China Shipbuilding NRDI Engineering Co.

Shanghai, China

China Shipbuilding NRDI Engineering Co.

Shanghai, China
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Hu K.,China Shipbuilding NRDI Engineering Co. | Hu K.,Tongji University | Qu G.,China Shipbuilding NRDI Engineering Co. | Zhou J.-R.,China Construction Design International | Zhang L.,China Shipbuilding NRDI Engineering Co.
Gongcheng Lixue/Engineering Mechanics | Year: 2013

The most common analysis method of complex highrise buildings is the response spectrum analysis, elastic time history analysis, pushover analysis and etc. For the analysis of those highrise buildings whose height is higher than 200 meters, their natural periods are longer than 4 seconds, the dynamic nonlinear analysis would be more accurate. In this paper, the dynamic nonlinear analysis was executed by using the Perform-3D program. Through the analysis, the structural dynamic response and plastic stages due to a rare earthquake were obtained, which also satisfied the seismic performance objectives of Chinese design code.


Hu K.,China Shipbuilding NRDI Engineering Co.
Advanced Materials Research | Year: 2014

According to the theory of collapse numerical simulation, the explicit finite element algorithm based on explicit dynamics was chose as the numerical calculation method. And combined with the plane RC frame collapse test and the example of ten layers frame structure, the wire frame model, integrated model and separate model were established and the alternate path method was adopted to study the simulate method of structural collapse. With the comparison of several aspects to the results, the rationality of the numerical simulation method and the applicability of the numerical models were verified respectively. At the same time, according to the complex pre-treatment process to the numerical simulation of structural collapse, an MFC program with the function of exporting APDL file which can generate wireframe models for structural collapse simulation in ANSYS/LS-DYNA was developed using VC++ language with the purpose of offering convenience to the numerical simulation process of structure collapse. © (2014) Trans Tech Publications, Switzerland.


Hu K.,China Shipbuilding NRDI Engineering Co. | Jiang L.,China Shipbuilding NRDI Engineering Co. | Qu G.,China Shipbuilding NRDI Engineering Co. | Lu Z.,Tongji University | Lu X.,Tongji University
Jianzhu Jiegou Xuebao/Journal of Building Structures | Year: 2014

Based on explicit dynamic finite element method and alternate path method, collapse mechanism of several structural forms such as RC plane frame, space high-rise frame structure and high-rise frame-core tube structure were studied according to the collapse numerical simulation analysis. And with detailed comparison and analysis of several aspects, collapse mechanisms of these three structural systems were respectively analysed. The horizontal members of single frame structure would change into 'catenary action' during the collapse caused by static loads. The space high-rise frame structure has the same reaction to the single frame structure while the damage range and deformation situation are different due to the action of slab. The frame-core tube structure is same as the space high-rise frame structure by stcotic loads. While under dynamic loading, 'catenary action' would not happen during the collapse. Besides, large-scale static load test and shaking-table test of the high-rise RC frame-core tube structure were conducted to testify the accuracy and reliability of the numerical simulation methods, and the failure sequence of the members, which verified the collapse mechanisms of RC frame-core tube structure combined with the numerical results. In addition, applicability study of numerical models as wire frame models, integrate models and separate models in collapse simulation was conducted. ©, 2014, Science Press. All right reserved.


Hu K.,China Shipbuilding NRDI Engineering Company Ltd
Gongcheng Lixue/Engineering Mechanics | Year: 2014

With the adoption of new materials as well as structural systems and construction methods, there are appearing more flexible, lighter, greater span and less damping structures, causing the significant vibrational responses of structural floor systems under pedestrian movement loads, which may induce the human discomfort and panic, and even affect the normal utilization of the structures. In this paper, the pedestrian comfort analysis theory and evaluation standards were illustrated firstly by the principle of domestic and foreign research status quo and specification provisions. Furthermore, according to the requirements of national specification and international ISO standard, the time history analysis of an outdoor landscape flyover was done, to elaborate the analysis and evaluation method of the floor pedestrian comfort. Also, the common damping measures of the vertical vibration comfort of the structure floors were introduced.


