Article
Engineering, Civil
Van-Bang Phung, Norman A. Abrahamson, Bor-Shouh Huang, Chin Hsiung Loh
Summary: A ground motion prediction equation (GMPE) has been developed for estimating vertical ground motion amplitudes for crustal earthquakes in Taiwan. The GMPE provides median and standard deviations of peak ground acceleration (PGA) and pseudo spectral acceleration response ordinates for the spectral period of 0.01-10 s. The study reveals significant nonlinear site effects in the period of about 0.2-0.5 s for the vertical component.
EARTHQUAKE SPECTRA
(2022)
Article
Green & Sustainable Science & Technology
Keyu Wan, Xiaodan Sun, Yu Liu, Kang Ren, Xiaoying Sun, Yanqing Luo
Summary: This study investigates the impact of focal mechanism on the spatial coherencies of ground motions by simulating near-field ground motions. A proposed coherency model based on the focal mechanism is also introduced.
Article
Engineering, Geological
Zhanxuan Zuo, Maosheng Gong, Kunyang Wang, Jing Sun
Summary: This research investigates the seismic performance of an RC frame under both horizontal ground motions and vertical ground motions (VGMs) through a shaking table test. The test results show that the beams of the frame are heavily damaged due to the vertical load caused by VGMs, with the beams on the second floor experiencing more severe damage. The vertical acceleration amplification factor decreases as the seismic intensity increases, and the horizontal frequencies after the test are reduced.
BULLETIN OF EARTHQUAKE ENGINEERING
(2023)
Article
Engineering, Geological
Ling-Yu Xu, Cheng-Xiang Song, Wei-Yun Chen, Fei Cai, Yong-Yi Li, Guo-Xing Chen
Summary: This study investigates the effects of earthquakes on pile settlement in saturated sand deposits using finite element analysis and a dynamic model, indicating that liquefaction induced by distant earthquakes is more severe than by nearby earthquakes, and proposes a solution.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2021)
Article
Engineering, Geological
Zhiyi Chen, Peng Jia
Summary: This paper simulates the FPB at a subway station in Shanghai and studies its isolation effect and mechanism. It is found that the FPB can reduce the shear force and bending moment of central columns during earthquakes, without significantly increasing inter-layer displacement. Vertical ground motion reduces the isolation effect of the FPB, with the reduction increasing with the acceleration amplitude of the vertical ground motion.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2021)
Article
Engineering, Civil
Gopala Krishna Rodda, Dhiman Basu
Summary: This paper investigates the applicability of two frameworks based on CSD and ASD for rotational ground motion, explores spatially varying rotational ground motion for a future event, and examines the choice of representation of ASD.
JOURNAL OF EARTHQUAKE ENGINEERING
(2021)
Article
Engineering, Civil
Xiaolei Wang, Zixu Zhao, Weidong Yan, Dagang Lu, Hui Kong
Summary: This paper estimates the joint occurrence of spectral accelerations between horizontal and vertical ground motions based on the NGA-West2 ground motion database. The correlation model and joint distribution model are obtained using the CB14 horizontal ground motion prediction equation and BC16 vertical ground motion prediction equation. It is verified that the joint distribution of residuals follows a multivariate normal distribution through quantitative and qualitative validation methods. The conditional mean spectra of vertical ground motions conditioned on spectral accelerations of horizontal ground motions are studied as an application of joint occurrence.
JOURNAL OF EARTHQUAKE ENGINEERING
(2023)
Article
Engineering, Civil
Shu-Hsien Chao, Che-Min Lin, Chun-Hsiang Kuo, Jyun-Yan Huang, Kuo-Liang Wen, Yi-Hau Chen
Summary: The study proposes a methodology to simultaneously implement SC and EHVRs, or SC and MHVRs in a ground-motion prediction equation to improve the prediction accuracy of site effects, reducing the standard deviation of station-specific residuals. The methodology is illustrated by developing models based on EHVRs-SC and MHVRs-SC, showing consistency in the spatial distribution of predicted PGA terms from different ground motion sources.
