Li Y.,Xian University of Technology |
Li H.,Anhui Transport Consulting and Design Institute Co. |
Wang T.,Xian University of Technology |
Bai H.,Xian University of Technology
World Information on Earthquake Engineering | Year: 2012
According to the characteristics of long-span and high-rise bridge, the soil-structure interaction was taken into account by using horizontal and rotational spring elements and the finite element analysis (FEA) model was established based on the ANSYS software. Meanwhile, reasonable strong seismic motion records were selected according to the applicable Code of Seismic Design for Railway Engineering, and the nonlinear time history analyses for elasto-plastic seismic response of long-span and high-rise bridge considering soil - structure interaction were carried out. The study results are obtained as follow: the flexible soil condition can lead to the enlargement of seismic response;The proportionality factor of foundation coefficient is an important factor which will enlarge the result;The effect of PGA on elasto-plastic seismic response of long-span and high-rise bridge is not affected by the soil - structure interaction. The resuts give a reference to seismic design and checking calculation of super high-rise pier.
Wu W.-Q.,Nanjing Southeast University |
Yang S.,Anhui Transport Consulting and Design Institute Co. |
Zhang L.-Z.,Nanjing Southeast University
Bridge Construction | Year: 2014
To work out the rational transverse distribution pattern of settlement deformation of main beams of the widened new wide voided slab beam bridge, a simply-supported slab beam bridge of the same kind in the extension project of the Jiangsu Section of Beijing-Shanghai Expressway was taken as an example and the test study and finite element analysis were carried out. The scaled-down test model of 1:4 for the example bridge was prepared. The settlement deformation of the main beams of the new bridge was measured under condition that the foundation settlement differences of the old and new bridges were respectively 1, 2 and 3 mm. The software Origin was used to fit and analyze the data of the settlement deformation, the software MIDAS FEA was used as well to set up the solid finite element model for the whole bridge of the bridge and to further analyze and develop the curve equation for the transverse distribution status of the settlement deformation. The results of the study indicate that in the process of widening of the wide voided slab beam bridge, under the action of the foundation settlement of the new bridge, the transverse distribution pattern of the vertical settlement deformation of the main beams of the new bridge has great differences from the previously assumed linear distribution pattern and the differences should be rectified. In comprehensive consideration of the issues of relevance and accuracy, it will be rational to assume the transverse distribution pattern of the settlement deformation of the main beams to be the quadratic curve.
Wu Z.-G.,Anhui Transport Consulting and Design Institute Co. |
Wang C.-L.,China Communications Construction Company Ltd.
Bridge Construction | Year: 2013
The main bridge of Maanshan Changjiang River Highway Bridge is a three-tower suspension bridge with main spans of 2×1 080 m. The main cables of the bridge are made up of the prefabricated parallel wire strands (PPWS), of which each strand is formed by 91 nos. of φ5.2 mm high-strength galvanized steel wires, the unstressed length of a single strand is about 3 045.53 m and the weight of the strand is 46.2 t. A steel wire for the strands of the main cables was manufactured by cold drawing. In the manufacturing of the strands, the workmanship of the rationally manufactured marking wires and the controlled zinc filling and jacking for the strand sockets was applied. The main cables were erected by the PPWS method. In the erection of the cables, the progress, quality and safety of the erection were guaranteed by the improved strand unreeling device, hauling and connecting device, support structure, cable shape maintaining device and by the rational control measure for the strand twisting. Practice proved that the speed of the erection of the main cables of the bridge was fast and the strand unreeling and shaping was good.
Xiao Y.,Anhui Communications Vocational and Technical college |
Guo Q.,Anhui Communications Vocational and Technical college |
Tang G.,Anhui Transport Consulting and Design Institute Co.
Metallurgical and Mining Industry | Year: 2015
This paper presents a measurement method of dynamic bridge deflection detection in high frequency based on digital imaging technology. This system based on digital imaging theory and the hardware including matrix camera, long telephoto lens, laser rangefinder, target markers, auxiliary lighting, and industrial tablet. Target markers were continuously collected by the camera in high frequency, wirelessly transferred to industrial tablet. Based on the algorithm of HALCON, target images were recognized by user application program which is developed under Visual Studio 2010 C++. By calculating the center position of the target image, the target markers displacement is achieved. Experiments show that the method can achieve the detection accuracy of 0.1 mm and this method is characterized with non-contact, remote and dynamic automated detection, high precision, etc.
Wei Y.-Q.,Southwest Jiaotong University |
Wei Y.-Q.,Anhui Transport Consulting and Design Institute Co. |
Luo Q.,Southwest Jiaotong University |
Zhang L.,Southwest Jiaotong University |
And 3 more authors.
Yantu Lixue/Rock and Soil Mechanics | Year: 2015
Matching error can come from the interaction between earth pressure transducer and soil in centrifugal field. To grasp it, characteristics of nonlinear response and main affect factors in high modulus soil are examined with the tests of liquid calibration and the tests of calibration for soil in centrifugal field with the matching error theory. Test results show that the calibration for liquid indicates that the response of the miniature earth pressure transducer is highly linear. The calibration for soil in centrifugal field indicates that the significant nonlinear response of the miniature earth pressure transducer is caused by the change of soil modulus in the loading process. Nonlinear correction of test data with the nonlinear expression can significantly improve the accuracy of the miniature earth pressure transducer in high modulus soil. The nonlinear expression is established between the matching error and the modulus of soil. ©, 2015, Academia Sinica. All right reserved.