Hu K.,China Shipbuilding NRDI Engineering Co. | Hu K.,Tongji University | Qu G.,China Shipbuilding NRDI Engineering Co.
Advanced Materials Research | Year: 2012

The most common analysis methods of complex high-rise buildings are the response spectrum analysis, elastic time history analysis, pushover analysis and etc. Meanwhile, for the analysis of those high-rises whose height is higher than 200 meters, period is longer than 4 seconds, the dynamic nonlinear analysis would be more accurate. In this paper, the dynamic nonlinear analysis was executed in use of the Perform-3D program. The results show that the maximum top displacement can meet the national codes; most tie beams and the frame beams of the upper structure yielded in the IO~IS stage and parts reached the CP stage; both the laminated columns and the frame columns had a good performance on the shear behavior; and it is also proposed to strengthen the reinforcement at the reducted storeys. By all these above, it can be judged that the structure reached the codes' seismic performance objectives © (2012) Trans Tech Publications, Switzerland.


Jiang L.,China Shipbuilding NRDI Engineering Co. | Hu K.,China Shipbuilding NRDI Engineering Co.
2015 5th International Conference on Information Science and Technology, ICIST 2015 | Year: 2015

According to the pre-treatment process to the numerical simulation of structural progressing collapse, a program is developed based on the explicit finite element method by using VC++ language and APDL statement which is unique to ANSYS. This MFC program can export structural collapse analysis APDL text of ANSYS/LS-DYNA, which can liberate the analyst from the complex pre-processing. The numerical simulation is conducted and the result of pre-treatment program wireframe model is similar to the GUI wireframe model which proves that the pre-treatment program can be a good alternative to ANSYS GUI to build a wireframe model of frame structure, and the middle column force-unloading displacement curve of numerical simulation has similar trend with the experiment curve which demonstrates the practicability and reliability of the pre-treatment program. © 2015 IEEE.


Hu K.,China Shipbuilding NRDI Engineering Co. | Hu K.,Tongji University | Yang Y.,China Shipbuilding NRDI Engineering Co. | Mu S.,China Shipbuilding NRDI Engineering Co. | Qu G.,China Shipbuilding NRDI Engineering Co.
Procedia Engineering | Year: 2012

Facing a large number of new-type complex structural system and progressively consummate earthquake-resistant theories, the conventional software can no longer meet the needs of calculation and analysis. Meanwhile, some international finite element programs, such as ETABS, SAP2000, MIDAS/gen and SATWE, were updating themselves but remained respective limitations. In this paper, response spectrum, time history and linking slab in-plan stresses analysis were executed combined with a practical project by these programs, which were also compared following the analysis results. © 2011 Published by Elsevier Ltd.


Hu K.,China Shipbuilding NRDI Engineering Co. | Li Q.,China Shipbuilding NRDI Engineering Co. | Chen Y.,China Shipbuilding NRDI Engineering Co. | Qu G.,China Shipbuilding NRDI Engineering Co.
Jianzhu Jiegou Xuebao/Journal of Building Structures | Year: 2015

The construction effect is obvious for the composite structure with below-hang truss. Based on a structure with below-hang truss, the key point and the scheme of its construction were discussed. The applicability of the staged construction simulation in this structural type by using different softwares was also discussed. Through the simulation and calculation, the stress and deformation trend of representative cantilever members was analyzed. The results show that the staged construction simulation should be conducted by the software with function of elements grouping, elements activation and elements inactivation. The stress and the deformation of the below-hang truss are optimized by construction in the inverted order method. It is also noted that the staged construction simulation is necessary to be done to obtain the construction scheme. ©, 2015, Science Press. All right reserved.


Hu K.,China Shipbuilding NRDI Engineering Co. | Jiang L.,China Shipbuilding NRDI Engineering Co. | Qu G.,China Shipbuilding NRDI Engineering Co. | LU X.-L.,Tongji University | And 2 more authors.
Gongcheng Lixue/Engineering Mechanics | Year: 2015

Based on explicit dynamic numerical simulation analysis, the large-scaled static loading test, the large-scaled shaking-table test, and the plane reinforced concrete frame collapse test, the paper investigated collapse mechanism under static loads and dynamic loads for reinforced concrete structures including high-rise frame structures and high-rise frame-core tube structures. Some key factors including the mechanical principle, the damage mechanism, the failure order and the failure range were analyzed. The development of "catenary action" in different working conditions were studied according to the beam deformation in the vicinity of the removed column, local condition of beam end, stress time-history curves of bottom bar and collapse damage situation. Mainwhile, suggestions on the collapse resistant design of these kinds of structures were put forward. ©, 2015, Tsinghua University. All right reserved.

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