EARTHQUAKE SPECTRA
(2021)
Article
Multidisciplinary Sciences
Taseef Hasan Farook, Saif Ahmed, Md Shoriful Islam Talukder, James Dudley
Summary: The current research aimed to develop a concept open-source 3D printable, electronic wearable head gear to record jaw movement parameters. The results demonstrated that the device could accurately record maxillomandibular movements in two participants, but there are limitations that need to be addressed.
Article
Multidisciplinary Sciences
Toshinobu Takahashi, Erika Okita, Daigo Yamamoto, Yasunao Okamoto, Akihisa Shioi
Summary: The phenomenon of generating horizontal rotation of a gear motor through vibration of granular matter is reported. The direction of rotation depends on factors such as granule diameter, vibration frequency, and vertical motion allowed for the gear. Despite its complexity, this dependency is deterministic as it is determined by the motion of the granular matter.
SCIENTIFIC REPORTS
(2021)
Article
Engineering, Geological
Chenxi Li, Duofa Ji, Changhai Zhai, Yuhong Ma, Lili Xie
Summary: A deep learning-based ground motion model is developed in this study to predict the vertical component of ground motions. Comparative assessments with existing models show that the proposed model has better predictive power and captures important physical features.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2023)
Article
Engineering, Geological
Giuseppe Quaranta, Giulia Angelucci, Fabrizio Mollaioli
Summary: In recent years, near-fault earthquakes have been extensively studied with a focus on the pulse-like horizontal seismic ground motion and its effects on structural systems. However, less attention has been paid to the vertical component of ground motion in such seismic events. This study investigates a overlooked case of near-fault earthquakes that exhibit a pulse-like seismic ground motion in both the horizontal and vertical directions. The results show that the ratio of pulse periods in the horizontal and vertical components is correlated with the pulse period along the fault-normal direction, but not with the pulse period along the vertical direction. It is also found that the maximum displacement of elastomeric bearings subjected to a pulse-like horizontal ground motion is moderately amplified when the vertical excitation is also pulse-like.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2022)
Article
Engineering, Geological
Jin-Dou Cai, Jing-Yan Lan, Xiang-Yu Liu, Hong-Yi Ren, Gan-Ling Xian
Summary: This study replaces the traditional periodic diagram method with the multidimensional autoregressive (AR) model to compute the ground motion coherence coefficients. The results show that the AR model can accurately reconstruct strong motion acceleration records and provide smoother coherence coefficients compared to the periodic diagram method. The AR model is also more effective in reflecting the importance of higher-order modes on site amplification in multidimensional tunnel sites.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2023)
Article
Engineering, Civil
Mohammad Yazdi, John G. Anderson, Ramin Motamed
Summary: This article presents a HVSR-based model to reduce the uncertainties of site effects in the Next Generation Attenuation (NGA)-West2 GMMs. By incorporating the HVSR and the site-term residual in the NGA-West2 database, the site-to-site variability can be consistently reduced, leading to a decrease in the total standard deviation.
EARTHQUAKE SPECTRA
(2023)
Article
Geochemistry & Geophysics
Xiao-Lei Wang, Xi-Ming Wang, Wei-Dong Yan, Da-Gang Lu
Summary: This study examined the empirical correlations among horizontal and vertical ground-motion intensity measures and developed prediction models for the correlation coefficients. The results showed moderate correlations between the same intensity measures of horizontal and vertical ground motions. The correlation coefficient models provide a theoretical basis for selecting ground motions using generalized conditional intensity measure.
BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA
(2023)
Article
Engineering, Civil
Li Xu, Jinlong Pan, Li Guo
Summary: This study investigates the mechanical performance and properties of precast reinforced concrete (RC) columns with grouted sleeves (GS) connections using finite-element analysis. The plastic hinge lengths and rotations due to bond slip in precast RC columns were found to be significantly different from those in cast-in-place RC columns. The plastic hinge lengths and rotations were affected by several parameters.
