专业英语大作业

Study on the Ability of Tolerance of the Long-term Vibration of
Ancient Architecture

With the constant expanding of the present city construction scale, the influence of traffic
vibration and industry vibration on the ancient architecture is inevitable and increasing ,which is a
long-term process and every day for a long time.long-term accumulation, fatigue damage, safety
performance degradation and other aspects of the building can not be ignored even if not enough
has significant effect on buildings in a short period of time.The subject main to study the ability of
ancient architecture to tolerate long-term vibration in which AHP and durability research based on
neural network method are applied to the research on the durability of the ancient buildings.It has
the profound significance to the study of ancient architecture。
Domestic experts and scholars have carried out a lot of research on the historic building fire
prevention, an example is that Beijing Jiaotong University, Tongji University ,etc. were carried
out to study the effects on surrounding buildings which caused by the subway.Study on prediction
of timbered ancient building’s life also gradually rich, such as the application of the knowledge of
BP neural network to the life prediction of timbered ancient buildings.AHP is widely used in
evaluating the durability of the concrete structure, concrete structure durability research based on
neural network is also more and more, such as bridges and frame structure, and have achieved
good results, but these methods are seldom used in ancient architecture.Therefore ,we can use the
hierarchical analysis method and neural network theory for reference to study the ability to
tolerate long-term vibration of ancient buildings.
The method is mainly based on the hierarchical analysis of the layered method principle,
determine the relevant factors, such as component to their own situation, historical situation, the
environmental factors such as long-term vibration which were main consideration: traffic
vibration, mechanical vibration, vibration during construction, then setting up the hierarchy
structure.Secondly, to construct the multiple comparison judgment matrix and test of judgment
matrix so to establish the analysis model of buildings durability evaluation level.Then combining
with the existing data and the literature to determine the evaluation index grade standard and
determine the weight of each index in the evaluation system, so as to get the comprehensive
evaluation index.Durability research based on neural network method is quantitative
characteristics of ancient building durability upper bearing structure as the input of the network,
several grades of the assessment results of durability as output of network. The network is trained
using the training set LVQ data to the design, then the test set data were tested, and the test results
were analyzed, including LVQ neural network implemented by MATLAB.Finally,contrast the
results of two methods.If we can get the expected effect, not only can the long-term anti-vibration
ability of ancient buildings have a more in-depth understanding, provides a new method to the
research on the durability of the ancient architecture, but also provide the basis for the protection
and repair of ancient buildings.