Experimental and numerical investigations on the effects of radius of curvature and longitudinal slope on the responses of curved bridges subject to seismic pounding

Jiao, Chiyu; Lu, Junrui; Wang, Chuang; Long, Peiheng; Sun, Zhe

doi:10.1177/00202940211000377

Cited by 4 publications

(4 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 8 shows the time-history curve of the pounding force (Pf ) between the CRFB-FSP and AB bridge models under typical ground motions with PGA = 1.5 g. As Figure 8 shows, under the excitation of RSN55 and RSN292, the peak Pfs of CRFB-FSP were 5.9 kN and 13.2 kN; the pounding numbers were 4 and 3, respectively. The pounding may increase the damage risk and degree of the main beam and pier, which is consistent with the previous studies [14,21]. In addition, the pounding with the CRFB-FSP easily caused a persistent pounding, which may aggravate the damage of the bridge, especially for the seam joint at the pier bottom of the CRFB-FSP.…”

Section: Pounding Forcesupporting

confidence: 89%

“…The results showed that for this type of long-span girder bridge, even if the vibration period of adjacent bridges is similar, pounding may occur due to the influence of the wave passage effect. In addition, Wang, Jiao, and Leila et al [13][14][15], also studied the pounding response of adjacent structures through numerical simulation. In view of the serious impact of pounding on the seismic performance of bridges, Jia and Zhou et al [16,17], suggested using dampers or adjusting the bearing parameters to avoid the pounding.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Research on the Pounding Response and Pounding Effect of a Continuous Rigid-Frame Bridge with Fabricated Super-High Piers Connected by Grouting Sleeves

Wang

Huang

et al. 2022

Sustainability

View full text Add to dashboard Cite

The dynamic characteristics of a continuous rigid-frame bridge with fabricated super-high piers (CRFB-FSP) connected by grouting sleeves and adjacent continuous beam bridges (AB) are significantly different, and they are prone to pounding under earthquake excitation. At present, the pounding response between the CRFB-FSP and AB is still unclear, and the impact of the pounding on the seismic performance of a CRFB-FSP is still in the exploratory stage. In this study, two 1/20 scaled models of a CRFB-FSP (MB) and a cast-in-place AB were designed and manufactured. Then, according to the research purpose and the output performance of the shaking table, three each of non-long-period (NLP) ground motions and near-fault pulse-type (NFPT) ground motions were selected as the inputs of the excitation shaking table test. The peak ground acceleration (PGA) changes from 0.5 g to 1.5 g. According to the similarity ratio (1/20), the initial gap between the MB and AB was taken as 7 mm (prototype design: 140 mm). Furthermore, the longitudinal pounding response between the CFRB-FSP and AB, as well as its influence on the seismic performance of the CFRB-FSP, was systematically investigated through a shaking table test and finite element analysis (FEA). The results showed that the pounding with the CRFB-FSP easily caused a persistent pounding, which may increase the damage risk of the pier. The peak pounding force under the NFPT ground motion was more significant than under the NLP ground motion, whereas the pounding number under the NFPT ground motion was smaller. The peak pounding force increased with the increase in the initial gap, pounding stiffness, span, and pier height. With and without pounding, the CRFB-FSP reflected higher-order mode participation (HMP) characteristics. After pounding, under the NFPT excitation, the HMP contribution increased significantly compared with that of the without pounding condition, while this effect under the NLP excitation was smaller. The peak displacement of the main beam of the CRFB-FSP increased with the increase in the main beam span, pier height and initial gap. The peak bending moment of the pier bottom increased with the increase in the main beam span and initial gap, however, decreased with the increase in the pier height. Moreover, the peak displacement of the main beam and the peak moment of the pier bottom of the CRFB-FSP both reduced. In contrast, the corresponding seismic response of the AB increased under the same conditions.

show abstract

Section: Pounding Forcesupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Research on the Pounding Response and Pounding Effect of a Continuous Rigid-Frame Bridge with Fabricated Super-High Piers Connected by Grouting Sleeves

Wang

Huang

et al. 2022

Sustainability

View full text Add to dashboard Cite

show abstract

“…An experimental and numerical study by Jiao et al (2021) shows that unevenly distributed pounding forces can significantly increase the relative radial displacement of the deck corners of a curved bridge. The experimental data shows that the pounding force peak value and the number of pounding instances decrease if the distance between expansion joints increases, that the structures are more likely to collide under near-fault ground motions, and that the location of pounding mostly occurs at the corner of main beam, and the number of pounding instances inside the curve is larger.…”

