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Liu Y.-M.,Shanghai Jianke Engineering Consulting Co. | Fu D.,China First Metallurgical Group Co. | Tong Z.-X.,Shanghai Jianke Engineering Consulting Co. | Bao Z.-Q.,Shanghai Jianke Engineering Consulting Co. | Tang B.,Wuhan University of Science and Technology
Civil Engineering and Urban Planning IV - Proceedings of the 4th International Conference on Civil Engineering and Urban Planning, CEUP 2015 | Year: 2016

Based on the nonlinear finite element software ABAQUS, we obtained the curves for the relationship between the pile tip resistance and pile top load with different pile lengths and pile diameters, and also the changes in pile side friction along the depth, by using the Duncan-Chang model to simulate the structured clay of the Zhanjiang group. This analysis indicates that within a certain range, the lateral friction resistance and tip resistance of short thin piles, under the same vertical load, plays a greater role than that of long thick piles. © 2016 Taylor & Francis Group, London.

Zhang C.M.,Inner Mongolia University of Science and Technology | Liang L.J.,Shanghai jianke Engineering Consulting Co. | Huang C.,Inner Mongolia University of Science and Technology
Applied Mechanics and Materials | Year: 2014

It is the initial problem to choose a reasonable layer-adding project in the layer-adding design for buildings. This paper is to prove, through living example, that choosing the truss structure between layers possesses well economical efficiency, and features space saving, ease of construction and good function of anti-earthquake at seismic regions. © (2014) Trans Tech Publications, Switzerland.

Zhang C.M.,Inner Mongolia University of Science and Technology | Liang L.J.,Shanghai jianke Engineering Consulting Co. | Huang C.,Inner Mongolia University of Science and Technology
Applied Mechanics and Materials | Year: 2014

Soft soil's properties including low bearing capacity and large deformation leads to the necessity of reinforcement of foundation when it is made of soft soil. This article illustrates the features and applications of different methods, through the comparison of them. © (2014) Trans Tech Publications, Switzerland.

Bao X.K.,Inner Mongolia University of Science and Technology | Liang L.J.,Shanghai Jianke Engineering Consulting Co
Applied Mechanics and Materials | Year: 2014

Combined with the city of Baotou Arden Street underground passage pipe jacking engineering, using three-dimensional finite element software ANSYS to simulate the process of rectangular pipe jacking construction, this paper will emphasis on the influence of soil displacement around the construction site of the rectangular pipe jacking construction under dynamic loads. Through research, it got the rectangular pipe jacking construction sphere of influence of soil disturbance, and the variation in both horizontal and vertical direction, and compared with the measured data, proved that the numerical simulation has important guiding significance to the pipe jacking construction, will provide a reference for the future construction of similar projects. © (2014) Trans Tech Publications, Switzerland.

Ren X.,Tongji University | Zeng S.,Shanghai Jianke Engineering Consulting Co. | Li J.,Tongji University
Computational Mechanics | Year: 2014

In this work, a rate-dependent model for the simulation of quasi-brittle materials experiencing damage and randomness is proposed. The bi-scalar plastic damage model is developed as the theoretical framework with the damage and the plasticity opening for further developments. The governing physical reason of the material rate-dependency under relatively low strain rates, which is defined as the Strain Delay Effect, is modeled by a differential system. Then the description of damage is established by further implementing the rate-dependent differential system into the random damage evolution. To reproduce the evolution of plasticity under a variety of stress conditions, a multi-variable phenomenological plastic model is proposed and the description of plasticity is then formulated. An explicit integration algorithm is developed to implement the proposed model in the structural simulation. The model results are validated by a series of numerical tests that cover a wide variety of stress conditions and loading rates. The proposed model and algorithm offer a package solution for the nonlinear dynamic structural simulations. © 2014, Springer-Verlag Berlin Heidelberg.

Zhou H.,Shanghai Jianke Engineering Consulting Co. | Huang Y.,Shanghai Jianke Engineering Consulting Co.
Tumu Gongcheng Xuebao/China Civil Engineering Journal | Year: 2014

Due to complex structure change in the process of the long-term construction period, high-rise buildings may be in great risk of structure safety and large equipment safety in the extreme typhoon condition. The major security risk factors of construction are illustrated and reasonable determinations of the typhoon levels (wind load) are pointed out as primary task of the risk management and control. Given that the current relevant national standard have no regulations about the construction process of safety risk value and wind load, the statistical analysis of the typhoon data of Shanghai in recent ten years and the in-site wind speed monitoring data of Shanghai Tower are analyzed. Wind load once every 10 years wind load (10 wind, basic wind pressure is 0.4 kPa) is used to conduct safety risk analysis and compared with corresponding wind load in specifications. The results show that the proposed wind load value is reasonable and reliable. Taking Shanghai Tower project as a case, the simulation analysis of the construction structure safety risks were carried out, in which large tower crane in different construction stages and core tube steel platform were considered. The analysis results indicate that the core tube structure in the construction (8 area) is most dangerous. The corresponding reinforcement measures are put forward, and the structure safety after reinforcement is evaluated. It is shown that after strengthened core tube, the deformation and stress of the core tube can meet the requirements of safety and reliability. The in construction risk management of tower crane is studied. The large tower crane can be divided into blue, yellow, orange, red, black five level risks according to the typhoon level. Corresponding solutions of risk response are put forward for the different risk levels to guide the construction management of the in-site large tower crane. The main structure (580 m) has experienced 2012 super typhoon (sea anemone), in which no structure safety and tower crane safety accidents happen. The project is finished safely, which show that the proposed risk analysis and control measures are reasonable and reliable. The construction safety risk of 500 m high high-rise building and tower crane safety is studied for the first time. The research results can provide reference for construction safety risk management of similar projects.

