Effect of dynamic impact at modular bridge expansion joints on bridge design

2016 ◽  
Vol 127 ◽  
pp. 645-662 ◽  
Author(s):  
Yong Ding ◽  
Wei Zhang ◽  
Francis T.K. Au
Keyword(s):  
Bridge Design ◽  
Dynamic Impact ◽  
Expansion Joints ◽  
Modular Bridge Expansion Joints

Modular Bridge Expansion Joints for Lacey V. Murrow Floating Bridge

1997 ◽  
Vol 1594 (1) ◽  
pp. 163-171 ◽  
Author(s):  
John A. Van Lund ◽  
Mark R. Kaczinski ◽  
Robert J. Dexter
Keyword(s):  
Fatigue Strength ◽  
Fatigue Cracking ◽  
Field Measurements ◽  
The United States ◽  
Limit States ◽  
Expansion Joints ◽  
Lake Washington ◽  
Floating Bridge ◽  
Modular Bridge Expansion Joints ◽  
Washington State Department

The Lacey V. Murrow Bridge (LVM Bridge) is a 2013-m-long floating bridge on Interstate 90 across Lake Washington in Seattle, Washington. Single-support-bar, swivel-joist modular bridge expansion joint systems are located at each end of the bridge between the shore approach spans and the floating pontoons. These joints were designed for 960 mm of longitudinal movement as well as horizontal and vertical rotations caused by wind, wave, temperature, and changes in lake level elevation. A similar joint in an adjacent floating bridge had experienced premature fatigue cracking at welded attachment details because of low fatigue strength. For the LVM Bridge the joint components were fatigue tested and designed by using fatigue limit-states loads, resulting in welded attachment details with improved fatigue strength. In addition, a stiffer center beam and reduced center-beam span lengths produced lower fatigue stress ranges. Joint movements and rotations, fatigue design methodology, results of dynamic analyses, field measurements of the dynamic response, and construction details are described. The total cost of the LVM joints was 1 percent of the final bridge cost. The Washington State Department of Transportation required a 5-year guarantee for the LVM joints. These are the largest modular bridge expansion joints in the United States to be tested and designed for fatigue.

Dynamic numerical analysis of single-support modular bridge expansion joints

2016 ◽  
Vol 22 (1) ◽  
pp. 1-12
Author(s):  
Xinzhe Yuan ◽  
Ruiqi Li ◽  
Jian'guo Wang ◽  
Wancheng Yuan
Keyword(s):  
Numerical Analysis ◽  
Expansion Joints ◽  
Modular Bridge Expansion Joints

scholarly journals Monitoring Fatigue Damage of Modular Bridge Expansion Joints Using Piezoceramic Transducers

Sensors ◽  
2018 ◽  
Vol 18 (11) ◽  
pp. 3973 ◽  
Author(s):  
Tianyong Jiang ◽  
Yaowen Zhang ◽  
Lei Wang ◽  
Liang Zhang ◽  
Gangbing Song
Keyword(s):  
Fatigue Test ◽  
Fatigue Damage ◽  
Lead Zirconate Titanate ◽  
Comparative Approach ◽  
Active Sensing ◽  
Expansion Joints ◽  
Static Test ◽  
Damage Degree ◽  
Full Penetration ◽  
Modular Bridge Expansion Joints

Modular bridge expansion joints (MBEJs) are commonly used in bridges and are often subjected to fatigue damages, which necessitate fatigue monitoring of MBEJs to ensure the reliable operation of the bridges. In this paper, a stress wave based active sensing approach using piezoceramic transducers is developed to monitor the fatigue damage of MBEJ. A MBEJ involves mainly center beam, edge beam, support bar, support box, sliding bearing, sliding spring, elastomeric strip seal, full-penetration weld and reinforcing plate. In practice, for a MBEJ, the part that is most prone to fatigue damage is the full-penetration weld between the center beam and the support bar. In this paper, a specimen, which is the full-scale center-beam/support-bar (CB/SB) assembly, was designed and fabricated to facilitate the experimental study. The assembly mainly includes center beam, support bar, reinforcing plate, and full-penetration weld. The lead zirconate titanate (PZT) transducer bonded on the support bar was used as the actuator and the PZT transducer mounted on the center beam was as the sensor. Dial indicators were utilized to measure the vertical displacement of the center beam. Two series of tests, including static test, and fatigue test, were performed on the specimen in an alternating fashion. Based on the number of cyclic loading, the experiment was divided into six different stages: 0th cycle (the healthy state), 0.8 million cycles, 1.6 million cycles, 2.4 million cycles, 3.2 million cycles, and 4 million cycles. The signals received by the PZT sensor were analyzed with the help of wavelet packet analysis. In addition, the structure stiffness also was considered as a comparative approach in this paper. Experimental results show that during the fatigue test, the structure stiffness decreases with the number of cycle loading. However, the method can only obtain the fatigue damage impact on the entire structure, and cannot determine the fatigue damage degree of a certain weld. On the other hand, the proposed method can accurately monitor the fatigue damage degree of full-penetration welds. The research results show that the developed piezoceramic enabled active sensing approach can monitor and estimate the fatigue damage in MBEJ in real-time.

