Papers by Author: Qing Ning Li

Paper TitlePage

Authors: Fan Yang, Mu Biao Su, Qing Ning Li, Xian Li Yan, Tao Feng
Abstract: In order to accurately determine the weight of railway bridges parts, for railway concrete girder bridge case, this thesis is based on analysing the construction features of the railway concrete girder bridges and destructive characteristic of seismic damage and proposes a detailed method, which adopts combination of the analytic hierarchy process and the fuzzy synthetical evaluation. The weight of railway concrete girder bridges can be confirmed, by utilizing its logical and pairwise comparison method, Studies show that this is an effective method to confirm the weight of railway concrete girder bridges. It is of great value to quickly evaluate earthquake loss of railway bridges in the earthquake stricken areas.
Authors: Jing Jing Xi, Qing Ning Li, Tian Li Wang
Abstract: The field transfer matrixs and the point transfer matrixs can be established by the transfer matrix method, which can solve the internal forces and deformations problems of each cross-section, based on the solutions of deflection differential equation of the curved bridge. The bending-torsional coupling, horizontal bending and axial deformations should be considered into the structural analysis of the curved bridge, under the influence of curvature. To establish the general transfer equation requires the field transfer matrixs and the point transfer matrixs of the curved bridge in horizontal and vertical directions. The state vectors of each cross-section can be obtained depending on the general transfer equation.
Authors: Qing Ning Li, Feng Jie Jiang, Tian Li Wang, Jian Pen Sun, Lei Juan Wang
Abstract: The curvature radius is a very important factor which influences the dynamic performance of the curved continuous long bridge badly. This paper based on the practical engineering, with large finite element program, established the curved continuous long bridge space finite element calculation model. Respectively by response spectrum method and the time-history response method, consider single-point excitation and multi-support excitation seismic action, Analyzes different radius of curvature in curved continuous long bridge self-vibration frequency, internal force and displacement on the differences, and given the internal relations between the difference and the curvature radius, offer some reasonable design reference suggestion for curved continuous long bridge of the radius of curvature.
Authors: Qing Ning Li, Qing Mei Liu, Lin Zhao
Abstract: A steel reinforced concrete frame-concrete core wall structure is taken as the research object in this paper. The whole space finite element models are established by software ETABS, modal analysis, response spectrum method and elastic time-history analysis are conducted. And static elastio-plastic time history analysis of the high-rise structure is conducted by software MIDAS/GEN. Seismic response of the high-rise structure is analyzed under medium earthquake and rare earthquake , elastic deformation is calculated under conventional earthquake and elastic-plastic deformation is calculated under rare earthquake. The results show that the structure can meet the requirements of no-damage under light earthquake, repairable under medium earthquake and no-collapse under strong earthquake.
Authors: Yong Cun Zhang, Qing Ning Li
Abstract: By analyzing and simplifying the force status about the concave water surface and wall of concrete capillary pores,the model for force calculation of capillary walls is established.When the concave water surface is going down,capillary walls will contract. Concrete volume shrinkage strain at different surface tension is approximately calculated out by using finite element software ANSYS,from which the relationship between the surface tension of capillary water and drying shrinkage,early self-shrinkage of concrete is obtained.
Showing 1 to 5 of 5 Paper Titles