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在汶川大地震中,教育系统内师生伤亡极为惨重.校园建筑的建设质量和防震标准成为社会各界关注的焦点.由此,本文探讨了环太平洋地震带上的美国加州和中国台湾关于校园建筑防震标准的法律规定及其具体细则,并且梳理了大陆中小学建筑防震的政策法规,最后提出了完善大陆中小学校建筑防震标准的建构原则及方法. 相似文献
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日本是地震高发国家,每年发生的地震多达数千次,其中,震级超过3级的地震平均每天就有4次,世界每年所发生的里氏6级以上的地震有近20%发生在日本。作为地震的高发国,日本并非受灾最严重的国家,而是在长期的抗震 相似文献
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我设计的"超世纪房屋"是用新世纪混凝土做成的框架,再装上可防震防弹、超薄透明,还能根据主人的喜好自动调节明暗的玻璃。当屋外烈日炎炎时,超世纪房屋会吸收炙热的光线,释放出 相似文献
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We investigated the behaviors of an active control system of two-stage vibration isolation with the actuator installed in parallel with either the upper passive mount or the lower passive isolation mount. We revealed the relationships between the active control force of the actuator and the parameters of the passive isolators by studying the dynamics of two-stage active vibration isolation for the actuator at the foregoing two positions in turn. With the actuator installed beside the upper mount, a small active force can achieve a very good isolating effect when the frequency of the stimulating force is much larger than the natural frequency of the upper mount; a larger active force is required in the low-frequency domain; and the active force equals the stimulating force when the upper mount works within the resonance region, suggesting an approach to reducing wobble and ensuring desirable installation accuracy by increasing the upper-mount stiffness. In either the low or the high frequency region far away from the resonance region, the active force is smaller when the actuator is beside the lower mount than beside the upper mount. 相似文献
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