土建专业外文翻译---预应力混凝土结构的抗震加固方案与局部影响(编辑修改稿)

土建专业外文翻译---预应力混凝土结构的抗震加固方案与局部影响(编辑修改稿)内容摘要：

ervention is a rather plex procedure, because many factors of different nature e into play. A decision has to be taken on the level of intervention. Some mon strategies are the restriction or change of use of the building, partial demolition and/or mass addition, methods such as base isolation, provision of supplemental damping and incorporation of passive and active vibration control devices may apply. The alternatives of ‘no intervention’ or ‘demolition’ are more likely the outes of the evaluation if the seismic retrofit of buildings is quite expensive and disruptive. Socioeconomic issues have to be considered in the decision of the level and type of intervention. Surprisingly, there are documented cases where aesthetic and psychological issues dictate the rehabilitation strategies. For example, in the Mexico City earthqua ke of 19 September 1985, where external bracing was popular, because it instilled a feeling of confidence in the occupants that significant and visible changes have been made to the structure to make it safer. Cost vs importance of the structure is a significant factor, especially in the case that the building is of cultural and/or historical interest. The available workmanship and the level of quality control define the feasibility of the proposed intervention approach. The duration of work/disruption of use and the disruption to occupants should also be considered. The functionality and aesthetical patibility of the intervention scheme with the existing building is an additional engagement. Even the reversibility of the scheme in case it is not accepted on a longterm basis should be taken into account. From a technical point of view the selection of the type and level of intervention have to be based on patibilit。