| Author Name | Affiliation | | Wei Liu | Institute of Ocean and Civil Engineering, Dalian Ocean University, Dalian 116023,Liaoning,China | | Jinqing Jia | State Key Laboratory of Coastal and Offshore Engineering，Dalian University of Technology, Dalian 116024, Liaoning, China | | Jian Su | Institute of Ocean and Civil Engineering, Dalian Ocean University, Dalian 116023,Liaoning,China |
|
| Abstract: |
| SRUHSC-RC(Steel Reinforced Ultra High Strength Concrete-Reinforced Concrete) structures are used extensively in super high-rise buildings. However, it has obvious brittleness. Wrapping structural steel inside is a good way to alleviate the brittleness problem. The purpose of this study is to investigate seismic behavior of SRUHSC-RC exterior joints on the basis of experimental results of eleven specimens under the reversed cyclic loading. The relationship among the force-displacement curve, ductility, energy dissipation property, strength degradation, stiffness degradation, the strains of steel bone and stirrup at the core area of the joint were analyzed based on the test results. It is shown that axial compression ratio and stirrup volumetric ratio have significant effects on the shear behavior of SRUHSC-RC frame exterior joints. The general requirement on the axial-load level and the amount of confinement stirrup for the joints in the design is suggested. |
| Key words: exterior joints steel ultra-high strength ductility shear resistance. |
| DOI：10.11916/j.issn.1005-9113.21061 |
| Clc Number:TU317 |
| Fund: |
|
| Descriptions in Chinese: |
| 低周往复荷载下SRUHSC-RC框架节点抗震性能试验研究 刘伟1，贾金青2，苏健1 （1.大连海洋大学海洋与土木工程学院；大连116023；2.大连理工大学 海岸与近海工程国家重点实验室 大连 116024） 摘要：由于超高强混凝土强度高、耐久性优异，使得钢骨超高强混凝土结构在超高层建筑中得到广泛应用。但超高强混凝土脆性特征明显，而内置钢骨是解决材料脆性问题的一种有效方法。本文开展了11组钢骨超高强混凝土柱-钢筋混凝土梁框架边节点的抗震性能试验，分析了构件的荷载-位移关系、延性、耗能能力、强度和刚度退化规律、钢骨腹板及节点核心区箍筋应变分布规律。研究表明，轴压比和体积配箍率对钢骨超高强混凝土柱-钢筋混凝土梁框架边节点抗震性能具有显著影响，提出针对此类型节点设计的轴压比限值及最小配箍率等相关构造要求。 关键词：边节点；钢骨；超高强混凝土；延性；抗剪承载力 |
