• Lighting should be checked at night and electrical cables to avoid any shock because of rusting or damage to the upper coating of cables because of weather.

• The deck or road should be checked using a monitoring system or chains by detecting sound to find any crack or void within it.

• Vibrations can be checked as it is a suspension bridge it may affect the bearings or joints (road or structural)

• The foundations are to be checked closely for any scouring or cracks.

TESTING EQUIPMENT TO CHECK THE PERFORMANCE OF BRIDGES

Magneto- Inductive Rope Testing

The "magneto-inductive approach" is a tried-and-true method for determining the outer and inner rope conditions. The rope is magnetised until it reaches saturation, which is when the magnetic flux in the rope core exceeds 1.9 Tesla. Any flaws in the rope, such as wire breakage or corrosion, disrupt the surrounding magnetic field, resulting in a stray field that can be detected with special sensors.

Visual Bridge Rope Inspection

"Bridgespect" rope testing technology allows the ropes to be visually inspected automatically. Four colour cameras set at right angles to each other record, document, and analyse the entire rope surface for damage. Climbers don't have to physically drive down the ropes, and the rope's condition can be fully documented. For all rope bridge operators, this is a significant benefit.

Deflection Monitoring and Assessment Using Connected Pipe System (Deng, May 2015)

Bridge deflection monitoring and assessment methodology based on the CPS. The dis-tributed pressure transmitters, which are coupled with pipes, can be put along the main girder of long-span bridges to trace the profile change of the main girder. The vertical deflection can be detected in real-time using pressure transmitters that continuously detect changes in liquid pressure in the connecting pipes.

Anemometers and Weather station

The bridge's instrumentation consists of eight sonic anemometers (3D WindMaster Pro from Gill Instrument Ltd) which can record at 32 Hz. It can be mounted directly on connectivity to the hangers or on top of the vertical steel pole suspended above the main cables and fastened to the main cable safety rails. The wind is monitored using acoustic anemometers along three perpendicular axes, namely the along-, across-, and vertical wind components. On the other side of the deck, a weather station on a hanger detects wind direction, wind speed, temperature, humidity, air pressure, and precipitation at sample rates of up to 4 Hz.

Strain Gauges

Strain gauges can be attached to main tensioning bolts at deck anchor points, Fixing is by epoxy (protected by foil-backed putty) or micro-welding (covered by butyl rubber and neoprene). Gauges are arranged in pairs 180 degrees apart around the bolt, each pair comprising an axial element and an element to measure hoop strain. The four gauges are connected to a full Bridge, with the hoop gauges providing the temperature compensation.

Vibration monitoring of bridges

RESNIK AND GERSTENBERG have created an autonomous low-cost sensor system for SHM as well as software for analysing vibrational features (2011). WILD-PFEIFFER AND SCHAFER (2011) designed a 3-axis accelerometer chip based on the micro-electro-mechanical system (MEMS) architecture. The developed gadget has a memory card port and an internal battery that lasts approximately 8 hours at maximum energy usage and up to 80 hours in typical conditions, making it suitable for measurement campaigns. Usability in inclement weather is ensured by a watertight enclosure and temperature-resistant components. Furthermore, real-time data transfer through wireless LAN or USB connection to a computer is possible.