the reinforced concrete short column under horizontal earthquake. The use of steel tube confined RC columns in seismic engineering can effectively improve the ductility, elastic-plastic interlayer deformability and energy dissipation performance of reinforced concrete frame stub columns, so as to significantly improve the overall seismic performance of the structure.