Review
Polymer Science
Bowen Chen, Junwu Dai, Tingsu Song, Qingsong Guan
Summary: The use of high-damping rubber materials in engineering seismic isolation is limited by strong temperature dependence. The development of high-performance high-damping rubber materials is urgent and necessary to ensure the safety of engineering structures in seismic events.
Article
Chemistry, Physical
Xiaoyuan Zheng, Zhiying Ren, Liangliang Shen, Bin Zhang, Hongbai Bai
Summary: The LCDS has excellent stiffness and damping characteristics, and its performance can be effectively improved by changing material preparation and operating parameters. Vibration frequency has little effect on the damping performance of the LCDS, while MR matrix density and structural preload have a significant impact on damping performance.
Article
Engineering, Mechanical
Rilian Shao, Martin Wahle, Markus Zimmermann
Summary: This paper introduces a simple analytical friction model that accurately simulates the dynamic friction behavior of rubber-like materials on a rigid surface and validates its accuracy through experimentation. Additionally, a two-dimensional extension of the model is proposed to simulate anisotropic friction behavior, which was validated through measurements of a vehicle tire.
TRIBOLOGY INTERNATIONAL
(2021)
Article
Polymer Science
Emilio Turbay, Gilberto Martinez-Arguelles, Tatiana Navarro-Donado, Edgar Sanchez-Cotte, Rodrigo Polo-Mendoza, Elvis Covilla-Valera
Summary: This research investigates the effects of crumb rubber and warm mix asphalt additives on asphalt binder modification. The results show that crumb rubber increases the stiffness of the asphalt binder and improves its rutting resistance but decreases fatigue performance. On the other hand, warm mix technology decreases the stiffness and performance of the asphalt at high temperatures.
Review
Engineering, Civil
Seyed Ehsan Aghakouchaki Hosseini, Sherif Beskhyroun
Summary: Liquid storage tanks are critical structures for strategic industries, and damages to these tanks caused by environmental occurrences like earthquakes can have severe consequences on the reliability and stability of the tank-liquid system and related industries. Therefore, it is crucial to focus on dynamic modelling, seismic protection, vibration mitigation, and structural health monitoring techniques for these structures.
Article
Engineering, Geological
Z. Yang, Z. Lu, W. Shi, C. Wang, X. Ling, J. Li, D. Guan
Summary: This paper investigates the effects of rubber content (RC) and rubber size (d(0)) on the dynamic properties of expansive soil-rubber (ESR) through low-temperature dynamic triaxial tests. The results indicate that the shear stress of ESR decreases with increasing RC for a particle size ratio of 1.3, but decreases first and then increases for a particle size ratio of 2.4. The threshold RC between soil-like and rubber-like ESR is 10%. The maximum shear modulus ratio of ESR occurs at RC = 10% and d(0) = 0.25 mm, resulting in the best dynamic performance. The hysteretic curve of ESR is flat and elliptical, deviating upward to the right under freezing conditions. Furthermore, different contact modes between rubber and expansive soil are proposed and the contact mechanism has been revealed.
GEOSYNTHETICS INTERNATIONAL
(2023)
Article
Construction & Building Technology
Liyan Wang, Xing Xiao, Wenwei Ji, Aimable Ishimwe, Binghui Wang, Ke Sun
Summary: By mixing waste steel slag and old rubber particles into mucky clay, the MCSRA could significantly improve the engineering properties of the clay. The dynamic properties of MCSRA were found to be enhanced compared to mucky clay, with varying effects depending on steel slag content, rubber particle content, size, and confining pressure. An improved dynamic model based on the Hardin-Drnevich model was established to describe the dynamic performance of MCSRA.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Engineering, Civil
Kyeonghoon Park, Taiji Mazda, Yukihide Kajita
Summary: This study proposes a hysteretic model that accurately predicts the behavior of shear deformation of high-damping rubber bearings (HDRB) when designing seismic isolation structures. Dynamic loading tests were performed to investigate the nonlinear characteristics of HDRB, and it was found that these characteristics strongly correlate with the shear strain experienced in the past. Furthermore, a hardening phenomenon was confirmed when shear deformation exceeded a certain level. Based on experimental results, the study evaluated and analyzed the dynamic characteristics of HDRB, including equivalent stiffness, equivalent damping ratio, and strain energy. An improved bilinear HDR model was developed to reproduce the dependence on shear deformation and hardening phenomena, and an objective parameter-setting procedure based on experimental results was proposed for modeling with minimal parameters. The proposed model corresponded with experimental results within a 10% error margin.
