SGER: Surface Blast Effects on Embankments and Dikes

CMS-0226864 PI：托马斯齐米机构：伦斯勒理工学院标题：“表面爆炸对堤坝和堤防的影响“摘要：这项研究主要涉及表面爆炸对堤坝，堤防和堤坝的影响。 这些岩土工程类型的结构用于多种目的，其中一个重要的用途是防洪和控制。 该国有数百英里长的防洪堤坝，这项研究特别涉及对这种结构在地面爆炸（典型的恐怖主义情景）中的破坏评估，以及为安全目的利用和改进这种结构。防洪堤和防洪堤最关键的时候是在洪水条件下。 与许多其他自然灾害不同，洪水经常发生，在任何一年，几乎可以肯定该国某些地区会发生洪水。 洪水期间堤坝的破坏可能会造成大量财产损失，甚至生命损失;特别是在大都市地区，如新奥尔良。 不幸的是，在洪水条件下，用炸药破坏堤坝也是最容易的。 将利用RPI的100克吨土工离心机对小比例物理模型进行测试。 作为研究地震动问题的一种实验方法，冲击波模拟是非常有吸引力的，并且已经进行了许多这样的研究。 以前的大多数研究都是在平地、干燥土壤条件下和/或使用嵌入式炸药进行的，也就是说，不是在表面爆炸。将使用50-100个重力范围进行重力实验。 炸药的重量从毫克到一克不等，将使用爆炸桥线引爆。 在100重力离心实验中，一克炸药相当于几吨实际炸药。

CMS-0226864PI: Thomas ZimmieInstitution: Rensselaer Polytechnic InstituteTitle: "Surface Blast Effects on Embankments and Dikes"Abstract: This research deals primarily with surface blast effects on embankments, dikes and levees. These geotechnical engineered type structures are used for many purposes, and an important use is for flood protection and control. Hundreds of miles of embankments and levees exist for flood control in the country.The research is specifically related to damage assessment of such structures from surface blasts (the typical terrorist scenario), and the utilization and improvement of such structures for security purposes. The most critical time for embankments and levees is during flood conditions. Unlike many other natural disasters, floods occur routinely, and in any given year it is virtually certain flooding will occur in some parts of the country. The breaching of a levee during a flood could cause large amounts of property damage and even loss of lives; especially near large metropolitan areas, e.g. New Orleans. Unfortunately, it is also easiest to breach an embankment or levee with explosives during flood conditions. Small scale physical models will be tested, utilizing RPI's 100 g-ton geotechnical centrifuge. Centrifuge modeling is extremely attractive as an experimental approach to the study of ground shock problems, and many such studies have been conducted. Most of the previous research has been conducted on level ground, dry soil conditions and/or with embedded explosives - that is, not surface blasts. Centrifuge experiments will be conducted using a range of 50-100 gravities. The explosive charges will vary in weight from milligrams to one gram, and will be detonated using exploding bridge wires. A one gram charge in a 100-gravity centrifuge experiment is equivalent to several tons of actual explosives.