预制钢筋混凝土长柱抗震性能研究

Research on Seismic Behavior of Precast Reinforced Concrete Long Columns

预制钢筋混凝土长柱由于其施工效率高、建筑质量好和环境污染少等优点,得到广泛的发展和应用。为了保证预制钢筋混凝土长柱设计和使用安全,其抗震性能已经引起越来越多的关注。在实际工程应用中,许多预制钢筋混凝土长柱处于高轴压比状态,但是其抗震性能却未得到详细的分析。本文通过建立预制钢筋混凝土长柱的有限元分析模型,分析高轴压比对预制钢筋混凝土长柱抗震性能的影响规律,对比研究其滞回性能、承载力、耗能和延性等。研究结果表明:轴压比增大对其峰值承载力具有正向作用,但是其总耗能能力和延性下降;并且随着轴压比增大,预制钢筋混凝土长柱的损伤程度也在逐渐提高。

Precast reinforced concrete long columns have been widely developed and applied because of their high construction efficiency, good building quality and less environmental pollution. In order to ensure the design and use safety of precast reinforced concrete long columns, their seismic performance has attracted more and more attention. In practical engineering applications, many precast reinforced concrete long columns are under high axial compression ratio, but their seismic performance has not been analyzed in detail. In this study, the influence law of high axial compression ratios on the seismic performance of precast reinforced concrete long columns are analyzed by establishing the finite element analysis model of precast reinforced concrete long columns, and its hysteretic performance, bearing capacity, energy consumption and ductility are compared in detail. The results show that the increase of axial compression ratio has a positive effect on its peak bearing capacity, but its total energy consumption capacity and ductility decrease;with the increase of axial compression ratio, the damage degree of precast reinforced concrete long columns increases gradually.