Symposium on Bridge Strengthening and Rehabilitation II

9422226克莱伯美国大约600,000座公路桥中约有一半是在1940年之前建造的，许多都没有得到充分的维护。环境因素造成的环境恶化加剧了这个问题。根据FHWA的数据，全国40%的桥梁被归类为有缺陷的，需要修复或更换。在许多情况下，加强已被确定为一种具有成本效益的替代办法。许多研究机构、大学和咨询机构开发了各种有效的桥梁修复和加固程序。为了提供一个论坛来传播实践桥梁工程师的“久经考验”的修复和加固程序，NSF于1993年4月在爱荷华州得梅因举办了一次研讨会。有必要举行第二次桥梁加固/修复专题讨论会，因为仍然存在主要的桥梁问题，而且在过去两年中已经完成了大量的设计和研究。因此，在对所有感兴趣的工程师开放的第二次专题讨论会之后，将举办一次应邀与会者讲习班，根据在两次专题讨论会上所作的介绍，编写一份关于桥梁加固和修复的手册。最后的手册将由研讨会指导委员会编写，并向公共和私人执业的设计师提供。***

9422226 Klaiber About one-half of the approximately 600,000 highway bridges in the United States were built before 1940 and many have not been adequately maintained. Deterioration caused by environmental factors has added to the problem. According to the FHWA, 40% of the nation's bridges are classified as deficient and in need of rehabilitation or replacement. In lieu of replacement in numerous instances strengthening has been determined to be a cost- effective alternative. Many researchers institutes, university, and consulting offices have developed various efficient bridge rehabilitation and strengthening procedures. To provide a forum for disseminating "tried and true" rehabilitation and strengthening procedures practicing bridge engineers, an NSF- sponsored symposium was held in Des Moines, Iowa in April 1993. There is need for a second bridge strengthening/rehabilitation symposium in that there are still major bridge problems and a considerable amount of design and research has been completed within the last two years. Therefore, a second symposium, open to all interested engineers, will be followed by a workshop of invited participants to formulate a manual on bridge strengthening and rehabilitation based on the presentations at both symposiums. The final manual will be prepared by the symposium steering committee and made available to designers in both public and private practice. ***