ENGINEERING STRUCTURES
(2022)
Article
Construction & Building Technology
Bo Jiang, Zhenxu Qian, Jinlong Pan
Summary: This study aims to reduce the drying shrinkage of Engineered Cementitious Composites (ECC) and investigate the significance of curing method in ECC with additives. The results indicate that the addition of expansive agent reduces the compressive strength of ECC, but appropriate curing methods can ensure strength development and reduce the risk of cracking. This research provides valuable experimental data and suggestions for the practical application of ECC with low drying shrinkage.
MATERIALS AND STRUCTURES
(2022)
Article
Construction & Building Technology
Dawei Gu, Jinlong Pan, Mladena Lukovic, Jixuan He
Summary: The study found that FRP-reinforced SHCC beams have higher shear carrying capacity and better ductility through four-point bending tests. The shear span to effective depth ratio and stirrup ratio have significant effects on the shear behavior of FRP-reinforced SHCC beams.
STRUCTURAL CONCRETE
(2022)
Article
Construction & Building Technology
Jinsheng Han, Jinlong Pan, Jingming Cai
Summary: This paper investigates the application of self-sensing high ductility cementitious composite (HDCC) in structural health monitoring. A carbon fiber reinforced HDCC with the addition of nano-carbon black and carbon fiber was designed and tested under compression and tension conditions. The experimental results analyze the sensing properties and piezoresistive effect of the proposed HDCC. The findings suggest that the HDCC has high ultimate tensile strain and good electrical sensitivity and signal-to-noise ratio when the water-binder ratio is 0.3.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Cong Lu, Jinlong Pan, Baohong Luo, Zhenghao Li, Christopher K. Y. Leung
Summary: This study utilized X-ray CT scanning technique to reconstruct the flaw structure of SHCC materials and explained its tensile performance through establishing cracking strength distribution. The study found that the potential of saturated multiple cracking in SHCC materials can be evaluated using an index called eta, which provides a new approach for further design optimization.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Computer Science, Interdisciplinary Applications
Dawei Gu, Shozab Mustafa, Jinlong Pan, Mladena Lukovic
Summary: This research proposes a mathematical method to scale the reinforcement-concrete bond-slip relationship in a beam lattice modeling framework. By using stochastic analysis and a simplified generalized approach, the interaction between the reinforcing bar and surrounding concrete can be modeled at the macroscale. The model has been validated through various pull-out tests and has shown the ability to capture the fundamental fracture mechanisms in reinforced concrete.
COMPUTER-AIDED CIVIL AND INFRASTRUCTURE ENGINEERING
(2023)
Article
Engineering, Civil
Jinlong Pan, Guanhua Li, Jingming Cai, Zhong Tao
Summary: This paper investigates the fire performance of ECC-encased CFST columns and finds that ECC provides better fire protection than conventional concrete. The ECC-encased CFST columns also exhibit improved strength and ductility after fire exposure.
ENGINEERING STRUCTURES
(2022)
Article
Construction & Building Technology
Xiaomeng Ma, Li Xu, Jingming Cai, Jinsheng Han, Weiwei Zhu, Jinlong Pan
Summary: In this paper, the properties of fire-resistive engineered cementitious composites (ECC) were systematically studied, including tensile and compression properties, dry density, heat insulation properties, and high temperature resistance. The results showed that the prepared fire-resistive ECC materials possessed favorable thermal insulation properties and adequate mechanical properties, and exhibited better high temperature stability compared to traditional cementitious fireproof materials. Small-scale fire resistance experiments demonstrated the improved fire performance of the structure. Microscopic experiments further explored the action mechanism of porous fillers on the ductility and fire performance of fire-resistive ECC materials.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Construction & Building Technology
Bo Jiang, Zhenxu Qian, Dawei Gu, Jinlong Pan
Summary: In this paper, nine groups of specimens were tested to develop high-early-strength Engineered Cementitious Composites (HES-ECC) for the effective strengthening and repair of concrete structures. The high-early-strength effect of different cement types was compared, along with their impact on the deformation ability of HES-ECC. The interfacial behaviors between HES-ECC and existing concrete were also clarified, considering the effects of interfacial agents, treatment methods, and roughness. The results show that HES-ECC mixed with 6% silica fume can achieve both high early-strength and superior long-term-deformability. The study provides valuable experimental data for promoting the application of HES-ECC in repairing existing concrete structures.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Horticulture
Yuanyuan Zhou, Zihao Li, Congtao Xu, Jinlong Pan, Haijun Zhang, Qingxiu Hu, Yajie Zou
Summary: This study investigated the potential of using corn stalks as an ingredient in substrate composition for cultivating king oyster mushroom. The results confirmed the feasibility of using corn stalks instead of sawdust and bagasse, which can not only reduce costs and improve food quality, but also improve waste utilization.
