增位型阻尼墙力学模型及跨层减震结构的地震响应分析

提出了一种将增位型黏滞阻尼墙跨层布置的增效耗能减震结构体系。基于能量等效原理，并采用积分的方法建立了增位型阻尼墙的阻尼力和滞回耗能的计算公式，进行了普通黏滞阻尼墙和位移放大3倍的增位型阻尼墙的拟静力试验，在相同的位移幅值和加载频率下，增位型阻尼墙的阻尼力放大4.40倍，耗能平均放大4.41倍。进一步对某30层混凝土框架核心筒结构进行普通阻尼墙与增位型阻尼墙的地震响应对比分析。通过对比分析验证了增位型阻尼墙的减震效果，并且发现增位型阻尼墙跨层布置时的结构附加阻尼比倍数提高，结构响应进一步减小。将增位型阻尼墙跨层布置可取得更优的减震控制效果。

MECHANICAL MODEL OF DISPLACEMENT AMPLIFICATION DAMPING WALL AND SEISMIC RESPONSE ANALYSIS OF CROSS-LAYER DAMPING STRUCTURE

An efficient energy dissipation and shock absorption structural system with displacement amplification damping walls across multi-story is proposed. Based on the principle of energy equivalence, the formulas for calculating the damping force and hysteretic energy dissipation of the displacement amplifier are established by using integral method. The pseudo-static tests of ordinary viscous damping walls and high-efficiency viscous damping walls with 3 times magnification of displacement are carried out. Under the same displacement amplitude and loading frequency, the damping force of large damping wall is enlarged by 4.40 times, and the energy consumption is 4.41 times on average. Furthermore, the seismic response of a 30-story concrete frame core tube is compared with that of a large damping wall. Through comparative analysis, the damping effect of the enlarged wall is verified, and it is found that the additional damping ratio of the structure is increased and the response of the structure is further reduced. The better damping control effect can be obtained by placing a displacement amplification damping wall across multi-story.