近来世界许多地方发生的灾难都在警告我们:在可以预见的将来,人们很可能被困于建筑物和其他结构之下。技术先进和“不断发展”的社会有一个重要特点,即:不断增大这种灾难发生的可能性。目前的建筑发展趋势和人口增加速度似乎在继续增大这种风险,因为人们正在从地面向更高处搬迁 Recent disasters in many parts of the world have warned us that people are likely to be trapped in buildings and other structures for the foreseeable future. An important feature of a technologically advanced and “ever-growing” society is the growing possibility of such a disaster. The current trends in building development and population growth appear to continue to increase this risk as people are moving from ground level to higher levels