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首页> 外文期刊>Soil Dynamics and Earthquake Engineering >A continuous-discrete approach for pre-design of flexible-base tall buildings with fluid viscous dampers
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A continuous-discrete approach for pre-design of flexible-base tall buildings with fluid viscous dampers

机译：采用流体粘性阻尼器的柔性基础高层建筑的预离散连续设计方法

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摘要

An equivalent coupled-two-beam (CTB) discrete model is presented to compute the dynamic response in time domain of flexible-base buildings with linear fluid viscous dampers (FVDs). The equivalent model consists of a flexural cantilever beam and a shear cantilever beam connected in parallel by a finite number of axially rigid members that allows the consideration of intermediate modes of lateral deformation. The effects of different lateral deformations on the pre-design stage of two high-rise buildings are showed considering four soil types (hard rock, dense soil, stiff soil and soft soil) and three different distribution methods for linear FVDs: uniform-distribution (UD), story-shear-proportional-distribution (SSPD) and story-shear-strain-energy-distribution (SSSED). For UD method, the damping coefficients of FVDs increase as the flexural rigidity of the building decreases; whereas for SSPD and SSSED methods, the damping coefficients of FVDs vary along the height depending on the type of lateral deformation. For the three distribution methods and the same lateral deformation, the damping coefficients of FVDs decrease as the soil flexibility increases, which leads to a significant decrease in controlling earthquake-induced vibrations and wind-induced vibrations in the two high-rise buildings on a soft soil.
机译：提出了等效的两束耦合（CTB）离散模型，以计算具有线性流体粘性阻尼器（FVD）的柔性基础建筑物的时域动态响应。等效模型由挠性悬臂梁和剪力悬臂梁组成，它们通过有限数量的轴向刚性构件并联连接，从而可以考虑横向变形的中间模式。考虑到四种土壤类型（硬岩，致密土，硬土和软土）和线性FVD的三种不同分配方法，均显示了不同横向变形对两座高层建筑的设计阶段的影响：均匀分布（ UD），故事剪力比例分布（SSPD）和故事剪力应变能量分布（SSSED）。对于UD法，FVD的阻尼系数随着建筑物的抗弯刚度的降低而增加;而对于SSPD和SSSED方法，FVD的阻尼系数沿高度的变化取决于侧向变形的类型。对于三种分布方法和相同的横向变形，FVD的阻尼系数随着土壤挠性的增加而减小，这导致在软土地上的两座高层建筑中，控制地震引起的振动和风引起的振动的显着降低泥。

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