Seismic Vulnerability of Building Construction Site

Building construction site plays an important role in the economic aspect of a region. So any disruption due to hazard event like earthquake can cause several direct and indirect damages. Direct damages can lead to the loss of equipments and qualified persons. Indirect damages can lead to inflation and loss of purchasing power. To deal with that situation, parameters that govern the vulnerability of building construction site have been identified. Using a MCDM （multiple criteria decision making） method, the priority order of these parameters has been set. Then a PVI （partial vulnerability index） and a GVI （global vulnerability index） are proposed. These indexes allow the classification of building construction sites according to their intrinsic vulnerability and seismic vulnerability respectively that is through the use of a given classification. Several Algerian building construction sites belonging to different seismic zones were considered in order to show the applicability of the method.

“磨课”的魅力

笔者认为，“磨课”对于教师追求高效课堂很有帮助。本文以《政治生活》第一单元第二课第二框“民主决策：作出最佳选择”为例，谈谈自己的体会。在第一次教学时，我采用书上材料导入新课，引出民主决策，再引导学生分析参与民主决策的两种方式：间接决策和直接决策。介绍直接决策的四种方式时，采用了四则材料，分别是：南京政府工作报告征求意见，广东如何收集垃圾，合肥市拆迁方案以及上海市人大立法听证会，最后分析民主决策的意义。我感觉整个教学过程使用的材料内容比较繁杂，有的和学生生活较远，没有贴近学生的生活，在分析材料的过程中教学主体没有由教师转向学生，课堂太过沉闷，自己讲的过多，学生自主发挥太少。