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进行足尺试验来研究受压后的预应力撑杆柱的强度和性能。对18个试件的荷载-端部缩短曲线进行介绍。试验验证了屈曲的两种临界模式:对称和反对称,并研究预应力撑杆柱的缺陷敏感。当独立的对称屈曲荷载模式和反对称屈曲荷载模式靠近或反对称模式接近临界时,相关屈曲开始变得显著。对试验结果进行分析发现,对称模式中发生失稳时预应力的增强会导致支撑荷载能力的增强,但反对称模式中则会出现与其相反的趋势。
Full-scale tests were conducted to study the strength and performance of the pre-stressed post. The load-tip shortening curves of 18 specimens are introduced. Two critical modes of buckling were verified by experiments: symmetry and antisymmetry, and the sensitivity of the prestressed strut columns to defects was investigated. The relative buckling starts to become significant when the independent symmetrical buckling load mode and the anti-symmetric buckling load mode approach or anti-symmetry mode approach the critical level. The analysis of the test results shows that the increase of the prestressing force in the symmetrical mode leads to the increase of the supporting load capacity, but contrary to the anti-symmetrical mode, the opposite trend occurs.