Serviceability Assessment Method of Stay Cables with Vibration Control Using First‐Passage Probability

Abstract

As the construction of long-span bridges such as cable-stayed bridges increases worldwide, maintaining bridge serviceability and operability has become an important issue in civil engineering. The stay cable is a principal component of cable-stayed bridges and is generally lightly damped and intrinsically vulnerable to vibration. Excessive vibrations in stay cables can potentially cause long-term fatigue accumulation and serviceability issues. Previous studies have mainly focused on the mitigation of cable vibration within an acceptable operational level, while little attention has been paid to the quantitative assessment of serviceability enhancement provided by vibration control. This study accordingly proposed and evaluated a serviceability assessment method for stay cables equipped with vibration control. Cable serviceability failure was defined according to the range of acceptable cable responses provided in most bridge design codes. The cable serviceability failure probability was then determined by means of the first-passage problem using VanMarcke’s approximation. The proposed approach effectively allows the probability of serviceability failure to be calculated depending on the properties of any installed vibration control method. To demonstrate the proposed method, the stay cables of the Second Jindo Bridge in South Korea were evaluated and the analysis results accurately reflected cable behavior during a known wind event and show that the appropriate selection of vibration control method and properties can effectively reduce the probability of serviceability failure.

Automated Real-Time Assessment of Stay-Cable Serviceability Using Smart Sensors

“…With increasing demand for long-span bridges, cable-stayed bridges have been widely applied to construction owing to their high structural stiffness and aesthetic appearance [1,2]. Since the construction of the Stromsund bridge as the first modern cable-stayed bridge in Sweden (1955) [3], the maintenance of constructed bridges has received substantial attention to preserve their structural integrity and prolong their service life [4]. Among the various maintenance concerns of cable-stayed bridges, wind-rain-induced vibration has been recognized as one of the primary problems threatening their structural operability and serviceability since its first observation at the Meiko-West Bridge in Japan reported in 1986 [4,5].…”

“…Since the construction of the Stromsund bridge as the first modern cable-stayed bridge in Sweden (1955) [3], the maintenance of constructed bridges has received substantial attention to preserve their structural integrity and prolong their service life [4]. Among the various maintenance concerns of cable-stayed bridges, wind-rain-induced vibration has been recognized as one of the primary problems threatening their structural operability and serviceability since its first observation at the Meiko-West Bridge in Japan reported in 1986 [4,5]. A stay-cable, which is one of the most significant load-carrying members of a cable-stayed bridge, is vulnerable to vibrations induced by external loads such as wind, rain, and traffic owing to its inherent low damping ratio with high flexibility [4,[6][7][8][9].…”

“…Among the various maintenance concerns of cable-stayed bridges, wind-rain-induced vibration has been recognized as one of the primary problems threatening their structural operability and serviceability since its first observation at the Meiko-West Bridge in Japan reported in 1986 [4,5]. A stay-cable, which is one of the most significant load-carrying members of a cable-stayed bridge, is vulnerable to vibrations induced by external loads such as wind, rain, and traffic owing to its inherent low damping ratio with high flexibility [4,[6][7][8][9]. Among other factors, excessive vibrations in a stay-cable cause long-term fatigue in it and impact the structural integrity of the entire bridge [4,8,10,11].…”

“…A stay-cable, which is one of the most significant load-carrying members of a cable-stayed bridge, is vulnerable to vibrations induced by external loads such as wind, rain, and traffic owing to its inherent low damping ratio with high flexibility [4,[6][7][8][9]. Among other factors, excessive vibrations in a stay-cable cause long-term fatigue in it and impact the structural integrity of the entire bridge [4,8,10,11]. Therefore, civil engineers are required to conduct maintenance measures on high priority to maintain the structural integrity of not only stay-cables but also cable-stayed bridges [4,[9][10][11][12].…”

“…Among other factors, excessive vibrations in a stay-cable cause long-term fatigue in it and impact the structural integrity of the entire bridge [4,8,10,11]. Therefore, civil engineers are required to conduct maintenance measures on high priority to maintain the structural integrity of not only stay-cables but also cable-stayed bridges [4,[9][10][11][12].…”