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首页> 外文期刊>Bulletin of earthquake engineering >A contribution to seismic shear design of R/C walls in dual structures
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A contribution to seismic shear design of R/C walls in dual structures

机译：对双结构钢筋混凝土墙抗震剪力设计的贡献

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The paper focuses on the seismic response of walls in dual (frame + wall) structures, with particular emphasis on shear behaviour. Although dual structures are widely used in earthquake-resistant medium-rise and high-rise buildings, the provisions of modern seismic codes regarding design of walls for shear are not fully satisfactory, particularly in the (common) case that walls of substantially different length form part of the same structure. Relevant provisions of the leading seismic codes are first summarised and their limitations discussed. Then an extensive parametric study is presented, involving two multistorey dual systems, one with identical walls, and one with walls with unequal length, designed to the provisions of Eurocode 8 for two different ductility classes (H and M). The walls of the same structures are also designed to other methods such as those used in New Zealand and Greece. The resulting different designs are then assessed by subjecting the structures to a suite of strong ground motions, carrying out inelastic time history analysis, and comparing the results against design action effects. It is found that although modern code procedures generally lead to satisfactory performance (differences among them do exist), the design of walls seems to be less appropriate in the case of unequal length walls. For this case a modified procedure is proposed, consisting of an additional factor to account for the relative contribution of walls of the same length to the total base and an improved envelope of wall shears along the height; this improved method seems to work better than the other procedures evaluated herein, but further calibration is clearly required.
机译：本文重点研究双（框架+墙）结构中墙体的地震反应，特别着重于剪切行为。尽管双重结构广泛用于抗震的中层和高层建筑中，但现代抗震规范中关于剪力墙设计的规定并不完全令人满意，特别是在长度截然不同的墙体形式的（常见）情况下相同结构的一部分。首先总结了主要地震法规的相关规定，并讨论了其局限性。然后进行了广泛的参数研究，涉及两个多层双系统，一个具有相同的壁，一个具有不等长的壁，其设计符合欧洲规范8对两种不同延性等级（H和M）的规定。相同结构的墙还按照其他方法设计，例如在新西兰和希腊使用的方法。然后，通过使结构经受一系列强烈的地面运动，进行非弹性时程分析并将结果与​​设计作用效果进行比较，来评估由此产生的不同设计。已经发现，尽管现代代码程序通常可以带来令人满意的性能（它们之间确实存在差异），但是在长度不相等的情况下，壁的设计似乎不太合适。对于这种情况，提出了一种修改过的程序，其中包括一个额外的因素，以说明相同长度的墙对整个基础的相对贡献，以及沿高度对墙剪的改善的包络。这种改进的方法似乎比本文评估的其他过程更好地工作，但是显然需要进一步的校准。

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