Chunguang Li

Changsha University of Science and Technology · civil engineering

Wind tunnel tests were conducted to investigate the wind pressure characteristics of sawtooth roofs in a simulated open country wind field with relatively low turbulence intensity. Models of monosloped and sawtooth roof (two to four spans) buildings that were 1-200 scale were constructed with intense pressure taps installed on the 15° sloped roofs....

The flutter stability of long-span suspension bridges during erection can be more problematic and more susceptible to be influenced by many factors than in the final state. As described in this paper, numerical flutter stability analyses were performed for the construction process of Zhongdu Bridge over Yangtze River using the commercial FE package...

An accurate identification of the aerodynamic characteristics of vehicles and the bridge is the premise for the coupled vibration analysis of a wind-vehicle-bridge system. At present, the interaction of aerodynamic forces between the road vehicles and bridge is ignored in most previous studies. In the present study, an experimental setup was develo...

This paper introduces the application of a rational and indicial function in the time-domain simulation of bridge deck self-excited aerodynamic forces. The limiting and transient characteristics of both expressions are analyzed and compared. Theoretical analysis and numerical results indicate that the limiting characteristics of the indicial functi...

Aerostatic stability of super long-span bridges is a much concerned issue during the design stage. Typical aerostatic instability is the so-called torsional divergence which may lead to abrupt structural failure. The iterative static-based FEM, which generally entails the assumption of smooth oncoming flow, has been widely used to evaluate the aero...

Wind tunnel experiments were conducted to investigate the wind characteristics in the mountainous valley terrain with 4 simplified valley models and a 1:500 scale model of an existing valley terrain in the simulated atmospheric neutral boundary layer model. Measurements were focused on the mean wind flow and longitudinal turbulence intensity. The r...

Aiming at calculation of the equivalent rigidity of truss stiffening girder in an aeroelastic model design of a long-span suspension bridge with truss stiffening girder, Aizhai bridge, a super-long -span suspension bridge across deep valley with single span, was taken as an example for investigation. In order to get the accurate equivalent rigidity...

In the case of a super-long span suspension bridge across wide mountain valley, steel truss stiffening girder is more adaptable for the bridge section than steel box girder due to the limitation of construction condition. However, the torsion rigidity and aerodynamic stability of the steel truss stiffening girder usually does not meet the requireme...

Taking Aizhai bridge-a super long suspension bridge with a main span of 1176 m as back-grond, this paper bring forward a way to test the wind field characteristic of deep valley in wind tunnel. The effects of valley wind on design wind speed of bridge were mainly studied and presented. According to the ratio of wind speed at the height of bridge de...

In the design of aeroelastic model of long-span concrete-filled steel tube arch bridge, the method of using an equivalent mandril to simulate the stiffness of whole arch rib is mainly used at present. Due to the presence of mandril, the aerodynamic shape of the model is changed. For this reason, a correctional method is presented to correct the win...