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Analytical Investigation of the Effects of HF2V Damping Devices on the Seismic Performance of the SAC LA3 Building

机译:HF2V阻尼装置对SAC LA3建筑物抗震性能影响的分析研究

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摘要

In this paper, the seismic performance of a 3 storey seismic frame with rigid moment connections at the beam ends (commonly known as the SAC LA3 building) is compared with that of the same frame using semi-rigid connections with high force to volume (HF2V) lead dissipators. The presence of the gravity frames in the model is also considered. It was found that the use of semi-rigid connections with HF2V dissipators, ignoring the effect of the gravity frames, caused a 12% increase in period of the frame due to the decreased stiffness of the connections. Accelerations were slightly lower and there was up to an 80% increase in peak drift, and a 200% increase in the permanent displacement compared to the as-designed case, but no structural damage was expected. When gravity frames were considered, the floor accelerations decreased further, the peak displacements do not significantly change, but the residual storey drift ratios reduced to approximately 0.17%. This result is less than one half that of the as-designed frame, where typically gravity frame effects are not considered. The analyses show that combining HF2V lead dissipators with gravity frames and well-designed non-structural elements creates a system with almost no structural damage and low residual displacements.
机译:在本文中,将梁端部具有刚性弯矩连接的三层地震框架(通常称为SAC LA3建筑物)的抗震性能与使用高刚度(HF2V)半刚性连接的相同框架的抗震性能进行了比较。 )铅耗散剂。还考虑了模型中重力框架的存在。发现与HF2V耗散器一起使用半刚性连接时,忽略了重力框架的影响,由于连接的刚度降低,导致框架周期增加了12%。与设计情况相比,加速度略低,峰值漂移最多增加了80%,永久位移增加了200%,但预计不会发生结构损坏。当考虑重力框架时,地板加速度进一步降低,峰值位移没有显着变化,但是残余的楼层漂移率降低到大约0.17%。该结果小于设计框架的一半,在设计框架中通常不考虑重力框架效应。分析表明,将HF2V铅耗散器与重力框架和经过精心设计的非结构性元件相结合,可以创建几乎没有结构性损坏且残余位移低的系统。

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