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Study on the Construction Control of Foshan Jiujiang Composite Cable-stayed Bridge

Author: LinZhiSheng
Tutor: YanQuanSheng
School: South China University of Technology
Course: Bridge and Tunnel Engineering
Keywords: Composite beam cable-stayed bridge The tangent installation displacement method Construction Control Parameter correction Kalman filter method
CLC: U448.27
Type: Master's thesis
Year: 2010
Downloads: 112
Quote: 1
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Abstract


Composite beam cable-stayed bridge is known for its fast speed of construction, excellent spanning capacity, simple construction methods and economy in China in recent years has been widely used, can be said composite beam cable-stayed bridge is the most in the field of long-span bridges competitive bridge type. However, due to its special cantilever erection construction technology, construction of the the cable force applied bias, install the cable line deviation, the structure weight and imposed load value and the design value inconsistent impact on the final bridge linear stress distribution . Therefore composite beam cable-stayed bridge is also a high-order super statically determinate and bridge construction with high technical content. And because its main beam frame, linear advance at the factory prefabricated cantilever erection and then in the field, mosaic with high-strength bolts, angle of rotation between the bulk of the construction with the end of the beam elevation adjustable range is limited, so strict and successful construction control a composite beams CONSTRUCTION success guarantee. Based on State Road 325 Jiujiang Bridge restoration project to explore several key technical issues in the composite beam cable-stayed bridge construction control. 1, segmental construction installation linear stress-free linear site construction prefabricated factory, this works, there are some misconceptions. This article discusses the installation of a linear prefabricated linear relations and differences. According to the principle of force and deformation coordination, application installation linear loop iteration zero initial displacement method tangential displacement method to fight at the the Jiujiang Bridge of pre-linear calculation, and mutual authentication, and ultimately get the the Jiujiang Bridge Pre-Fight linear results. 2, the structure of the main tower of the main beam, concrete bridge deck reasonable force distribution, application of large-scale finite element software ANSYS including the establishment of three-dimensional model of three-dimensional bar unit, space beam element and the elastic shell element space, resulting in various stages of construction of bridges and bridge deck stress and strain distribution, and compared with the construction of the test results confirmed the flat-slab unit model is feasible in the stress control composite beam cable-stayed bridge. 3, in the composite beam cable-stayed bridge construction control, precision cable force measurement is extremely important, correct measurement results after the sequence of construction to adjust the cable force and elevation. This paper compares the frequency method and sensing hydraulic test in Jiujiang Bridge Construction Control obtained frequency method is more suitable for long cable, flexible cable, pressure sensor test in the short soso force test significantly superior sex. Since the stiffness effect of the lanyard cable force the proportion is too large, the frequency method lanyard test has some limitations. Article also try two loads applied for the construction of Jiujiang Bridge, two dead load value parameter correction, proved Kalman filter method has certain application in the composite beam cable-stayed bridge construction control.

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CLC: > Transportation > Road transport > Bridges and Culverts > All kinds of bridges > Bridge: Structure > Cable-stayed bridge
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