Studies On Seismic Identification and Reinforcemen
Studies On Seismic Identification and Reinforcemen
Studies On Seismic Identification and Reinforcemen
http://www.scirp.org/journal/ojce
ISSN Online: 2164-3172
ISSN Print: 2164-3164
Ying Liu
Keywords
Building Structure, Earthquake Proof, Identification, Reinforcement Design
1. Introduction
In recent years, the development of seismic technology and design of building
structures in China is getting more and more rapid. People’s requirements for
building seismic reinforcement are also increasing. At the same time, China’s
seismic design standards are higher and higher. But because of the reality of the
national conditions, many old neighborhoods of the last century are still wide-
spread. Their earthquake resistance and safety are important hidden dangers to
people’s property and safety. Once the earthquake occurs, the former communi-
ty seismic resistance cannot meet the current requirements, so the safety of
people’s lives and property cannot be guaranteed. Therefore, it is necessary to
carry out seismic identification of the old communities, which also meets safety
requirements. The following is the author’s elaboration of the building structure
seismic reinforcement and design, hoping to contribute to the development of
building seismic technology through author’s analysis and demonstration.
according to building structures, and form new design concept and new design
model according to all kinds of experiences obtained in the process of various
earthquake—resistant disasters. The design and construction of this method
avoids complicated numerical calculation, and is also a significant difference
from the traditional seismic design checking calculation. This kind of concrete
seismic design has the following points: 1) The principle that houses do not fall
down during large earthquakes, can be repaired after medium earthquakes and
cannot be shaken by small earthquakes. 2) In the process of design, the replace-
ment of reinforcement should be carried out in strict accordance with the con-
struction procedure. 3) In the process of design and reinforcement, prevention
first and prevention and treatment integration should be given priority to
throughout the design idea. 4) In the process of design, we should understand
the design concept and path of building seismic resistance and have clear design
ideas for building seismic resistance. 5) Make specific analysis of different
buildings and formulate appropriate seismic design and reinforcement plan ac-
cording to the local conditions [2].
The load of the building structure is mainly transmitted through the upper
structure and the lower structure’s direct support. This kind of load transfer
must be affected by the overall building stiffness. In order to ensure the building
in the small earthquake has strong resistance under the role of the structure, and
the stability of buildings under the action of large and medium-sized earth-
quakes, large earthquake buildings must be kept from collapsing. Therefore, we
must choose the scientific and reasonable support mode according to the stiff-
ness and strength, the layout of the support, and ways to balance the internal
stress of the structure reasonably. The support of the building is generated in
this environment. Rubber support (as shown in Figure 1) appeared in the late
1960s. With the improvement of rubber refining technology, the high damping
rubber support has also been improved. In the subsequent process, various kinds
of rubber support styles also emerge endlessly, such as basin rubber support,
lead-zinc rubber support, high damping rubber support and friction rubber
support.
At present, the research on seismic support has been more extensive and
in-depth, from single damping to comprehensive damping technology, and from
single support damping to compound support damping. Support damping
technology has been greatly improved and widely used. It is found that the
lead-zinc rubber bearing is more effective in shock—reducing and anti-seismic
in the past researches and analysis, which has obvious effect on reducing seismic
stiffness of buildings. Therefore, the advantages of lead-zinc rubber support are
more significant in the process of constructing longitudinal seismic system.
First is to judge the actual bearing capacity of the structure. The second is to
narrow the scope of identification in seismic measurement. If the existing build-
ing structure no longer meets the specific criteria for identification, we should
use the reinforcement principle to reinforce it. Current processing identification
standards in China mainly include GB50023-2009 and GB50367-2006.
