Article
Construction & Building Technology
Weichen Xue, Qian Huang, Jialin Yang, Zhijie Li
Summary: The structural behavior of precast concrete shear walls relies heavily on their vertical connections. Current practice utilizes two-row connections, but reducing the number of vertical connections could be a cost-effective solution. Reversed cyclic tests were conducted on seven shear wall specimens using different connection layouts, and the results showed that shear walls with reduced connections had similar load carrying capacity and higher displacement ductility coefficients compared to monolithic walls.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Construction & Building Technology
Zhiqiang Wang, Chengjun Wu, Hongya Qu, Wei Xiao
Summary: Finite element analysis is conducted to study an improved grouted corrugated duct (GCD) connection design with a reserved recess in bridge footing. The study aims to understand the damage progression mechanism and evaluate the contribution of each component in the improved design. Numerical models based on experimental results are created, validated, and calibrated. The results show that the confining effect provided by the recess sidewall maintains the integrity of the connection and prevents early deformation and crack development. Parametric study is carried out to investigate the effect of recess details on the mechanical behavior. Recommendations for the design of recess depth, mortar cushion thickness, recess diameter, and mortar strength are proposed.
Article
Construction & Building Technology
De-Hao Qiao, Yu-Qing Xu, Xu Zhang, Jia-Bao Pang, Kang Liu, Shao-Jie Wang
Summary: Through experimental and analytical studies on inverted exposed grouted sleeve (IEGS) column base joint specimens, it was found that increasing the section size of the column can significantly improve the bearing capacity of the specimen, and using high strength cement-based grouting material can enhance the yield load and peak load of the specimen. In addition, the finite element analysis simulation yielded consistent results with the experimental data, demonstrating the effectiveness of the simulation analysis.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Engineering, Geological
Lorenzo Hofer, Mariano Angelo Zanini, Flora Faleschini, Klajdi Toska, Carlo Pellegrino
Summary: The paper presents the results of an experimental investigation on the cyclic behavior of a column-to-foundation joint for precast concrete elements. The results show that precast joints exhibit similar hysteretic behavior, energy dissipation, and ductility values compared to cast-in-place specimens with the same geometric characteristics.
BULLETIN OF EARTHQUAKE ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Saiyang Zhuo, Teng Tong, Gan Lu, Weiding Zhuo, Zhao Liu, Jingzhi Huang
Summary: Due to limited knowledge about the seismic performance, the application of precast segmental two-column bents is restricted in high-seismicity regions. In this study, the seismic performance of precast segmental two-column bents was investigated, focusing on the connection of grouted splice sleeves and grouted central tenon, namely the proposed GSS-GCT connection. The GSS-GCT connection demonstrated significant improvements in lateral load-carrying capacity, displacement ductility, energy dissipation capacity, and residual displacement under high seismic activities.
APPLIED SCIENCES-BASEL
(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
Engineering, Civil
Zhiqiang Wang, Chengjun Wu, Tiantian Li, Wei Xiao, Hongyi Wei, Hongya Qu
Summary: This study introduced a new design of the grouted corrugated duct connection (GCDC), which improves the structure integrity, bond strength, and ease of constructability. Experimental results showed that a connection length of 30 times the rebar diameter would guarantee the bond strength. The behavior of the precast column was similar to that of the cast-in-place column.
JOURNAL OF EARTHQUAKE ENGINEERING
(2022)
Article
Engineering, Civil
Mengjia Ding, Weibing Xu, Jin Wang, Yanjiang Chen, Xiuli Du, Rong Fang, Xiaomin Huang, Hang Sun
Summary: This study verifies the development and damage process of prefabricated concrete columns with grouted sleeves (PCC-GS) through finite element analysis, and proposes a simplified calculation model for the plastic hinge length of PCC-GS, which helps accurately calculate the PHL of PCC-GS considering various influencing factors.
