Seismic Response on the Mangjiedu Long-Span PC Continuous Rigid Frame Bridge with High Piers

Abstract

The selected high-span continuous rigid frame bridge for studying is Mangjiedu Bridge in this paper. Based on the principle of structure dynamics and the method of seismic response analysis, the finite element model of the main bridge in Mangjiedu Bridge under Midas-civil was built according to the structural features, site conditions and seismic fortification intensity of the bridge. Then the characteristics of main bridge structure were studied using Lanzcos modal analysis method, and the seismic responses of main bridge are studied by earthquake response spectrum analysis and time history analysis respectively. The results show that the fundamental frequency of the main bridge is 0.1943Hz, and the transverse vibration mode shapes are most remarkable in the former 10 ordered types of vibration of main bridge. The main bridge is in the conditions of elastic range and does not failure under E1 earthquake. Both response spectrum analysis and time history analysis show that the largest displacement along the main bridge appears at the top of pier and the largest transverse displacement appears in the central position of main span. It also shows that the maximum shear and maximum moment occur at the bottom of main pier.

Strategy of scaled modeling for underwater shaking table tests on cylindrical marine structures under coupled earthquake and wave–current action: A review

“…Seismic damage to piers and piles is the main cause of bridge collapse and the FSI even poses a higher threat to the safety of structures under earthquake excitations. 52 Therefore, it is of great significance to carry out thorough experimental investigations on bridge piers under earthquakes considering the FSI. 3,53 However, it is difficult to design a scaled pier model which satisfies both structural and hydrodynamic similarity since the density of water is almost impossible to be "scaled" in the model.…”

“…Seismic damage to piers and piles is the main cause of bridge collapse and the FSI even poses a higher threat to the safety of structures under earthquake excitations 52 . Therefore, it is of great significance to carry out thorough experimental investigations on bridge piers under earthquakes considering the FSI 3,53 .…”

Exceeding probability analysis for rail of high-speed railway under seismic excitations

“…Indeed, there is a scarcity of studies evaluating the exceeding probability of the earthquake-induced displacement of the rail exceeding the allowable standard, in contrast to the extensive research on the vulnerability analysis of other components in the HSR trackbridge system (Jin et al, 2016;Cheng et al, 2020;Wei et al, 2022;Liang, Yan, Zhao, Wang, & Zang, 2022), along with other structures (Xiao, 2013;Zhang, 2014;Liang, Zhu, Zhu, Du, & Wang, 2021;Lv, Su, & Zhou, 2012;Ding, Zi, Ji, Shi, & Ren, 2020). For instance, the vulnerability of the bridge (Cheng et al, 2020;Wei et al, 2022;Liang et al, 2022), ballastless track structure (Wei et al, 2022) and wheels uplift from the rail (Jin et al, 2016) have been extensively investigated.…”

Exceeding Probability of Earthquake-Induced Dynamic Displacement of Rail Based on Incremental Dynamic Analysis

“…However, few studies have evaluated the probability of the earthquake-induced displacement of the rail exceeding the allowable standard, compared to the wealth of research on the vulnerability analysis of other components of the high-speed railway trackbridge system [15,[20][21][22] and other structures [23][24][25][26][27]. In the field of high-speed railway track-bridge systems, researchers mainly investigate the vulnerability of the bridge [20,22], the component of the ballastless track structure [21], and the uplift of wheels from the rail [15].…”