A roadway expansion joint apparatus comprises at least one finger joint that extends across an expansion gap. Each finger joint comprises a base plate, a finger unit, a pivot and a cantilever support. The finger unit comprises a body and at least one unsupported finger extending longitudinally from a distal end of the body. The pivot pivotally couples the finger unit to the base plate about a vertical pivot axis. The cantilever support is located at or between the pivot and a proximal end of the finger unit; the cantilever support allows pivoting of the finger unit relative to the base plate about a vertical pivot axis and impedes pivoting of the finger unit relative to the base plate about a horizontal axis, thereby cantilevering the finger joint to the base plate at the cantilever support.

A roadway expansion joint apparatus comprises at least one finger joint that extends across an expansion gap. Each finger joint comprises a base plate, a finger unit, a pivot and a cantilever support. The finger unit comprises a body and at least one unsupported finger extending longitudinally from a distal end of the body. The pivot pivotally couples the finger unit to the base plate about a vertical pivot axis. The cantilever support is located at or between the pivot and a proximal end of the finger unit; the cantilever support allows pivoting of the finger unit relative to the base plate about a vertical pivot axis and impedes pivoting of the finger unit relative to the base plate about a horizontal axis, thereby cantilevering the finger joint to the base plate at the cantilever support.

An apparatus includes a first platform, a second platform disposed above the first platform, a scaffolding connecting the first and second platforms including an upper support beam, a middle support beam, and a lower support beam, and a cable attached to the upper support beam. The lower support beam supports the first platform. The middle support beam supports the second platform. The upper support beam is disposed above the second platform.

When the measurement values measured by a first sensor among a plurality of sensors installed in a dispersed manner at a specific location, in first cycles are determined to be abnormal values, a control device activates the first sensor in second cycles that are shorter than the first cycles. Moreover, when the abnormal values are included in the trend of temporal variation, the control device activates a plurality of second sensors, which is installed around the first sensor, in the second cycles. Moreover, when the measurement values measured by the first sensor and the plurality of second sensors in the second cycles are included in the trend of surface-direction distribution, the control device outputs the measurement values measured by the first sensor and the plurality of second sensors.

When the measurement values measured by a first sensor among a plurality of sensors installed in a dispersed manner at a specific location, in first cycles are determined to be abnormal values, a control device activates the first sensor in second cycles that are shorter than the first cycles. Moreover, when the abnormal values are included in the trend of temporal variation, the control device activates a plurality of second sensors, which is installed around the first sensor, in the second cycles. Moreover, when the measurement values measured by the first sensor and the plurality of second sensors in the second cycles are included in the trend of surface-direction distribution, the control device outputs the measurement values measured by the first sensor and the plurality of second sensors.

Provided are an imaging evaluation map, an imaging evaluation map generating device, an imaging evaluation map generating method, and an imaging evaluation map generating program capable of easily making an imaging plan. A coordinate space setting section (31) that sets a coordinate space including an object, an imaging candidate position setting section (32) that sets a plurality of imaging candidate positions in the coordinate space, an imaging condition setting section that sets an imaging condition for the object (33), a characteristic part setting section (34) that sets a plurality of characteristic parts for the object, an evaluation standard setting section (35) that sets an evaluation standard for imaging based on the imaging candidate position and the imaging condition for each characteristic part, an evaluation value calculating section (36) that calculates an evaluation value that represents an evaluation of imaging in a case where an object is imaged under the imaging condition set by the imaging condition setting section (33) at the imaging candidate positions set by the imaging candidate position setting section (32) for each imaging candidate position, and an imaging evaluation map generating section (37) that generates an imaging evaluation map in which the evaluation value is determined for each imaging candidate position are provided. In a case where the evaluation value for each imaging candidate position is calculated, the evaluation value calculating section (36) calculates individual evaluation values for the respective characteristic parts according to the evaluation standard, and calculates a sum of the obtained individual evaluation values for the respective characteristic parts as the evaluation value.

The present application belongs to the technical field of bridge engineering, and particularly relates to a structure for relieving cracking of a steel bridge deck. The structure for relieving cracking of a steel bridge deck comprises a steel bridge deck and a plurality of U-ribs welded and fixed to a bottom of the steel bridge deck, and further inventions an iron-based shape memory alloy (Fe-SMA) fixing unit, a filling unit, a structural layer, and a test wire. A Fe-SMA having a restoration capability in the case of heating is used and formed into a honeycomb structure to greatly reduce an amplitude of fatigue stress and an influence of fatigue cracking of a welding part on the bridge deck.

The present application belongs to the technical field of bridge engineering, and particularly relates to a structure for relieving cracking of a steel bridge deck. The structure for relieving cracking of a steel bridge deck comprises a steel bridge deck and a plurality of U-ribs welded and fixed to a bottom of the steel bridge deck, and further inventions an iron-based shape memory alloy (Fe-SMA) fixing unit, a filling unit, a structural layer, and a test wire. A Fe-SMA having a restoration capability in the case of heating is used and formed into a honeycomb structure to greatly reduce an amplitude of fatigue stress and an influence of fatigue cracking of a welding part on the bridge deck.

The invention discloses a method and a system for predicting the corrosion fatigue life of prestressed concrete bridges. A corrosion level of the strand is predicted to obtain the residual tension force of a structure. A stress concentration factor is integrated to consider the stress concentration effect caused by pitting corrosion, and a growth model of the elastic stress of the strand under the coupled effect of corrosion and fatigue is proposed. A growth model of the plastic stress of the strand is established using a cross-section loss of the strand as a fatigue damage parameter based on a degenerated elastic modulus of the concrete after fatigue. Failure criteria for the concrete, the strand, and a longitudinal tension bar are defined, so that a set of methods for analyzing the life of a prestressed concrete bridge subjected to corrosive environment and fatigue load are formed.

Disclosed herein is a method for monitoring a health status of one or of a plurality of bridges (10) under normal traffic condition. The method comprises: a) providing at least one sensing device (12) per bridge configured to measure a physical quantity variation related to the integrity of said one or said plurality of bridges; b) providing a fleet of heavy vehicles (14), wherein an estimation of the weight of each heavy vehicle is known with a deviation of no more than 10% of the actual weight of each heavy vehicle; c) acquiring a set of physical data related to the integrity of said one or said plurality of bridges (10) from said at least one sensing device (12) when at least one heavy vehicle of the fleet crosses one bridge (10); d) determining the configuration of other vehicles (15a, 15b, 15c, 15d, 15e) on the bridge, if any, when said at least one heavy vehicle (14) crosses said one bridge; e) repeating steps c) and d) in order to acquire multiple sets of physical data related to the integrity of said one or said plurality of bridges (10) so that the number of sets of integrity data associated with one bridge (10) permits to measure or observe a deviation, and c) obtaining a health status of said one or said plurality of bridges based on the deviation between said multiple sets of physical data associated with one bridge.