Article
Engineering, Civil
Javier Canada Perez-Sala, Ana M. Ruiz-Teran
Summary: Precast Concrete Segmental Bridges are a mature alternative for bridge construction, with significant advantages in the construction process. This study proposes a new Finite Element model for Precast Concrete Segmental Bridge decks, which can accurately replicate their behavior at a lower computational cost. The model shows good agreement with existing experimental results. The modeling strategy for joints greatly impacts the behavior of the model, while the consideration of friction in external tendons has limited relevance. The presence of epoxy at the joints does not seem to significantly affect the model's behavior. Shell elements combined with the proposed joint modeling strategy offer better accuracy and lower computational time compared to existing models.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Civil
Dan Zhang, Guowei Ma, Jingyuan Guan, Li Wang, Qiang Wang
Summary: This research proposes a 3D printed concrete permanent formwork of composite unbonded post-tensioned precast segmental concrete (3DPCPSC) column. The hysteresis performance and failure mode of the column are studied and compared with precast segmental reinforced concrete (PSRC) columns. Two interface enhancement methods are proposed, and their effects on the performance of 3DPCPSC columns are investigated. The pouring and vibration load of the 3D printing concrete formwork are also analyzed using finite element modeling.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Civil
Shuyou Xue, Hong Hao, Yifei Hao
Summary: This study examines the influence of impact locations and the effectiveness of different strengthening techniques on the performance of precast concrete segmental columns (PCSC) under lateral impacts. SMA ED bars are found to reduce residual displacement effectively, while mild steel ED bars have better energy absorption ability. The response of PCSC is impact location dependent, and different strengthening approaches are needed for segmental and joint impacts.
ENGINEERING STRUCTURES
(2021)
Article
Construction & Building Technology
Zhi-Peng Chen, Songye Zhu
Summary: This study proposes a novel shape memory alloy (SMA)-based self-centering precast segmental concrete column (PSCC), called SSC-PSCC. By using SMA bolts and steel angles, SSC-PSCC exhibits desirable self-centering and energy dissipation capacities, simplifying the construction and repair process. The behavior of SSC-PSCC is systematically studied and verified through finite element models, showing good performance. Compared with traditional post-tensioning-based segmental concrete columns, SSC-PSCC has advantages of easy construction, quick repair and replacement of energy dissipation elements after earthquakes.
STRUCTURAL CONTROL & HEALTH MONITORING
(2022)
Article
Green & Sustainable Science & Technology
Quoc To Bao, Kihak Lee, Sung-Jig Kim, Jiuk Shin
Summary: A hybrid concrete wall, consisting of traditional reinforced concrete wall and post-tensioned technology, has advantages in resisting lateral forces caused by earthquake loading. By incorporating various material models, the behavior of the post-tensioned reinforced concrete wall under seismic load can be explored. The effects of post-tensioned bars on the lateral resisting capacities of precast concrete shear wall were estimated using validated finite element models.
Article
Construction & Building Technology
Hussein M. Elsanadedy
Summary: The research aims to increase the progressive collapse robustness of precast buildings by revising existing precast simple shear beam-column connections and developing new precast moment connections. The study recommends the newly developed precast moment connection with the highest rotational ductility to diminish the potential of progressive collapse in precast concrete buildings.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Metallurgy & Metallurgical Engineering
Zou Shuang, Wenliuhan Hei-sha, Mao Yong-ping, Yu Bi-peng, Zhang Chong-bin
Summary: The seismic performance of grouted sleeve connected pier and prestressed precast segmental concrete pier were compared in terms of failure mechanism, bearing capacity, ductility, stiffness and energy dissipation capacity. The results showed that the grouted sleeve connected pier exhibited better seismic performance with larger stiffness and energy dissipation capacity.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2022)
Article
Engineering, Civil
Dan Zhang, Yuang Chen, Chen Zhang, Guixiang Xue, Junfei Zhang, Mo Zhang, Ling Wang, Ning Li
Summary: Our research group developed machine learning models to predict the seismic performance of precast segmental self-centering concrete-filled steel tube (PSCFST) bridges. The Conv1D-LSTM model outperformed XGBoost and Random forest regression (RFR) models in accurately predicting the acceleration response of PSCFST bridges.
