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前言在地震区的工业厂房柱列之间,如果在交叉支撑中部设置消能内框(如图1所示),在地震过程中使内框产生一定的塑性变形,则将消耗由地震引起的部分能量,提高柱间支撑的阻尼比,减小地震力,而且可以增大结构的延性,提高厂房的纵向抗震性能。消能支撑在低周反复荷载作用下的试验说明,内框杆件的塑性变形发挥越充分,消能支撑的滞回特性就越好。对处于弯矩、剪力和轴力共同反复作用下的消能支撑内框杆件的刚度和强度目前尚无计算方法可以借鉴;为了研究这些问题,我们进行了2根槽钢模拟梁、5个钢筋混凝土榧消能支撑内框杆件和4个钢柱框消能支撑内框杆件在低周反复荷载作用下的试验,并结合国外有关的试验论述,对钢梁的弯矩—曲率关系、挠度延性系数、阻尼比以及极限强度进行了分析研究,为内框杆件
Foreword Between the column columns of the industrial buildings in the earthquake area, if the energy dissipation inner frame (as shown in Fig. 1) is set in the middle of the cross-support, the inner frame will have a certain plastic deformation during the earthquake, and it will consume the earthquake-induced Part of the energy, to improve the damping ratio between the column to support, reduce seismic forces, but also can increase the ductility of the structure, improve the vertical seismic performance of the plant. The test of energy dissipating support under the effect of low-cycle repeated load shows that the more fully the plastic deformation of the inner frame member is, the better the hysteretic characteristic of the energy dissipating support is. There is no calculation method for the rigidity and strength of the energy dissipation support inner frame member under the combined action of bending moment, shear force and axial force. To study these problems, we performed 2 channel steel simulation beams, 5 The reinforced concrete ray energy dissipation support inner frame member and the four steel column frame energy dissipation support inner frame member under the low cyclic repeated load test, and combined with foreign related experiments, the bending moment-curvature of the steel beam Relationships, deflection ductility coefficients, damping ratios, and ultimate strengths were analyzed and studied for the internal frame members.