Article
Chemistry, Multidisciplinary
Cristhian Ramirez Ortiz, Gilberto Areiza Palma, Albio D. Gutierrez Amador, Jose L. Ramirez Duque, Ruth E. Cano Buitron, Luis F. Gonzales Escobar
Summary: This paper investigates the seismic behavior of a steel beam-to-concrete-filled steel tubular column connection with external diaphragms. The results indicate that this connection exhibits good ductility and dissipation capacity, meeting the design requirements for earthquake resistance.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Civil
Hua Huang, Ming Li, Wei Zhang, Yujie Yuan
Summary: This paper proposes a replaceable friction-type artificial plastic hinge (FAPH) for connecting prefabricated concrete members. Experimental results show that this connection method has better hysteresis performance and bearing capacity, and its seismic performance can be improved by adjusting parameters.
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING
(2022)
Article
Engineering, Civil
Xianzhuo Jia, Sibo Su, Kun Xu, Xiao Liang, Jinzhao Jin, Qiang Han
Summary: The seismic behavior of high-strength centrifugally prefabricated reinforced concrete pipe columns in a practical engineering project is studied through three 1:2 large-scale quasi-static tests. The influence of axial compression ratio and section form on the performance is evaluated. A modification to one of the most widely used confined concrete models is proposed based on the confinement effect in the high-strength centrifugally prefabricated RC hollow pipe columns. Its accuracy is verified by numerical analysis.
ENGINEERING STRUCTURES
(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
Engineering, Geological
Xiaopeng Li, Guangda Zhang, Qiang Han, Junlong Zhou, Xiaomin Liu, Xiuli Du
Summary: Grouted sleeves are widely used in accelerated bridge construction and splice joints. This study investigates the mechanical behavior of splice joints under seismic loads and provides information on damage mode, force, and deformation ability. The inner failure at the joint surface and bond-slip between steel and grout are examined. Finite element and computational models are developed to understand the damage mechanism and predict the force-displacement behavior of splice joints, aiding in seismic design of structures.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2023)
Article
Construction & Building Technology
Cristhian Ramirez Ortiz, Albio D. Gutierrez Amador, Jose L. Ramirez Duque
Summary: The seismic behavior of a novel steel beam-to-concrete-filled steel tubular column connection with external diaphragms was evaluated using a finite element method model. The model was validated with experimental results and found suitable for use in high seismic threat areas. A monotonic test was used to qualify the connection and the model underwent two stages of simplifications to reduce computational time. The simplified model was used in a parametric study and all profiles met seismic performance requirements.
Article
Construction & Building Technology
Jin Xia, Jie-jing Chen, Kuangyi Shan, Yi-fan Wu
Summary: Steel corrosion in prefabricated concrete structures can lead to degradation in seismic performance. This study investigated the impact of corrosion on seismic performance using accelerated corrosion, quasi-static cyclic experiments, and numerical simulation. The results showed that increasing corrosion levels significantly decreased the bearing capacity and cumulative energy dissipation capacity of the structures.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Construction & Building Technology
De-Cheng Feng, Xu-Yang Cao, Ding Wang, Gang Wu
Summary: A non-parametric seismic fragility assessment framework based on PDEM is proposed in this paper, which can effectively evaluate the structural response under earthquake excitation and achieve higher accuracy than the classic parametric LRM method with fewer dynamic calculations.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Computer Science, Interdisciplinary Applications
Yan-Ping Liang, De-Cheng Feng, Xiaodan Ren, Jie Li
Summary: This study proposes a three-stage method for simulating non-Gaussian fields over manifolds. The original manifold is first dimensionally reduced to a Euclidean domain, and then the underlying Gaussian field is simulated over the Euclidean domain using conventional representations. Finally, an enhanced translation procedure is used to convert the Gaussian field to the target non-Gaussian field over the manifold. The method's applicability and accuracy are demonstrated through simulations and error analysis.
COMPUTER-AIDED CIVIL AND INFRASTRUCTURE ENGINEERING
(2023)
Article
Engineering, Civil
Yan-Ping Liang, Xiaodan Ren, De-Cheng Feng
Summary: This study investigates an actual super large cooling tower under strong wind using the finite element analysis method and proposes a three-stage non-Gaussian random field representation to characterize the spatial variability of material properties. The results show that the spatial variability of material properties does not affect the wind-induced failure mode of the cooling tower, but it does affect the ultimate capacity.
JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS
(2023)
Article
Engineering, Civil
Haowei Zhang, Kang Gao, Huiying Huang, Shitong Hou, Jun Li, Gang Wu
Summary: This paper proposes a fully decouple convolutional neural network with an anchor-free mechanism for non-destructive identification of structures with internal damages. Two 3D cylinder IoU optimization and evaluation algorithms are designed to improve model training effect and estimate model performance. Datasets of random damages of rebars in RC beams are established based on the secondary development of ABAQUS to overcome the challenges of time consumption and difficulty in dataset generation and preparation. The presented model achieves high accuracy and outperforms traditional coupled networks, showing its potential for internal damage detection in other components and providing a new idea for the internal non-destructive health monitoring of prefabricated structures.
ENGINEERING STRUCTURES
(2023)
Article
Construction & Building Technology
De-Cheng Feng, Yue Li, Abdollah Shafieezadeh, Ertugrul Taciroglu
JOURNAL OF STRUCTURAL ENGINEERING
(2023)
Article
Construction & Building Technology
De-Cheng Feng, Xin Chen, Frank McKenna, Ertugrul Taciroglu
Summary: Both integral and implicit gradient formulations are developed for a force-based beam element with material and geometric nonlinearities. The proposed element accurately captures both material and geometric nonlinearities, and offers consistent response predictions for any number of integration points due to its nonlocal regularization.
JOURNAL OF STRUCTURAL ENGINEERING
(2023)
Article
Engineering, Mechanical
Xu-Yang Cao, De-Cheng Feng, Yue Li
Summary: This paper performs a probabilistic assessment of structures under non-stationary stochastic ground motions using different seismic fragility analysis approaches. Four commonly used PSFA approaches are adopted and compared. The paper discusses the demand distributions and fragility curves under different limit states for all approaches. It recommends the non-parametric KDE approach for estimating the univariate distribution and suggests the LSR approach for efficient data processing and general trend assessment, the MLE approach for smaller response thresholds and slighter damage conditions, and the KDE approach for larger response thresholds and severer damage conditions. The paper provides insights into the accuracy and applicability of various PSFA approaches and offers a basis for linking probabilistic hazard and risk analyses for performance assessment in future research.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Engineering, Civil
Junwei Ren, Quanbiao Xu, Gang Chen, Xiaodong Yu, Shunfeng Gong, Yong Lu
Summary: This paper presents a systematic evaluation of the seismic behavior of pretensioned centrifugal spun concrete piles with steel strands (PSC piles) using full-scale tests and finite element simulation. The results show that PSC piles have increased lateral bearing capacity and decreased deformation capacity with an increase in axial force ratio. PSC piles with a smaller reinforcement ratio demonstrate better overall seismic performance, especially ductility, under low to medium axial force ratios.
Article
Engineering, Civil
De-Cheng Feng, Xin-Mao Sun, Yue Li, Gang Wu
Summary: This paper proposes a multiparameter-based damage measure (mDM) index to assess the postearthquake performance of reinforced concrete structures. The mDM, using two parameters, captures the overall structural performance by reflecting both the deformation capacity and repairability. The fragility analysis of different structures demonstrates that mDM provides a more comprehensive assessment of postearthquake performance, considering both maximum and residual displacements.
ASCE-ASME JOURNAL OF RISK AND UNCERTAINTY IN ENGINEERING SYSTEMS PART A-CIVIL ENGINEERING
(2023)
Article
Engineering, Civil
Xu-Yang Cao, De-Cheng Feng, Michael Beer
Summary: A consistent seismic hazard and fragility framework considering the uncertainties of capacity and demand is proposed, integrating the probability density evolution method (PDEM) into performance-based earthquake engineering (PBEE). The study introduces a non-stationary stochastic earthquake model using spectral representation of random functions, reflecting the real characteristics of ground motions. Comparisons with four classic approaches verify the accuracy and efficiency of the proposed framework.
Article
Instruments & Instrumentation
Weihao Sun, Shitong Hou, Jianhua Fan, Gang Wu, Fengbo Ma
Summary: This study proposes an ultrasonic computed tomography method for detecting internal defects in underwater concrete piers. The effectiveness of the method is validated through numerical simulation and underwater experiments, and it is found that certain conditions lead to better detection results for underwater concrete piers.