EARTHQUAKES AND STRUCTURES
(2023)
Article
Engineering, Geological
Kazem Fakharian, Ali Ahmad
Summary: The study shows that adding granulated rubber decreases shear modulus and increases damping ratio of granulated rubber-sand mixtures, while also helping to reduce the degradation rate of shear modulus. Anisotropic consolidation has little effects on the variations of shear modulus and damping ratio of sand-rubber mixtures.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2021)
Article
Engineering, Civil
Yuqing Tan, Ji Dang, Akira Igarashi, Takehiko Himeno, Yuki Hamada
Summary: There are concerns about the effects of low temperature on the hysteresis performance of High Damping Rubber (HDR) bearings used as seismic isolation devices for bridges in cold regions. The stiffness and damping ratio of the bearings increase at lower temperatures, but decrease as the temperature inside the bearing rises due to self-heating of the rubber material under cyclic loading. A new simplified thermo-mechanical coupled hysteretic restoring force model of HDR bearings is developed and validated through numerical and hybrid simulation tests.
ENGINEERING STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
Qi Wu, Wei jia Ma, Qifei Liu, Kai Zhao, Guoxing Chen
Summary: The addition of rubber particles into clean sand significantly improves the dynamic performance of the host sandy soil, showing great potential in seismic isolation and reduction applications. A unified model was proposed to describe the dynamic properties of rubber-sand mixtures.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Engineering, Mechanical
Masami Matsubara, Ryo Takara, Taichi Komatsu, Shogo Furuta, Khoo Pei Loon, Masakazu Kobayashi, Hitomu Mushiaki, Kentaro Uesugi, Shozo Kawamura, Daiki Tajiri
Summary: Observing the internal state during deformation is important for understanding the mechanical properties of polymeric materials like rubber. In this study, an experimental system was developed to simultaneously measure the dynamic mechanical properties and dynamic X-ray computed tomography (CT) of rubber materials. The results showed that the excitation frequency had minimal effect on the deformation amplitude in SBR material, while the excitation amplitude influenced the median value of local strain amplitudes. Comparing different base materials with distinct loss factors, no significant differences were observed in the histograms of local strain amplitudes, although the histograms varied based on formulation conditions.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Nathaphon Buddhacosa, Akbar Khatibi, Raj Das, Filippo Giustozzi, Joel Galos, Everson Kandare
Summary: This study produced syntactic foams containing untreated waste tyre-derived rubber particles, hollow glass microspheres, and epoxy via compressed air-assisted injection moulding. The effect of rubber particles on the compression properties and vibration-damping response of the foam was investigated. The interaction between foam constituents was analyzed using scanning electron microscopy, and the impact of rubber particles on the energy absorption of the foam was studied.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Engineering, Geological
E. Zhou, L. Cui, X. Zuo, L. Wang
Summary: This study aims to assess the effectiveness of using waste tires in buried pipe protection. The laboratory model tests show that the inclusion of rubber particles in soil can change the distribution of earth pressure and significantly reduce the increment of earth pressure. Mixtures with 20%-30% rubber particles exhibit better performances in regards to responses of pipe-soil system.
GEOSYNTHETICS INTERNATIONAL
(2023)
Article
Green & Sustainable Science & Technology
Fangyuan Gong, Weijie Lin, Zhenkan Chen, Tao Shen, Chichun Hu
Summary: This study investigates the high-temperature rheological properties of crumb rubber composite modified asphalt by preparing CRCM asphalt with different types of crumb rubber and composite additives. The results show that the incorporation of crumb rubber and additives increases asphalt viscosity and improves high-temperature performance. The addition of crumb rubber and additives can enhance elastic components, improve permanent deformation resistance, and reduce stress sensitivity of asphalt.
Article
Acoustics
E. Tubaldi, A. Dall'Asta, L. Dezi
SHOCK AND VIBRATION
(2015)
Article
Engineering, Civil
Enrico Tubaldi, Laura Ragni, Andrea Dall'Asta
EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS
(2015)
Article
Construction & Building Technology
Quan Gu, Alessandro Zona, Yi Peng, Andrea Dall'Asta
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2014)
Article
Engineering, Civil
L. Ragni, D. Cardone, N. Conte, A. Dall'Asta, A. Di Cesare, A. Flora, G. Leccese, F. Micozzi, C. Ponzo
JOURNAL OF EARTHQUAKE ENGINEERING
(2018)
Article
Engineering, Civil
Fabrizio Scozzese, Giusy Terracciano, Alessandro Zona, Gaetano Della Corte, Andrea Dall'Asta, Raffaele Landolfo
JOURNAL OF EARTHQUAKE ENGINEERING
(2018)
Article
Architecture
Claudia Canuti, Sandro Carbonari, Andrea Dall'Asta, Luigino Dezi, Fabrizio Gara, Graziano Leoni, Michele Morici, Enrica Petrucci, Andrea Prota, Alessandro Zona
Summary: This paper analyzes the damage observed from post-earthquake investigations on churches in the Marche Region struck by the 2016 Central Italy seismic sequence. Data collected by teams of structural engineers was processed to evaluate damage and vulnerability of religious buildings in the region. The overall damage of the sample was compared to empirical models and previous studies.
