Viscoelastic damper design method for three adjacent building structures
A technology for building structures and dampers, applied in building components, buildings, building types, etc., can solve problems such as lack of versatility and cumbersome design methods for dampers.
Pending Publication Date: 2022-05-06
SHANDONG UNIV OF SCI & TECH
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[0005] The invention provides a viscoelastic damper design method for three adjacent building structures, which solves the problems that the existing damper design method is cumbersome and does not have universality, so that the viscoelastic damper is connected between the three adjacent structures to realize the structure Shock-absorbing design is convenient and quick
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[0063] A certain three adjacent building structures, the left building structure A has 20 floors in total, and the stiffness between each layer is 2.2×10 6 kN / m, the mass of the floor is 1500t; the building structure B in the middle part has 17 floors, and the stiffness of each floor is 2.8×10 6 kN / m, the floor mass is 1500t; the building structure C on the right has 15 floors, and the floor mass is 1000t. It is proposed to use the method of connecting linear viscoelastic dampers to control the seismic response of the middle structure B to optimize the shock absorption effect.
[0064] Through modal analysis, the basic natural frequencies of the three adjacent building structures are 0.4669Hz, 0.6170Hz, and 0.8061Hz respectively; the equivalent total mass of the three structures is 2.55×10 4 t, 2.17×10 4 t and 1.28×10 4 t.
[0065] Therefore, the frequency ratio among the three structures is ω 2 / ω 1 = 1.321, ω 3 / ω 2 =1.306, mass ratio is M 2 / M 1 =0.850, M 3 / M 2...
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The invention discloses a design method of a viscoelastic damper for shock absorption of three adjacent building structures, belongs to a design method of a damper used for shock absorption of the building structures, and solves the problems that an existing design method of connecting the damper between the structures is tedious and does not have universality. The method comprises the following steps: (1) determining dynamic characteristic parameters and mutual relations of three adjacent structures; (2) determining the combined working condition of the three adjacent structures; (3) determining a damping control target during earthquake action; and (4) determining the rigidity coefficient of the viscoelastic hysteresis damper connected between the structures and calculating a damping system. The method is convenient and fast, the optimal rigidity coefficient and damping coefficient of the viscoelastic damper can be searched by adopting a general data table only by utilizing the combined working condition, mass ratio and first-order natural vibration frequency ratio of three adjacent building structures, engineers can be conveniently helped to select parameter values of the damper, and the method is suitable for large-scale popularization and application. Therefore, the damper meeting the requirements is manufactured or selected according to the parameters, and the method has important significance in application and popularization of vibration control systems of adjacent building structures.
Description
Technical field: [0001] The invention belongs to a damper design method used for shock absorption of building structures. Background technique: [0002] Due to the dense urban population and continuous shortage of land, the distance between buildings may be too small, and collisions between buildings may occur when strong earthquakes occur. Some buildings are equipped with deformation joints, such as between the main high-rise building and the podium, and collisions may also occur during strong earthquakes. Earthquake damage surveys show that buildings collided with each other during previous major earthquakes. For example, in the 1985 Mexico City earthquake, more than 40% of the 330 buildings that were seriously damaged or collapsed occurred. 15% of the total collapsed. Collisions between adjacent structures were observed in the 1977 Romania earthquake, the 1994 Northridge earthquake, the 1999 Turkey earthquake, and the 2008 Wenchuan earthquake. In order to avoid mutual ...
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IPC IPC(8): G06F30/13G06F30/17G06F111/06
CPCG06F30/13G06F30/17E04B1/98E04H9/021G06F2111/06
Inventor 孙黄胜申孟杰王继伟
Owner SHANDONG UNIV OF SCI & TECH