scholarly journals Geotechnical Design Practices and Soil–Structure Interaction Effects of an Integral Bridge System: A Review

2021 ◽  
Vol 11 (15) ◽  
pp. 7131
Author(s):  
Lila Dhar Sigdel ◽  
Ahmed Al-Qarawi ◽  
Chin Jian Leo ◽  
Samanthika Liyanapathirana ◽  
Pan Hu
Keyword(s):  
Soil Structure ◽  
Structural Constraints ◽  
Bridge Design ◽  
Expansion Joints ◽  
Shrinkage Temperature ◽  
Design Practices ◽  
Integral Bridge ◽  
First Choice ◽  
Integral Bridges ◽  
Geotechnical Design

Integral bridges are a class of bridges with integral or semi-integral abutments, designed without expansion joints in the bridge deck of the superstructure. The significance of an integral bridge design is that it avoids durability and recurring maintenance issues with bridge joints, and maybe bearings, which are prevalent in traditional bridges. Integral bridges are less costly to construct. They require less maintenance and therefore cause less traffic disruptions that incur socio-economic costs. As a consequence, integral bridges are becoming the first choice of bridge design for short-to-medium length bridges in many countries, including the UK, USA, Europe, Australia, New Zealand and many other Asian countries. However, integral bridge designs are not without challenges: issues that concern concrete creep, shrinkage, temperature effects, bridge skew, structural constraints, as well as soil–structure interactions are amplified in integral bridges. The increased cyclic soil–structure interactions between the bridge structure and soil will lead to adverse soil ratcheting and settlement bump at the bridge approach. If movements from bridge superstructures were also transferred to pile-supported substructures, there is a risk that the pile–soil interactions may lead to pile fatigue failure. These issues complicate the geotechnical aspects of integral bridges. The aim of this paper is to present a comprehensive review of current geotechnical design practices and the amelioration of soil–structure interactions of integral bridges.

scholarly journals Diagnostics of Bridge Bed Sections and Approaches in Zones of Expansion Joints on Road Bridges

2021 ◽  
Vol 20 (1) ◽  
pp. 10-15
Author(s):  
V. A. Hodyakov ◽  
A. V. Kulan ◽  
E. N. Savina ◽  
I. L. Boiko ◽  
V. A. Grechuhin
Keyword(s):  
Data Collection ◽  
Three Dimensional ◽  
Vibration Response ◽  
Vibration Velocity ◽  
Dynamic Impact ◽  
Vibration Displacement ◽  
Expansion Joints ◽  
Scanning Method ◽  
Natural Operation ◽  
Bridge Structures

The object of the study is durability of expansion joints in bridge structures; the subject of the research is the vibration response of a structure obtained under conditions of natural operation. Diagnostics of the road bridge expansion joints has been carried out in order to identify characteristic dependences  between the value of structure vibration response and types of expansion joint designs during the period of their operation while taking into account the features of the bridge structure. For this purpose, we have tested the methodology for collecting and processing data on the vibration response of the structure under natural conditions of its operation. The paper presents results of data collection on the coverage topology which have been obtained while using three-dimensional scanning method. Data collection on the vibration response of the structure has been carried out by measuring the vibration velocity and deformation of the structure. The data obtained are analyzed. As a result of testing and analysis of the obtained data, the main characteristics have been revealed: the value of base unevenness, the amplitude of vibration velocity and vibration displacement of the structure elements. Two main parameters of the dynamic impact have been assigned, adjusted for the mass of a moving vehicle, which can be used as main parameter for assessing the magnitude of the dynamic impact. A comprehensive method for assessing the dynamic impact on bridge structures has been developed and proposed in the paper, and its use will make it possible to differentiate various designs of expansion joints according to the magnitude of the dynamic impact of vehicles. This, in its turn, will contribute to formulate new recommendations on the use of specific types of expansion joints for various categories of highway, which will increase operational durability of  expansion joints and the structure as a whole.

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