SMART MATERIALS AND STRUCTURES
(2023)
Article
Engineering, Mechanical
Shi-Zhi Chen, Shu-Ying Zhang, De-Cheng Feng, Ertugrul Taciroglu
Summary: Machine learning-based data-driven approaches are increasingly important for predicting structural performance. These approaches can learn hidden patterns in experimental databases and sometimes outperform mechanics-based predictive models. However, there is often a gap between the collected data and the desired prediction domain. To address this issue, a new data-driven approach called PkeDA, which integrates prior knowledge embedded in empirical formulas, is proposed. It has been shown to have excellent interpolation and extrapolation capabilities in predicting the bending capacities of reinforced concrete beams.
JOURNAL OF ENGINEERING MECHANICS
(2023)
Article
Engineering, Civil
Shi-Zhi Chen, Qiang-Ming Zhong, Shu-Ying Zhang, Gan Yang, De-Cheng Feng
Summary: Recently, bridge weigh-in-motion (B-WIM) technology has been essential in bridge management and maintenance. A study was conducted to investigate the performance of B-WIM methods considering the spatial variation of material characteristics, including random field representation and various parametric analyses. Numerical simulations showed that the spatial variability of material properties has a limited impact on the performance of typical B-WIM methods, with a maximum discrepancy of recognition accuracy of less than 5%.
ASCE-ASME JOURNAL OF RISK AND UNCERTAINTY IN ENGINEERING SYSTEMS PART A-CIVIL ENGINEERING
(2023)
Proceedings Paper
Engineering, Mechanical
Xiaobang Zhang, Yong Lu
Summary: This paper investigates the tolerance of a wavelet packet energy with neural network approach to uncertainties in the input excitations and measurement noises. The results demonstrate that the method is workable for detecting structural changes with good accuracy, given a reasonably controlled impact test.
MODEL VALIDATION AND UNCERTAINTY QUANTIFICATION, VOL 3
(2023)
Proceedings Paper
Engineering, Civil
Yu Gu, Yong Lu
Summary: Composite structures are widely used in bridge and building construction. However, existing damage identification literature often fails to accurately distinguish between flexural and shear link damages in composite structures. This paper discusses the effects of these damages on the overall structural stiffness of a composite beam and proposes a method to identify these damage parameters using vibration test data.
DYNAMICS OF CIVIL STRUCTURES, VOL 2
(2023)
Article
Engineering, Civil
Renbing An, Jiacong Yuan, Yi Pan, Duhang Yi
Summary: Traditional timber structures built on sloped land are more susceptible to seismic damage compared to structures built on flat land. The upper portion of the structure is found to be the weak point on sloped land, with potential issues such as tenon failure and column foot sliding.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Elyas Bayat, Federica Tubino
Summary: The current design guidelines for assessing floor vibration performance do not consider the influence of variability in the walking path on the dynamic response of floors. This study investigates the dynamic response of floors under a single pedestrian walking load, taking into account the randomness of the walking path and load. The effectiveness of the current guidelines in predicting floor response is critically assessed.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Gao Ma, Chunxu Hou, Hyeon-Jong Hwang, Linghui Chen, Zhenhao Zhang
Summary: Minimizing earthquake damage and improving repair efficiency are the main principles of resilient structures. This study proposed a repairable column with UHPC segments and replaceable energy dissipaters. The test results showed that the columns with UHPC segments and replaceable dissipaters exhibited high strength, deformation capacity, and energy dissipation.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Kartheek S. M. Sonti, Pavan Kumar Penumakala, Suresh Kumar Reddy Narala, S. Vincent
Summary: In this study, the compressive behavior of alumina hollow particles reinforced aluminum matrix syntactic foams (AMSF) was investigated using analytical, numerical, and experimental methods. The results showed that the FE solver ABAQUS could accurately predict the elastic and elastio-plastic behavior of AMSFs. The study also suggested that FE models have great potential in developing new materials and composites under compression loading.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Zheqi Peng, Xin Wang, Zhishen Wu
Summary: In this study, the statistical modeling of fiber-reinforced polymer (FRP) cables using the classic fiber bundle model is explored. The study considers important features of large-scale multi-tendon FRP cables, such as initial random slack and uneven tensile deformation among tendons. A parametric study and reliability analysis are conducted to predict the load-displacement relation and design thousand-meter-scale FRP cables. The study emphasizes the relation between the reliability index beta of the cable and the safety factor gamma of the FRP material.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Yanchao Shi, Shaozeng Liu, Ye Hu, Zhong-Xian Li, Yang Ding