Zhu D.-H.,Shanghai Jianke Engineering Consulting Co. | Zhang Q.,Shanghai Jianke Engineering Consulting Co.
Hydraulic Engineering III - Proceedings of the 3rd Technical Conference on Hydraulic Engineering, CHE 2014 | Year: 2015

According to relevant documents and payment in the form of questionnaires, 224 cases of the domestic excavation accident in past two decades are collected in this paper. Based on processing and analysis of accident cases, the common risk events and factors are determined in the construction of deep excavation. Meanwhile the relativity between risk of quality and risk of safety and risk of investment is analyzed according to causes and losses of the accident, and the graph of macroscopic logical relation established between the risk of three objective dimension, which provides a reference for comprehensive risk management excavation construction process and baseline data for the theoretical analysis of risk. © 2015 Taylor & Francis Group, London, UK.

Zhang Q.,Shanghai Jianke Engineering Consulting Co.
Hydraulic Engineering III - Proceedings of the 3rd Technical Conference on Hydraulic Engineering, CHE 2014 | Year: 2015

The boom of large-scale complex projects over the world leads the risk management more and more imperative, which achieves good economic and social benefits. The risks of safety, quality, progress and investment of the large complex project construction were discussed, and a large complex project performance evaluation model of risk control was established, which can accomplish the fuzzy evaluation of risk control performance. This method makes the project managers to control the risk of project construction quantitatively and qualitatively. © 2015 Taylor & Francis Group, London, UK.

Pu R.,Shanghai Jianke Engineering Consulting Co | Zhou H.,Shanghai Jianke Engineering Consulting Co
Vulnerability, Uncertainty, and Risk: Quantification, Mitigation, and Management - Proceedings of the 2nd International Conference on Vulnerability and Risk Analysis and Management, ICVRAM 2014 and the 6th International Symposium on Uncertainty Modeling and Analysis, ISUMA 2014 | Year: 2014

In the special background of social transformation and fast urbanization in China, as a new work, social stability risks assessment of major construction projects has been carried out in recent years. Currently, the research about social risks and social impact assessment has been more mature, but the monographic study of social stability risk assessment in major construction projects has been weak. First, combing the research methods of sociology and the characteristics of engineering objective impact, this article explored some investigation methods of social stability risks for collecting the data needed in risks analysis. Then, the project's social stability risk can be identified in general by summarizing and analyzing. Second, this article adopted the single factor risk degree method and overall risk index method to calculate the overall risk index of the major construction projects and to work out the major construction projects' social stability risk level by contrasting project's integrated risk judging reference standard. Third, on the basis of the major projects' participants' and project phases' characteristics, this paper designed an organization model of risk assessment and management and defined responsibilities of all participating units, which can provide guidance to effectively prevent and manage the social stability risks in major construction projects. © 2014 American Society of Civil Engineers.

Zhou H.-B.,Shanghai Jianke Engineering Consulting Co. | Zhang H.,Shanghai Jianke Engineering Consulting Co.
Journal of Construction Engineering and Management | Year: 2011

Risk assessment and risk management for deep foundation pit engineering are essential for quality and safety in civil engineering owing to the needs of urban construction projects. However, uncertainty and fuzziness continue to challenge studies of the probability and consequences of risks in this area. Therefore, a fuzzy comprehensive evaluation method based on Bayesian networks (BNs) is proposed to assess the risks of deep foundation pit construction. This methodology has five main parts: modeling of BNs, determination of occurrence probabilities of risk events, assessment of consequences, calculations of risk value and membership degree of risk rating, and definitions of risk acceptance criteria. In a case study, primary data analysis of a simple accident database from a deep foundation pit construction project in Shanghai is used to provide the probabilities of basic events and approximate distributions of risk consequences. The probability of every risk event is calculated by using deductive BN techniques. Then the consequence of each event is calculated by using fuzzy analysis (i.e., statistical consequence distributions and weight coefficients of risk events are determined through the database). A fuzzy comprehensive evaluation model with a membership function is also presented, and each risk event in the deep foundation pit construction his rated. In addition, risk precautions and control measures are suggested on the basis of the risk assessment results and are applied to risk management in deep foundation pit construction. © 2011 American Society of Civil Engineers.

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