A new semi-active mass damper, included active joint to control Lock/Unlock between the mass of damper and structure, is proposed to avoid “de-tuning effect” in this study. A ten-floor shear building with Tuned Mass Damper (TMD) and Semi-Active Mass Damper (SAMD) under excitation of 26 earthquake records is simulated by numerical analysis to compare the shock absorption effects. Analysis results show that: (1) Shock absorption of roof displacement and root mean square (RMS) roof displacement is 9.9%, 15.8% and 67.9%, 70.9% for structure with TMD and SAMD under excitation of Kobe 1995 earthquake respectively. Shock absorption of roof displacement and RMS roof displacement 52.7%, 62.1% and 55.7%, 66.3% for structure with TMD and SAMD under excitation of Sumatra 2007 earthquake respectively. (2) Structural response of building with SAMD controlled is very low sensitivity to frequency ratio. SAMD control effect is better than that of TMD on near fault earthquakes and suitable for far-field earthquakes. Otherwise, SAMD is almost without “de-tuning effect”. (3) Shock absorption ratio of the roof displacement responses and RMS displacement responses for structure with SAMD under excitation of far-field earthquake is above 38% and 62%, respectively. The frequency ratio of SAMD controlled should be limited to less than 4.0 to avoid enlarging the maximum acceleration responses. The practicability of this proposed SAMD has been verified by numerical analysis.

提出了一种新的半主动质量阻尼器，包括主动关节以控制阻尼器质量与结构之间的锁定/解锁，以避免本研究中的“失谐效应”。通过数值分析，模拟了一个十层剪力建筑物，其中有调谐质量阻尼器（TMD）和半主动质量阻尼器（SAMD）在26条地震记录的激励下进行了模拟分析，以比较减震效果。分析结果表明：（1）在1995年神户地震中，TMD和SAMD结构的顶板位移的减震量分别为9.9％，15.8％和67.9％，70.9％。在Sumatra 2007年地震的激励下，TMD和SAMD结构的顶板位移和RMS顶板位移的减震分别为52.7％，62.1％和55.7％，66.3％。（2）受SAMD控制的建筑物的结构响应对频率比的灵敏度非常低。在近断层地震中，SAMD控制效果优于TMD，适用于远场地震。否则，SAMD几乎没有“失谐效应”。（3）在远场地震的激励下，具有SAMD的结构的屋顶位移响应和RMS位移响应的吸震率分别高于38％和62％。SAMD控制的频率比应限制为小于4.0，以避免扩大最大加速度响应。数值分析验证了该建议的SAMD的实用性。SAMD几乎没有“失谐效应”。（3）在远场地震的激励下，具有SAMD的结构的屋顶位移响应和RMS位移响应的吸震率分别高于38％和62％。SAMD控制的频率比应限制为小于4.0，以避免扩大最大加速度响应。数值分析验证了该建议的SAMD的实用性。SAMD几乎没有“失谐效应”。（3）在远场地震的激励下，具有SAMD的结构的屋顶位移响应和RMS位移响应的吸震率分别高于38％和62％。SAMD控制的频率比应限制为小于4.0，以避免扩大最大加速度响应。数值分析验证了该建议的SAMD的实用性。