Section: Contact Modelsmentioning

confidence: 99%

Seismic Performance of Isolated Bridges Under Beyond Design Basis Shaking

Sepulveda,

Bustamante,

Mosqueda

2024

PEER Reports

View full text Add to dashboard Cite

Seismically isolated highway bridges are expected to provide limited service under a safety evaluation-level ground shaking with minimal to moderate damage. The behavior under shaking beyond design considerations, corresponding to a large return period seismic hazard, is not well understood and could induce significant damage. In these rare events, the seismic isolation system can be subjected to displacement demands beyond its design capacity, resulting in failure of the bearings, exceeding the clearance and pounding against the abutment backwalls, or damage propagating to other primary structural components. To better understand the seismic performance of simple highway bridges subjected to earthquakes beyond design considerations, this study simulates the response of a prototype bridge structure and examines the lateral displacement demands, the transfer of forces to the substructure, and potential failure modes of seismically isolated bridges. Advanced modeling approaches are considered to capture bearing characteristics, such as hardening at large strains, and a pounding macro-element to capture the effects of impact. Results show that for beyond design shaking, the bearings can reach the maximum shear strain capacity, significant residual deformation of the abutment can result from pounding, and the columns can experience moderate damage. The progression of damage is identified in an effort toward the development of models suitable for assessing the overall seismic risk, repairability, and downtime of seismically isolated bridges.

show abstract

“…The results show that the influence of pounding on the displacement response of the stiff abutments can be neglected. Jiao et al [29][30][31][32] carried out the shaking table tests and the numerical analysis to investigate the pounding effect of curved bridge. It was concluded that the maximum pounding force was related to the radius of curvature.…”

Section: Introductionmentioning

confidence: 99%

Impact of Near-Fault Ground Motions on Longitudinal Seismic Response of CHRF Bridges

Zheng

Wang

et al. 2022

Sustainability

View full text Add to dashboard Cite

Curved high-pier rigid frame bridges (CHRF bridges) are unavoidably affected by near-fault ground motions (NFGMs), and seismic pounding between adjacent components of CHRF bridge has a significant effect on the seismic performance of CHRF bridges. The seismic response and seismic pounding laws of CHRF bridges under NFGMs need further investigation. In this study, the influence of NFGMs with impulse and directional effects on the dynamic response of CHRF bridges was studied. Subsequently, the pounding responses between adjacent components of CHRF bridge were systematically analyzed. The results showed that the impulse and directional effects of NFGMs have a significant impact on the seismic response of CHRF bridges. The seismic response of CHRF bridges under near-fault impulse-like ground motions (IPGMs) is greater than that under near-fault non-pulse-like ground motions (NPGMs). CHRF bridges have the lowest seismic response under far-fault ground motions (FFGMs). The seismic response of CHRF bridges is significant under backward region ground motions (BRGMs) and the lowest under forward region ground motions (FRGMs). The IPGMs induce larger pounding force (PF) and a smaller number of poundings (PN) compared with FFGMs. The PF and the PN increase from the FRGMs to the BRGMs. Because of the pounding, the impulse and directional effects of NFGMs cause the shear force of the main pier and the auxiliary pier of CHRF bridges to increase significantly and the relative bending moment decreases. Moreover, the shear force and bending moment of the tie beam increases significantly owing to pounding.

show abstract

Experimental and numerical investigations on the effects of radius of curvature and longitudinal slope on the responses of curved bridges subject to seismic pounding

Cited by 4 publications

References 21 publications

Research on the Pounding Response and Pounding Effect of a Continuous Rigid-Frame Bridge with Fabricated Super-High Piers Connected by Grouting Sleeves

Research on the Pounding Response and Pounding Effect of a Continuous Rigid-Frame Bridge with Fabricated Super-High Piers Connected by Grouting Sleeves

Seismic Performance of Isolated Bridges Under Beyond Design Basis Shaking

Impact of Near-Fault Ground Motions on Longitudinal Seismic Response of CHRF Bridges

Contact Info

Product

Resources

About