双凹摩擦摆隔震烟风道结构地震响应

发布时间：2018-05-30 02:03

本文选题：隔震 + 烟风道　；参考：《力学与实践》2017年05期

【摘要】：传统烟风道板式滑动支座可减少道体热胀冷缩时的摩擦阻力,但抗震耗能能力不足,缺少变形后的复位能力,且会约束道体的转动而可能导致结构破坏.将摩擦摆隔震支座用于烟风道,可同时具有热滑移、隔震功能,允许道体在温度作用下自由转动.本文对烟风道采用双凹摩擦摆中间隔震的结构体系地震响应进行了研究,建立了横向地震作用下简化的三自由度地震响应分析模型,其中双凹摩擦摆采用三线性滞回模型,推导了一阶状态空间微分运动方程.该模型的分析结果与有限元实体模型分析结果非常接近.利用简化模型研究了不同场地类别、不同强度地震激励作用下双凹摩擦摆的恢复力特点及隔震效果,结果表明:与非隔震结构相比,双凹摩擦摆隔震的烟风道的道体反力、支架剪力均得到了控制.
[Abstract]:The traditional plate sliding support of the flue duct can reduce the friction resistance of the track body when it is hot expanding and shrinking, but the seismic energy dissipation capacity is insufficient, the ability of restoring after deformation is lacking, and the structure may be destroyed by restricting the rotation of the track body. The friction pendulum isolation support can be used in the smoke duct with thermal slip and isolation function, allowing the track body to rotate freely under the action of temperature. In this paper, the seismic response of a structure system with interval earthquakes in a double concave friction pendulum is studied, and a simplified seismic response analysis model with three degrees of freedom under transverse earthquake is established, in which a trilinear hysteretic model is used for the double concave friction pendulum. The differential equations of motion in the first order state space are derived. The results of the model are very close to that of the finite element solid model. In this paper, the characteristics of restoring force and isolation effect of double concave friction pendulum under different site types and different intensity earthquake excitation are studied by using simplified model. The results show that compared with non-isolated structure, the duct body reaction force of smoke duct isolated by double concave friction pendulum is higher than that of non-isolated structure. The shearing force of the support is controlled.
【作者单位】：山东大学土建与水利学院;
【基金】：国家自然科学基金(41172267) 国家科技支撑计划(2015BAB07B05) 2016年国家级大学生创新创业训练计划(201610422087)资助
【分类号】：TU311.3;TU352.12

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