An earthquake causes a huge loss of life and property. After an earthquake, many buildings are seriously damaged or collapsed. On the one hand, it is necessary to make full use of nanomaterials technology to improve seismic strength during reconstruction; on the other hand, scientific planning is needed to reduce pollution, carbon emissions, and energy consumption. This paper mainly studies the application of nanomaterial technology in disaster prevention and reconstruction. Through a series of planning safeguard measures, the overall seismic performance of the city is improved in order to provide theoretical guidance and technical support for disaster prevention and reconstruction. This paper mainly introduces the stress analysis of frame joints after earthquake and the planning of urban disaster prevention and reconstruction. In addition to the different types of concrete materials (ordinary concrete, nano silica fiber concrete, PVA fiber concrete), the fixed amount of water, superplasticizer, reinforcement, sand, and gravel, the concrete strength grade is C30. Then, three kinds of concrete frame joints are tested under low cycle cyclic loading to compare the seismic performance of the three kinds of concrete. The experimental results show that the fuzzy evaluation of urban disaster prevention and reconstruction planning has been carried out for 6 communities in this city. Among them, 4 communities are qualified and 2 communities are unqualified. Therefore, it is necessary to focus on seismic reinforcement or carry out urban planning research again. Compared with ordinary concrete, the bearing capacity and ductility coefficient of nano silica fiber concrete and PVA fiber concrete are increased by 37.8% and 15.6%, respectively. It is proved that the seismic performance of nano silica fiber reinforced concrete is far better than that of ordinary concrete.

中文翻译：

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纳米材料技术在防灾重建中的应用规划研究

地震会造成巨大的生命财产损失。地震发生后，许多建筑物严重受损或倒塌。一方面，要在重建过程中充分利用纳米材料技术提高抗震强度；另一方面，需要科学规划，减少污染、碳排放和能源消耗。本文主要研究纳米材料技术在防灾重建中的应用。通过一系列规划保障措施，提升城市整体抗震性能，为防灾重建提供理论指导和技术支持。本文主要介绍地震后框架节点受力分析及城市防灾重建规划。除混凝土材料种类不同（普通混凝土、纳米二氧化硅纤维混凝土、PVA纤维混凝土）、水、减水剂、钢筋、砂、砾石等定量外，混凝土强度等级为C30。然后，在低周循环荷载作用下对三种混凝土框架节点进行试验，比较三种混凝土的抗震性能。实验结果表明，对该市6个社区进行了城市防灾重建规划模糊评价。其中，合格4个社区，不合格2个社区。因此，有必要以抗震加固为重点或重新进行城市规划研究。与普通混凝土相比，纳米二氧化硅纤维混凝土和PVA纤维混凝土的承载力和延性系数分别提高了37.8%和15.6%。实践证明，纳米二氧化硅纤维混凝土的抗震性能远优于普通混凝土。