【摘要】：針對(duì)裝配式外套筒-加強(qiáng)式外伸端板組件梁與柱連接節(jié)點(diǎn)試件進(jìn)行低周往復(fù)加載、單調(diào)加載試驗(yàn),研究節(jié)點(diǎn)的受力機(jī)制、破壞模式、承載能力、耗能能力、延性和剛度退化等抗震性能。研究結(jié)果表明:節(jié)點(diǎn)初始轉(zhuǎn)動(dòng)剛度隨外套筒壁厚的增加而增大,當(dāng)外套筒壁厚由12mm增大到14mm時(shí),節(jié)點(diǎn)初始轉(zhuǎn)動(dòng)剛度增大約17%。增大外套筒壁厚延遲節(jié)點(diǎn)的剛度退化速度;梁與柱采用高強(qiáng)螺栓外伸端板組件連接,可以提高節(jié)點(diǎn)的變形和耗能能力。梁柱對(duì)拉螺栓連接產(chǎn)生一定的"對(duì)拉效應(yīng)",使節(jié)點(diǎn)具有較大的轉(zhuǎn)動(dòng)能力,試件轉(zhuǎn)角均超過0.035rad,可以滿足"強(qiáng)節(jié)點(diǎn)"和大震對(duì)連接節(jié)點(diǎn)轉(zhuǎn)動(dòng)能力的要求;但是過于顯著的對(duì)拉效應(yīng),使節(jié)點(diǎn)產(chǎn)生滑移,滯回環(huán)由"弓形"過渡到"反S形",節(jié)點(diǎn)的耗能能力下降。設(shè)計(jì)中應(yīng)通過選擇合理的螺栓直徑和外套筒壁厚、合理控制對(duì)拉螺栓的伸長值、減少外套筒與柱壁間的加工誤差等措施,提高節(jié)點(diǎn)的剛度以及耗能能力。
[Abstract]:The load-bearing mechanism, failure mode, load-carrying capacity, energy dissipation capacity of the joints are studied by low-cycle reciprocating loading and monotonic loading test for the specimens with assembled outer sleeve and stiffened extension end-plate components. Seismic performance such as ductility and stiffness degradation. The results show that the initial rotational stiffness of the joint increases with the increase of the outer sleeve wall thickness. When the external sleeve wall thickness increases from 12mm to 14mm, the initial rotational stiffness of the joint increases by about 17 parts. The deformation and energy dissipation capacity of the joints can be improved by increasing the stiffness degradation speed of the delayed joints of the outer sleeve wall thickness and connecting the beams and columns with the high-strength bolt extension end-plate components. Liang Zhu has a certain "pull effect" on the connection of pulling bolt, which makes the joint have greater rotation ability, and the rotation angle of the specimen exceeds 0.035 rad. it can meet the requirements of the "strong joint" and the strong earthquake on the connection joint rotation ability. However, if the tensile effect is too significant, the joint will slip, the hysteresis loop will transition from "bow" to "anti-S", and the energy dissipation capacity of the joint will decrease. In order to improve the stiffness and energy dissipation of joints, the reasonable bolt diameter and wall thickness of outer sleeve should be selected, the elongation value of pulling bolt should be controlled reasonably, and the machining error between outer sleeve and column wall should be reduced.
【作者單位】： 青島理工大學(xué);
【基金】：國家自然科學(xué)基金面上項(xiàng)目(51678316) 國家重點(diǎn)研發(fā)計(jì)劃“綠色建筑及建筑工業(yè)化”重點(diǎn)專項(xiàng)(2016YFC0701204)
【分類號(hào)】：TU352.11;TU391

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