金属结构裂纹维修的矩阵表达方法

对广泛存在于起重机等机械的金属结构中的裂纹进行有效的维修是恢复其承载能力的手段之一。在工程实际中 ,维修裂纹的方法各有不同 ,比较和评价不同维修方法的效果有很大的工程实用价值。鉴于此 ,有必要提出一种对裂纹维修的矩阵表达方法 。

门座起重机金属结构裂纹诊断及维修研究

裂纹是门座起重机最常见的故障,裂纹的存在给安全生产带来很大的隐患。文中以门座起重机人字架上的裂纹为例,结合ANSYS有限元软件和断裂力学理论对裂纹进行诊断及维修研究,研究结果可为裂纹的巡检与修复提供依据。该分析方法适用于门座起重机其它部件上的裂纹分析。

机械承载结构裂纹修复方法及效果的实验比较

薄壁箱型构件是机械承载结构中普遍采用的结构形式，构件在使用过程中经常会产生裂纹． 在实际生产中，为避免裂纹引起灾难性事故，必须对裂纹进行修复．修复的方法有几种，文中就构 件上裂纹的几种维修方法的维修效果进行了实验比较，其实验结果对实际修复方法具有重要的参 考价值．

Introduction of a JCl Guideline： Practical Guideline for Investigation, Repair and Strengthening of Cracked Concrete Structures

There are many cracked concrete structures, although there have been numerous efforts to eliminate cracks. Some cracks are very harmful and should be repaired as soon as possible. On the other hand, the other cracks are almost harmless. So, a good guideline about how to deal with cracks in concrete structures had been needed. JCI （Japan Concrete Institute） published the first version of ＂Practical Guideline for Investigation and Repair of Cracked Concrete Structures＂ in 1980, the second version in 1987, the third version in 2003, and then the fourth version titled ＂Practical Guideline for Investigation, Repair and Strengthening of Cracked Concrete Structures-2009＂ was published. This Guideline is very practical, when cracks are observed in existed concrete structures, in any other countries as well as in Japan.