Summary: This paper introduces a damage assessment method for reinforced concrete (RC) columns under blast loading, using modal parameter measurement as the evaluation index. The validity of the proposed method is validated through numerical and experimental analysis. The results show that this modal-based damage assessment method is applicable for non-destructive evaluation of blast-induced damage of RC columns.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Xiaolin Zou, Maosheng Gong, Zhanxuan Zuo, Qifang Liu
Summary: This paper proposes an efficient framework for assessing the collapse capacity of structures in earthquake engineering. The framework is based on an accurate equivalent single-degree-of-freedom (ESDOF) system, calibrated by a meta-heuristic optimization method. The proposed framework has been validated through case studies, confirming its accuracy and efficiency.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Jie Hu, Weiping Wen, Chenyu Zhang, Changhai Zhai, Shunshun Pei, Zhenghui Wang
Summary: A deep learning-based rapid peak seismic response prediction model is proposed for the most common two-story and three-span subway stations. The model predicts the peak seismic responses of subway stations using a data-driven approach and limited information, achieving good predictive performance and generalization ability, and demonstrating significantly higher computational efficiency compared to numerical simulation methods.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Jin Ho Lee, Jeong-Rae Cho
Summary: A simplified model is proposed to estimate the earthquake responses of a rectangular liquid storage tank considering the fluid-structure interactions. The complex three-dimensional structural behavior of the tank is represented by a combination of fundamental modes of a rectangular-ring-shaped frame structure and a cantilever beam. The system's governing equation is derived, and earthquake responses such as deflection, hydrodynamic pressure, base shear, and overturning moment are obtained from the solution.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
W. J. Lewis, J. M. Russell, T. Q. Li
Summary: The work discusses the key features and advantages of optimal 2-pin arches shaped by statistically prevalent load and constant axial stress. It extends the design space of symmetric arches to cover asymmetric forms and provides minimum values of constant stress for form-finding of such arches made of different materials. The analysis shows that constant stress arches exhibit minimal stress response and have potential implications for sustainability and durability of future infrastructure.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Wen-ming Zhang, Han-xu Zou, Jia-qi Chang, Tian-cheng Liu
Summary: Saddle position is crucial in the construction and control of suspension bridges. This study proposes an analytical approach to estimate the saddle positions in the completed bridge state and discusses the calculation under different definitions. The relationship between the saddle position and the tower's centerline is analyzed, along with the eccentric compression of the tower. The feasibility of the proposed method is verified through a real-life suspension bridge.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Shaise K. John, Alessio Cascardi, Yashida Nadir
Summary: This study experimentally investigated the use of TRM material for reinforcing concrete columns. The results showed that increasing the number of textile layers effectively increased the axial strength. Additionally, the choice of fiber type and hybrid textile configuration also had a significant impact on strength improvement. A new design model that considers the effects of both the confining matrix and textile was proposed.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Chandrashekhar Lakavath, S. Suriya Prakash
Summary: This study experimentally investigated the shear behavior of post-tensioned UHPFRC girders, considering factors such as prestress level, fiber volume fraction, and types of steel fibers. The results showed that increasing prestress and fiber dosage could enhance the ultimate load-carrying capacity of the girders, reduce crack angle, and increase shear cracking load.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Vahid Goodarzimehr, Siamak Talatahari, Saeed Shojaee, Amir H. Gandomi
Summary: In this paper, an Improved Marine Predators Algorithm (IMPA) is proposed for size and shape optimization of truss structures subject to natural frequency constraints. The results indicate that IMPA performs better in solving these nonlinear structural optimization problems compared to other state-of-the-art algorithms.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Chun-Xu Qu, Jin-Zhao Jiang, Ting-Hua Yi, Hong-Nan Li
Summary: In this paper, a computer vision-based method is proposed to monitor the deformation and displacement of building structures by obtaining 3D coordinates of surface feature points. The method can acquire a large number of 3D coordinates in a noncontact form, improve the flexibility and density of measurement point layout, and is simple and cost-effective to operate.
ENGINEERING STRUCTURES
(2024)