INTERNATIONAL JOURNAL OF ARCHITECTURAL HERITAGE
(2021)
Article
Engineering, Geological
Michele Morici, Claudia Canuti, Andrea Dall'Asta, Graziano Leoni
BULLETIN OF EARTHQUAKE ENGINEERING
(2020)
Article
Engineering, Civil
Laura Ragni, Fabio Micozzi, Enrico Tubaldi, Andrea Dall'Asta
Summary: This paper examines the nonlinear behavior of high-damping natural rubber (HDNR) bearings and their relationship with the seismic performance of isolated structures. An advanced model is used to analyze the response of isolated structures at different seismic intensity levels, taking into account different configurations and practical factors.
JOURNAL OF EARTHQUAKE ENGINEERING
(2022)
Article
Engineering, Civil
Fabio Freddi, Enrico Tubaldi, Alessandro Zona, Andrea Dall'Asta
Summary: Buckling-restrained braces (BRBs) are effective in improving the seismic performance of structures, but may lead to residual deformations and excessive ductility demand. Coupling BRBs with moment-resisting frames (MRFs) to form dual systems can control residual drifts and optimize performance if properly designed. This study provides insights into the performance and residual capacity of BRBFs-MRFs dual systems and the influence of BRB design parameters.
EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS
(2021)
Article
Engineering, Geological
Andrea Dall'Asta, Hamed Dabiri, Emanuele Tondi, Michele Morci
Summary: This paper explores the impact of Time-Dependent Seismic Hazard on structural design by evaluating the required strength for different time intervals since the last event. Results show a significant influence of time-dependent hazard properties on the structural capacity required to achieve a target reliability level, indicating the different roles played by various parameters in the analysis.
BULLETIN OF EARTHQUAKE ENGINEERING
(2021)
Correction
Engineering, Geological
Andrea Dall'Asta, Hamed Dabiri, Emanuele Tondi, Michele Morici
BULLETIN OF EARTHQUAKE ENGINEERING
(2021)
Article
Engineering, Civil
F. Micozzi, A. Flora, L. R. S. Viggiani, D. Cardone, L. Ragni, A. Dall'Asta
Summary: This paper investigates the seismic response and risk of base-isolated structures with different configurations of rubber-based isolation systems, utilizing multi-stripe nonlinear time history analysis. The results show that the isolation systems effectively limit damage but have a low margin against collapse, regardless of the dominant failure mode. The annual failure rates of base-isolated buildings were critically reviewed and compared with those of similar fixed-base buildings.
JOURNAL OF EARTHQUAKE ENGINEERING
(2022)
Article
Chemistry, Analytical
Antonio Costanzo, Sergio Falcone, Antonino D'Alessandro, Giovanni Vitale, Sonia Giovinazzi, Michele Morici, Andrea Dall'Asta, Maria Fabrizia Buongiorno
Summary: This technological system can assist decision-makers in planning post-earthquake response activities by generating damage scenarios based on real-time ground motion data and structural characteristics of buildings, particularly in densely populated and historic urban areas. The system has been tested in the historic area of Camerino, Italy, and uses fragility curves to relate ground motion acceleration peaks to the probability of damage levels.
Proceedings Paper
Construction & Building Technology
Laura Gioiella, Fabrizio Scozzese, Enrico Tubaldi, Laura Ragni, Andrea Dall'Asta
Summary: Damper failures are brittle mechanisms that can weaken the structure's ability to withstand seismic activity and decrease overall system robustness. Failure can occur due to reaching maximum force capacity, end-stroke impacts, or excessive piston velocity. Safety factors are necessary to design anti-seismic devices with proper margins against failure and to achieve target safety levels. This study investigates the effects of damper failure and different reliability factors on fragility and seismic risk using advanced modeling and analyzing various demand parameters of a steel moment-resisting frame building.
SEISMIC ISOLATION, ENERGY DISSIPATION AND ACTIVE VIBRATION CONTROL OF STRUCTURES, 17WCSI 2022
(2023)
Article
Construction & Building Technology
Lucia Minnucci, Fabrizio Scozzese, Sandro Carbonari, Fabrizio Gara, Andrea Dall'Asta
Summary: This paper proposes a probabilistic methodology to evaluate the fragility of bridges, aiming to reveal the potential failure mechanisms and the evolution and extent of structural damage. By applying this methodology to a reinforced concrete bridge case study, the applicability of the approach is demonstrated.
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)
