1. Reinforcement of components and structural system There is no doubt that when some components do not meet the safety requirements, structural reinforcement must be carried out, but structural system reinforcement is often ignored. For example, the change of stiffness and strength distribution caused by the reinforcement of local members should be considered from the safety of the whole structural system. In addition, the reinforcement of the connection between structural members has a great influence on the integrity of the structure.
2. Local reinforcement and integral reinforcement of buildings When the mechanical properties of the whole structural system are not affected by the reinforcement of local members, local structural reinforcement can be carried out, such as the destruction of local beams and plates caused by equipment explosion. At this time, it is only necessary to reinforce the damaged beams and plates to the original resistance. When the overall structure of the building does not meet the requirements, such as the lateral deformation of the structure under the earthquake, it is appropriate to strengthen the overall structure of the building.
3. The requirements for temporary reinforcement of buildings and permanent reinforcement of structures can be reduced, while the requirements for permanent reinforcement are higher.
4. The following issues should also be considered in the seismic strengthening design: 1) In the seismic strengthening design, the stiffness and strength distribution of the structure should be uniform to avoid new weak layers. 2) In the design of seismic strengthening, the vertical stress component should be continuous to ensure the clear force transmission route. 3) In the seismic strengthening design, the natural vibration characteristics of the strengthened structure change, which leads to the increase of earthquake action. 4) When adding members or strengthening the original members in the seismic strengthening design, the possibility of reducing the torsional effect of the whole structure should be considered. 5) During the seismic strengthening design, strengthen the seismic structure of weak parts. 6) In the seismic strengthening design, the stress state of the structure should be made more reasonable, so as to prevent brittle failure of members and eliminate the stress state of strong beams and weak columns and weak joints of strong members that are not conducive to earthquake resistance. 7) The influence of the construction site should be considered in the seismic strengthening design. According to the specific situation of the construction site, the reinforced structure should choose a structural system with less ground propagation response to avoid the increase of seismic action after reinforcement exceeding the improvement of seismic capacity of the structure. This is because, according to the experience of earthquake damage and the basic theory of seismic analysis, the seismic response of the structure with greater stiffness is greater on the hard site, while that of the structure with less stiffness and greater flexibility is greater on the soft site. Therefore, this concept should be adopted in the seismic strengthening design, and the seismic action of the structure can be changed by adjusting the stiffness of the structure, so as to meet the design requirements. 8) In the seismic strengthening design, new seismic technology is adopted for strengthening. The new and mature seismic strengthening technology can improve the seismic performance of the structure as a whole and improve the seismic capacity of the structure, which should be strongly advocated. The United States and Japan have done a lot of work in this field, and China also has some projects to explore this field. At present, the technologies and measures that can be applied in this respect include: base isolation (including story isolation), adding seismic energy dissipation braces or seismic energy dissipation shear walls, and adopting active control or mixed control technology.
What is the seismic strengthening principle of the above building structures collected by Zhong Da Consulting? For more information about architectural knowledge on "What is the principle of seismic strengthening of building structures", please pay attention to the column of Zhong Da Consulting Industry. "It is easy to win the bid with a little construction." For information about construction enterprises, please visit Zhong Da Consulting, Building Link or follow the official account of Zhong Da Consulting WeChat for information.
For more information about project/service/procurement bidding, and to improve the winning rate, please click on the bottom of official website Customer Service for free consultation:/#/? source=bdzd