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Seismic displacements and behaviour factors assessment of an innovative steel and concrete hybrid coupled shear wall system
Structures ( IF 4.1 ) Pub Date : 2021-07-28 , DOI: 10.1016/j.istruc.2021.07.058
Molham Salameh 1 , Mohsenali Shayanfar 1 , Mohammad Ali Barkhordari 1
Affiliation  

The objective of this research is to facilitate the design process of innovative steel and concrete hybrid coupled wall system, which is obtained through the connection of a reinforced concrete (RC) wall to two steel side columns by means of steel links. To this end, a group of 120 innovative hybrid coupled wall systems subjected to a set of 100 far-field ground motions are selected. Thousands of nonlinear dynamic time histories on the basis of incremental dynamic analysis (IDA) are carried out in order to generate a databank of specified response quantities. Subsequently, nonlinear regression analyses are conducted in order to derive simple formulae which offer a direct estimation of: fundamental periods of vibration, seismic displacements, ductility demands and behaviour factors q for both designed and undesigned structures at different limit states; involving steel first yielding of internal wall, various predefined maximum inter-storey drifts and links rotations values. The effect of the following parameters: number of storeys, coupling ratio value, steel area ratio of boundary elements, uniformity status of shear links, and length of links is thoroughly investigated. The results indicate that storeys number and uniformity status parameters have the largest influence on the most of response quantities. The current q behaviour factor value is approximately suitable for low-rise building, but it is highly underestimated in medium-rise buildings. Furthermore, the equal-displacement rule clearly overestimates the roof ductility. Overall, this study bridges the gaps about the innovative hybrid coupled wall system design methodology and enables a rapid seismic assessment of such structures.



中文翻译:

一种新型钢混凝土混合耦合剪力墙系统的地震位移和行为因素评估

本研究的目的是促进创新的钢和混凝土混合耦合墙系统的设计过程,该系统是通过钢筋混凝土 (RC) 墙通过钢连接连接到两个钢侧柱而获得的。为此,选择了一组 120 个创新的混合耦合墙系统,这些系统受到一组 100 个远场地面运动的影响。执行基于增量动态分析 (IDA) 的数千个非线性动态时间历程,以生成指定响应量的数据库。随后,进行非线性回归分析以推导出简单的公式,这些公式可直接估算:振动的基本周期、地震位移、设计和未设计结构在不同极限状态下的延展性要求和行为因子 q;涉及内墙的钢首次屈服,各种预定义的最大层间漂移和链接旋转值。对以下参数的影响进行了深入研究:层数、耦合比值、边界元素的钢筋面积比、剪切链接的均匀性状态和链接长度。结果表明,层数和均匀性状态参数对大多数响应量的影响最大。当前的 q 行为因子值近似适用于低层建筑,但在中层建筑中被严重低估。此外,等位移规则显然高估了屋顶延展性。全面的,

更新日期:2021-07-29
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