In addition, there are certain construction requirements. The seismic index of
the existing building structure should be the same or similar with that of the new
building structure. Therefore, the following concepts and principles should be
grasped in the process of actual processing: 1) The principles of seismic rein-
forcement vary. If existing structures need seismic reinforcement, they are safe
and reliable even when they are not required. But if it can’t be put into normal
use, they are not safe when they need reinforcement. This is very different from
the nature of repair and reinforcement. The seismic reinforcement of building
structure mainly includes the poor recovery ability after damage, which needs
reinforcement, the partial restoration of the seismic capability of structure or the
comprehensive reinforcement. 2) The reinforcement target and basis is the con-
clusion of seismic identification. Seismic identification and seismic reinforce-
ment is a continuation of work. 3) Improve comprehensive seismic capability (as
shown in Figure 3). If an existing building or a new building does not meet the
relevant regulations, we can choose to start from the two aspects of bearing ca-
pacity and deformation capacity in order to improve the deformation capacity as
well as its bearing capacity. The damage can only be minimized when different
building defects are addressed, so as to improve its overall seismic capacity. 4)
Improve the performance of reinforcement. The main purpose of building
structure reinforcement is to improve the comprehensive ability of earthquake
resistance and always keep the old and new components connected smoothly. In
the whole process of detection, the degree of collaboration between the old and
new parts is affected. In particular, new injuries should be prevented. 5) Fully
increase the carrying capacity. As the foundation of building structure is in ver-
tical action for a long time, the soil structure is relatively strong. Therefore, the
strong soil structure needs to improve the bearing capacity. When the weight of
the building structure is too much, there is no need to deal with its foundation.
Direct reinforcement is enough. 6) Choose proper reinforcement materials. The
selection of reinforcement materials should be strictly screened. Choose safe
materials with good quality and high reinforcement grade. And before the rein-
forcement construction, the actual size of the building structure needs to be
measured twice. Once the material structure inclines, a set of scientific and rea-
sonable plans should be made to repair it.
structure, it is necessary to improve the rigidity ability of building and its bear-
ing capacity. The main method is to enlarge the cross section of building com-
ponents. For example, Jiujiang old intermediate court reform just added a row of
columns to the original single-span frame and transformed it into a two-span
frame. It improved the bearing capacity and ductility, reduced the height of the
layer. To improve the shear capacity of the components, two methods of con-
nection construction and enveloping steel structure are used. 2) Once obvious
defects are found in the building structure system, we can solve it by the method
of disconnecting or adding structures. In this way, the bearing capacity and de-
formation capacity of the building structure can be improved so that the com-
prehensive seismic capacity of the building structure meets the specified re-
quirements. For example, the renovation of an office building breaks the
L-shaped structure into two regular rectangular structures. The original single
span frame forms frame shear structure by adding concrete shear wall. 3) Ensure
the integrity and safety of building structure by improving the deformation abil-
ity of building structure. 4) In the case of unreasonable building structure, espe-
cially in the case of low seismic capability, we can only protect the local compo-
nents when deal with weak links first. If the stirrup of beam is insufficient, high
strength carbon fiber is usually added. It not only meets the actual requirements
of the overall building structure, but also needs to achieve beautiful effect. 5) For
non-building structures that do not meet the specified standards, it is necessary
to carry out key inspections and rectification of potentially dangerous areas [7].
6. Conclusion
From the above analysis, we can draw the following conclusions: 1) In the
process of building reinforcement design, the feasibility and economy of the
reinforcement plan should be strictly controlled, and the life cycle of the build-
ing should be increased reasonably. 2) When strengthening the main body of the
building structure, a complete and specific construction plan should be formu-
lated according to the actual situation to minimize the disturbance to the foun-
dation. 3) Many methods can be used to reinforce buildings. In the process of
reinforcement, many kinds of composite materials can be used to reinforce walls
to improve the overall seismic level. At the same time, avoid strengthening the
original frame column as much as possible. 4) Consider building structure load
and stiffness changes and other factors comprehensively to avoid uncontrollable
factors in the construction process. 5) Use the new reinforcing technology of
viscose steel and chemical anchor. If sufficient funds are available, seismic re-
search can be carried out and scientific methods such as seismic dissipation
technology should be widely used.
Conflicts of Interest
The author declares no conflicts of interest regarding the publication of this pa-
per.
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