拉链柱支撑钢框架结构静力推覆试验及数值模拟
发布时间：2018-08-04 08:11
【摘要】：为研究拉链柱支撑钢框架结构在水平荷载作用下的承载能力、抗侧刚度、破坏模式以及构件的传力模式等,对一个3层单跨1∶2.6缩尺比例的拉链柱支撑钢框架进行了静力推覆试验及数值模拟。结果表明:在对应8度多遇及设防烈度地震作用工况的水平侧移下,结构基本处于弹性工作状态,构件未出现明显失稳现象。在对应8度罕遇地震作用工况的水平侧移下,由于支撑失稳导致结构抗侧刚度明显降低,但结构的承载力并无明显下降,随着加载的进一步进行,因支撑失稳产生的竖向不平衡力主要由拉链柱承担,且该不平衡力由此逐层向上传递,导致顶层支撑的轴压力逐渐增加;当反向卸载时,拉链柱构件承担部分压力,但并未失稳。总体上,结构各构件的受力状态及传力过程与设计目标基本一致,结构在静力推覆试验中表现出良好的受力性能。
[Abstract]:In order to study the bearing capacity, lateral stiffness, failure mode and force transfer mode of steel frame structure supported by zipper column under horizontal load, etc. The static push-over test and numerical simulation of a 3-story single-span 1: 2.6 scale steel frame braced with zipper column are carried out. The results show that the structure is basically in the elastic working state under the horizontal lateral movement corresponding to the frequent occurrences of 8 degrees and the earthquake action conditions of fortification intensity, and no obvious instability occurs in the members. The lateral stiffness of the structure is obviously decreased due to the instability of the bracing, but the bearing capacity of the structure does not decrease obviously under the condition of lateral displacement corresponding to the earthquake action of 8 degrees, and with the further loading, the bearing capacity of the structure does not decrease obviously. The vertical unbalance force caused by the instability of the bracing is mainly borne by the zipper column, and the unbalance force is passed up layer by layer, which results in the axial pressure of the top bracing gradually increasing; when unloaded in reverse, the zipper column member bears part of the pressure. But it is not unstable. On the whole, the stress state and the force transfer process of the structural members are basically consistent with the design goal, and the structure shows good mechanical performance in the static push-over test.
【作者单位】： 河北科技大学建筑工程学院;哈尔滨工业大学土木工程学院;
【基金】：国家自然科学基金项目(51208169) 河北省自然科学基金项目(E2014208115) 河北省教育厅项目(QN2016052)
【分类号】：TU391
，
本文编号：2163206
[Abstract]:In order to study the bearing capacity, lateral stiffness, failure mode and force transfer mode of steel frame structure supported by zipper column under horizontal load, etc. The static push-over test and numerical simulation of a 3-story single-span 1: 2.6 scale steel frame braced with zipper column are carried out. The results show that the structure is basically in the elastic working state under the horizontal lateral movement corresponding to the frequent occurrences of 8 degrees and the earthquake action conditions of fortification intensity, and no obvious instability occurs in the members. The lateral stiffness of the structure is obviously decreased due to the instability of the bracing, but the bearing capacity of the structure does not decrease obviously under the condition of lateral displacement corresponding to the earthquake action of 8 degrees, and with the further loading, the bearing capacity of the structure does not decrease obviously. The vertical unbalance force caused by the instability of the bracing is mainly borne by the zipper column, and the unbalance force is passed up layer by layer, which results in the axial pressure of the top bracing gradually increasing; when unloaded in reverse, the zipper column member bears part of the pressure. But it is not unstable. On the whole, the stress state and the force transfer process of the structural members are basically consistent with the design goal, and the structure shows good mechanical performance in the static push-over test.
【作者单位】： 河北科技大学建筑工程学院;哈尔滨工业大学土木工程学院;
【基金】：国家自然科学基金项目(51208169) 河北省自然科学基金项目(E2014208115) 河北省教育厅项目(QN2016052)
【分类号】：TU391
，
本文编号：2163206
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