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针对预应力钢柱基底含摩擦型消能装置的耐震性能进行研究,探讨初始钢绞线预应力与消能装置的影响。通过钢绞线施拉预应力接合钢柱与基础,用来提供钢柱自复位能力;消能装置采用摩擦型消能,提供柱构件与基础接合的滞回消能能力,因此柱构件在受震后拥有自复位与无残余变形特性。研究参数包含初始预应力大小、摩擦消能面积与摩擦型消能装置的位置。通过理论推导建立预应力与消能装置在钢柱与基础接合的性能模式,进而设计试件进行试验来验证其性能。试验结果表明,柱与基础接合面有开启与闭合的现象;提高摩擦型消能装置螺栓的预应力量,能有效提升滞回消能面积;提升初始钢绞线预应力量,能使滞回循环远离原点,确保自复位能力;消能装置安装在柱翼板处比安装在柱腹板处有较好的消能能力,且较为经济。预应力钢柱基底含摩擦型消能装置具有良好的自复位能力,具有滞回消能能力且柱构件无残余变形,理论分析亦能准确预测其性能。
The seismic behavior of prestressed steel column with friction-based energy dissipater is studied, and the influence of prestress and energy dissipation device on initial strand is discussed. Prestressed steel strands and foundation are bonded through steel strands to provide self-resetting ability of steel columns; energy-dissipating devices adopt friction-type energy dissipating to provide hysteresis dissipative capability of column components to basic bonding, After the earthquake has a self-reset and no residual deformation characteristics. The parameters of the study include the size of the initial prestress, the area of frictional energy dissipation and the location of the friction-type energy dissipater. Through the theoretical derivation, the performance mode of the prestressing and energy dissipating devices in the bonding between the steel columns and the foundation is established, and then the test pieces are designed to test to verify their performance. The test results show that the joint between the column and the foundation has the phenomenon of opening and closing; increasing the prestressing force of the bolt of the friction type energy dissipation device can effectively increase the hysteretic energy dissipation area; increasing the initial prestressing force of the strand, Circulation away from the origin, to ensure self-reset capability; energy-dissipating device installed in the column wing than installed in the column web at a better energy dissipation capacity, and more economical. The prestressed steel column base with friction-type energy dissipater has good self-resetting ability, hysteresis dissipative capability and no residual deformation of column members, and theoretical analysis can accurately predict its performance.