摘要：Behavior of structural elements under blast loading is different from that under usual loading conditions that are considered in conventional structural deigns. Cantilever slabs are more vulnerable than most other elements under blast loads because of their shape. Understanding the blast behavior of cantilever slabs is useful in strengthening them against blast loads. In this paper, blast loading design envelopes for cantilever slabs are proposed using which, the blast behavior of conventional cantilever slabs can be identified. The paper describes the theories behind these envelopes and the way they can be applied to improve conventional designs. These envelopes have been prepared using numerical techniques. The theories used are accepted, verified and validated theories. The paper shows the possibility of converting a conventional cantilever slab design into impulsive regime design with minor adjustments to the structural design. It points out the importance of increasing slab thickness and controlling steel/concrete ratio for strengthening conventional cantilever slab designs and the requirement of reinforcement at top and bottom fibers.

摘要：世界主要4个茶叶生产国中,唯独中国没有建立出口拍卖市场。茶叶拍卖交易需要相对集中的市场结构,然而,茶园小规模经营是世界普遍的生产方式。针对茶叶小生产与拍卖大宗交易的矛盾,各个国家采取不同的制度设计,斯里兰卡的纵向契约分成制和日本的横向合作组织具有代表性。中国绿茶国际垄断性是建立出口拍卖市场的产业基础,但有效实施拍卖交易仍需要制度环境的重构。