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Several Structural Concepts of Reinforcement of High-Rise Buildings
Chen Zhaorong,
Cai Zhili,
Ke Biaozhi,
Zeng Changluo
Issue:
Volume 10, Issue 6, November 2022
Pages:
213-220
Received:
26 September 2022
Accepted:
16 November 2022
Published:
29 November 2022
DOI:
10.11648/j.ajce.20221006.11
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Abstract: This paper puts forward that the appearance of unfinished buildings brings many difficult problems to the development of local urbanization, and explains that it is necessary to accurately evaluate the overall reliability of unfinished buildings and carry out structural reinforcement, in order to ensure the continuation of unfinished buildings, transformation and upgrading of the premise. This paper discusses the structural concept of structural reinforcement of high-rise buildings, the structural design problems caused by inclined column of high-rise building, the vertical deformation of suspension and continuous structure construction of high-rise building, and the mechanical behavior of beam and column under full-span wall of high-rise building transfer floor are discussed. In view of the corresponding problems, this paper proposes that measures should be taken to ensure the reliability of horizontal force transmission of beam-column joints, floor, wall-beam joints and core tubes In addition, a simple method for calculating the moment of inertia conversion of beam-wall section is presented from the angle of beam-wall interaction, the correct method of realizing beam-wall interaction by common software is given, which provides reference for early structural analysis of complex engineering. It is hoped that these measures can solve the problems of unfinished buildings and promote the development of the city.
Abstract: This paper puts forward that the appearance of unfinished buildings brings many difficult problems to the development of local urbanization, and explains that it is necessary to accurately evaluate the overall reliability of unfinished buildings and carry out structural reinforcement, in order to ensure the continuation of unfinished buildings, tra...
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Analysis on the Performance of Government Investment Project Management Based on Value Engineering
Issue:
Volume 10, Issue 6, November 2022
Pages:
221-224
Received:
6 October 2022
Accepted:
16 November 2022
Published:
29 November 2022
DOI:
10.11648/j.ajce.20221006.12
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Abstract: Government-invested projects are characterized by large investment scale, high difficulty in project management, complex stakeholder relationships, high social concern, and the sustainable impact of project products on society. Multiple attributes should be comprehensively considered when evaluating their performance. In order to improve the efficiency of government investment project management and the service efficiency of funds, by building a set of scientific and reasonable, strong applicability management performance evaluation system, to achieve an accurate measure of government investment project management level, and then put forward targeted improvements, is the important way to improve the performance of government project management. According to the characteristics of government investment project management, this paper discusses the compatibility between it and value engineering and puts forward the basic idea of applying value engineering theory to evaluate the performance of government investment project management. The results show that the value engineering management idea and the government investment project management have commonalities in management essence, management purpose, management operation mechanism, management means and management foothold. Thus, it expands the idea and provides a new method for the evaluation of government investment project management performance.
Abstract: Government-invested projects are characterized by large investment scale, high difficulty in project management, complex stakeholder relationships, high social concern, and the sustainable impact of project products on society. Multiple attributes should be comprehensively considered when evaluating their performance. In order to improve the effici...
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Some Aspects of Overturning Mechanisms of Pile Driving Machine on Soft Foundation
Shouji Toma,
Wai Fah Chen
Issue:
Volume 10, Issue 6, November 2022
Pages:
225-232
Received:
24 November 2022
Accepted:
19 December 2022
Published:
28 December 2022
DOI:
10.11648/j.ajce.20221006.13
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Abstract: Many overturning accidents of cranes and pile driving machines have occurred in recent years. Overturning mechanisms of those accidents have been studied by the author, et al., based on theory of structural stability by using the rotational spring-rigid bar model. A summary of the theoretical study is first described in this paper including the concept of the structural stability, the category of the overturning mechanisms and the preliminary model test. Then, using the same structural model, the computer structural analysis, in which software TDAPIII (Time-domain Dynamic Analysis Program in 3-dimension) is used, is explained in order to compare with the previous theoretical study. Consequently, the computer analysis confirms a good coincidence with the theoretical results. Further, by the computer analysis, the effect of the rotational stiffness of the foundation and the eigenvalue analysis to find the critical load are studied. In general, the computer analysis is a more practical tool to study the overturning mechanism than the theoretical analysis which is based on the equilibrium equations. The computer analysis would be possible to consider the material non-linearity of the foundation and 3-dimensional effect. In order to avoid this kind of overturning accident in the future, the results in this paper will give useful information to study further in details.
Abstract: Many overturning accidents of cranes and pile driving machines have occurred in recent years. Overturning mechanisms of those accidents have been studied by the author, et al., based on theory of structural stability by using the rotational spring-rigid bar model. A summary of the theoretical study is first described in this paper including the con...
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