Seismic retrofitting of expressway bridges in Japan

Ogata, Tatsuo; Osada, Koji

doi:10.1016/s0958-9465(99)00045-1

Cited by 17 publications

(5 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Accurate evaluation of the compressive strength of stabilized soils by seismic methods is a modern approach. It can effectively be applied to a highway engineering and construction of tunnels, bridges and highways [69][70][71][72]. The presented modelling and data analysis reports have shown that test time and cement content in a binder are critical for measuring compressive strength by seismic waves velocity, while composition of the dredged masses (i.e.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Resonant Frequency Ultrasonic P-Waves for Evaluating Uniaxial Compressive Strength of the Stabilized Slag–Cement Sediments

Lindh

Lemenkova

2021

Nordic Concrete Research

View full text Add to dashboard Cite

Marine sediments can be stabilized by ultra high-strength binders: cement, Cement Kiln Dust (CKD) and slag. The properties of the stabilized soil indicate potential to their reuse. This study investigated the performance of the unconfined compressive strength (UCS) in the marine sediments stabilized by binder (cement, CKD, slag), tested by ultrasonic P-waves. Materials include 194 specimens collected from the port of Gothenborg. The experiment was performed in Swedish Geotechnical Institute (SGI). The UCS of specimens stabilized by different ratio of binders (cement, CKD, slag) was tested by resonance frequencies of the elastic P-waves. The significant increase in the UCS (>1500 kPa) was recorded for the highest values of CKD and cement, and low values of slag. The correlation profiles of low water/high binder (LW/HB) cement/slag (40/60%) were controlled by curing time. The slag–cement–CKD simplex tests demonstrated UCS of samples with low/high water content and various binder ratio of cement (kg/m3). The ratio of cement binder and curing time play a critical role in the increase of UCS followed by mechanical properties of specimens and intensity of stress. The highest values exceed 1000 m/s in P-waves. The results shown high accuracy (97%) and non-contacting approach for testing UCS of sediments. Seismic methods can be applied to test the UCS of the stabilized sediments, and also in-situ via seismic CPT, surface testing or cross hole seismic testing.

show abstract

Section: Introductionmentioning

confidence: 99%

“…Resonant frequency testing of the compressive strength, compared to the traditional methods in civil engineering [76][77] is non-destructive and environmentally sustainable approach. Seismic measurements are based on the remote sensing principles using geophysical properties of materials [66][67][68][69][78][79][80][81].…”

Section: Introductionmentioning

confidence: 99%

Resonant Frequency Ultrasonic P-Waves for Evaluating Uniaxial Compressive Strength of the Stabilized Slag–Cement Sediments

Lindh

Lemenkova

2021

Nordic Concrete Research

View full text Add to dashboard Cite

show abstract

“…is restricted. Taking into account the typical cross-sections of bridge piers and the diameter of the reinforcement used, the thickness of the cross-section with the RC sheathing increases by about 0.5 m. On the other hand, steel or high-performance material sheathing can increase the ductility and resilience of the cross-section by only a few centimeters [ 54 ]. Steel jacketing is most effective on circular columns where the sheathing is prefabricated in two halves that are positioned and welded around the column.…”

Section: Seismic Retrofitting Of Existing Bridgesmentioning

confidence: 99%

Seismic Assessment and Retrofitting of Existing Road Bridges: State of the Art Review

et al. 2022

View full text Add to dashboard Cite

The load-carrying capacity assessment of existing road bridges, is a growing challenge for civil engineers worldwide due to the age and condition of these critical parts of the infrastructure network. The critical loading event for road bridges is the live load; however, in earthquake-prone areas bridges generally require an additional seismic evaluation and often retrofitting in order to meet more stringent design codes. This paper provides a review of state-of-the-art methods for the seismic assessment and retrofitting of existing road bridges which are not covered by current design codes (Eurocode). The implementation of these methods is presented through two case studies in Croatia. The first case study is an example of how seismic assessment and retrofitting proposals should be conducted during a regular inspection. On the other hand, the second case study bridge is an example of an urgent assessment and temporary retrofit after a catastrophic earthquake. Both bridges were built in the 1960s and are located on state highways; the first one is a reinforced concrete bridge constructed monolithically on V-shaped piers, while the second is an older composite girder bridge located in Sisak-Moslavina County. The bridge was severely damaged during recent earthquakes in the county, requiring urgent assessment and subsequent strengthening of the substructure to prevent its collapse.

show abstract

“…9b) have shown that significant increases can be gained in the ductility of bridge column bents strengthened with FRP composites (Pantelides et al 1999(Pantelides et al , 2007. FRP composites have been used widely for seismic strengthening of existing bridges (Priestley et al 1996;Ogata and Osada 2000), as shown in Fig. 9c for the State Street Bridge on I-80 in Salt Lake City, Utah (Pantelides et al 2004).…”

Section: Bridge Seismic Strengtheningmentioning

confidence: 99%

Strengthening Techniques: Bridges

Pantelides

2014

Encyclopedia of Earthquake Engineering

View full text Add to dashboard Cite

Seismic retrofitting of expressway bridges in Japan

Cited by 17 publications

References 2 publications

Resonant Frequency Ultrasonic P-Waves for Evaluating Uniaxial Compressive Strength of the Stabilized Slag–Cement Sediments

Resonant Frequency Ultrasonic P-Waves for Evaluating Uniaxial Compressive Strength of the Stabilized Slag–Cement Sediments

Seismic Assessment and Retrofitting of Existing Road Bridges: State of the Art Review

Strengthening Techniques: Bridges

Contact Info

Product

Resources

About