Article
Construction & Building Technology
Jingming Cai, Jinsheng Han, Feng Ge, Yuanzheng Lin, Jinlong Pan, Ang Ren
Summary: This study aimed to investigate the feasibility of developing impact-resistant mycelium-based composites (MBCs) using agricultural waste straws such as rice straw, wheat straw, and corn straw. The physical properties and performance of MBC specimens were tested and analyzed, including density, elasticity modulus, thermal conductivity, compressive strength, and impact resistance. The results showed that MBCs made from rice straw and wheat straw had higher compressive strength and impact resistance compared to those made from corn straw, attributed to the low degree of fermentation due to the flaky shape of corn straws.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Engineering, Civil
Bingqing Dong, Jinlong Pan, Li Xu
Summary: In this study, the failure mechanisms of reinforced engineered cementitious composite (RECC) ring beam joints were numerically analyzed using finite element software. The study comprehensively investigated the failure mode, load-carrying capacity, ductility, and strain distribution in the steel reinforcement. The results showed that the RECC ring beam significantly contributed to the mechanical property of the joint by improving shear strength and the strength of the core ECC through the restraint effect of circumferential reinforcement.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Civil
Jingming Cai, Jinlong Pan, Guanhua Li, Mohamed Elchalakani
Summary: This paper investigates the mechanical behaviors of ECC-encased CFST columns after fire exposure with different parameters. The concrete-encased CFST column experiences severe concrete spalling, while the ECC-encased CFST column maintains its integrity under identical fire conditions. The ECC-encased CFST column shows higher eccentric load carrying capacity and flexural stiffness compared to the concrete-encased CFST column.
ENGINEERING STRUCTURES
(2023)
Article
Construction & Building Technology
Jingming Cai, Jinlong Pan, Yuanzheng Lin, Jinsheng Han, Boyin Ding, Neven Ukrainczyk
Summary: This study aimed to investigate the effect of temperature on the low-velocity impact behaviors of engineered cementitious composite (ECC). The results showed that increasing the water-to-binder (w/b) ratio improved the tensile cracking strength and ultimate tensile strength of PVA-ECC and PE-ECC, while the ultimate tensile strain decreased. The compressive strength of PE-ECC was higher than that of PVA-ECC. The low-velocity impact tests revealed that PVA-ECC was sensitive to temperature, with the maximum load increasing and the maximum displacement decreasing as the temperature decreased. On the other hand, PE-ECC was relatively insensitive to temperature and had a higher energy-dissipation coefficient under cold environments. Therefore, PE-ECC is more applicable for use in cold environments.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2023)
Article
Construction & Building Technology
Qian Yu, Binrong Zhu, Xuesen Li, Lingqi Meng, Jingming Cai, Yamei Zhang, Jinlong Pan
Summary: The main obstacle to widespread adoption of 3D printed concrete technology is the high carbon emissions caused by heavy use of cement. Solutions include increasing coarse aggregate use or finding suitable cement substitutes. This research examines the use of steel slag as a potential substitute for cement in 3D printed concrete, evaluating its impact on rheological and mechanical properties as well as ecological impact. Results show that using up to 10% steel slag improves the buildability of 3DPC, but rheological property decreases significantly when content exceeds 20%. Incorporating 20% steel slag effectively reduces environmental impact and cost while maintaining rheological and mechanical properties in later stages. This study presents a promising solution for green and low-carbon construction using 3D printed concrete.
JOURNAL OF BUILDING ENGINEERING
(2023)