ENGINEERING STRUCTURES
(2023)
Article
Construction & Building Technology
Jianwei Zhang, Xinyi Tao, Juan Liu, Hongying Dong, Wanlin Cao
Summary: The study focused on a semi-precast high-strength recycled aggregate concrete column with high-strength reinforcement, discussing design parameters and test results. The seismic performance of the semi-precast columns was comparable to cast-in-situ columns, and the selection of core column diameter should be based on practical engineering requirements.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Engineering, Civil
Amr M. A. Moussa, Mohamed F. M. Fahmy, Zhishen Wu
Summary: This study introduces an innovative resilient system for precast segmental reinforced concrete bridge columns, where a well-designed inner column ensures limited damage, controlled increase in lateral resistance, acceptable energy dissipation capacity, and required resilience after successive earthquakes.
ENGINEERING STRUCTURES
(2021)
Article
Construction & Building Technology
Hao Li, Wei Zhou
Summary: This study assessed the fragility and collapse mechanisms of multistory precast concrete parking structures by considering the variation of several structural parameters. A probabilistic analysis based on fragility curves was used to evaluate the influence of these parameters on seismic performance. The results showed that the variation of these parameters significantly affected the seismic response and fragilities of precast concrete parking structures.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Construction & Building Technology
Minsheng Guan, Jiaguo Xiao, Ying Wang, Yu Zhang, Zhuanqun Liang, Zhichao Lai
Summary: This study proposed and experimentally investigated an innovative partially precast steel reinforced concrete (PPSRC) beam-column connection for seismic performance. Four full-scale specimens were designed and tested under cyclic loads, considering axial compression ratio, concrete type, and connection type. The test results discussed failure modes, strength, stiffness, degradation, energy dissipation, and ductility. The proposed connection effectively shifted the plastic hinge location away from the joint interface and exhibited higher strength, better ductility, and greater energy dissipation capacity compared with the monolithically cast connection. The addition of steel fibers controlled crack propagation and enhanced connection performance, while higher axial load increased joint brittleness.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2023)
Article
Engineering, Civil
Guo-Jue Wang, Shi-Yong Jiang, Guo-Tao Wang, Jason M. Ingham
Summary: In order to improve the seismic performance and reduce construction cost, an "intermediate connection" technique was proposed for precast concrete frames. Numerical simulations and analysis were conducted to study the effect of intermediate connections using validated modeling methods. Fragility functions were derived using Incremental Dynamic Analysis and a probabilistic approach, and cost analysis was conducted to evaluate the feasibility of the improvements for precast concrete frames with grouted sleeves.
Article
Construction & Building Technology
Haider M. Al-Jelawy, Kevin R. Mackie
Summary: This paper presents a three-dimensional fiber-based model for reliable and robust numerical modeling of RC columns under lateral load. The model includes explicit representation of bond-slip behavior at the column-footing interface and at the interface between bars and mechanical couplers. Extensive experimentation was conducted to calibrate the model, and it was verified using large-scale RC columns.
JOURNAL OF STRUCTURAL ENGINEERING
(2022)
Article
Construction & Building Technology
Zeyang Sun, Yunlou Sun, Yi Zheng, Kentaro Iwashita, Jian Zhang, Gang Wu
Summary: The poor corrosion resistance of steel bars limits the potential application of precast concrete structures. A promising solution is the use of steel-fiber reinforced polymer (FRP) composite bars (SFCBs) as reinforcements. This paper describes a quasi-static test conducted on precast concrete columns reinforced with bundled SFCBs (PCC-B-SF). The results show that increasing the number of bars in each bundle leads to higher deformation capacity, energy ductility, and self-centering ability, although there may be a negative impact on energy dissipation.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Engineering, Civil
Zhan-Yu Bu, Yu-Chen Ou, Jian-Wei Song, George C. Lee
JOURNAL OF BRIDGE ENGINEERING
(2016)
Article
Engineering, Civil
Zhan-Yu Bu, Yu-Chen Ou, Jian-Wei Song, Na-Si Zhang, George C. Lee
JOURNAL OF BRIDGE ENGINEERING
(2016)
Correction
Construction & Building Technology
Zhan-Yu Bu, Yu-Chen Ou
ADVANCES IN STRUCTURAL ENGINEERING
(2013)
Article
Construction & Building Technology
Zhan-Yu Bu, Yu-Chen Ou
ADVANCES IN STRUCTURAL ENGINEERING
(2013)
Article
Engineering, Civil
Z. Y. Bu, Y. Ding, J. Chen, Y. S. Li
STRUCTURAL ENGINEERING AND MECHANICS
(2012)
Proceedings Paper
Engineering, Mechanical
Zhanyu Bu, Xu Xie, Yong Ding
INTELLIGENT STRUCTURE AND VIBRATION CONTROL, PTS 1 AND 2
(2011)