Bin Wang

• Ph.D. of Structural Engineering
• Professor at Sichuan University

Seismic base isolation systems have been widely used in structures located in highly earthquake-prone regions to mitigate the earthquake responses of superstructures. An effective isolation function is achieved at the expense of deformations that are mostly concentrated at the isolation layer due to the lower lateral stiffness of the isolation syst...

In recent years, research on negative stiffness devices (NSDs) for vibration 6 control has increased. This study examines the combination of NSDs with tuned mass 7 dampers (TMDs) and explores the NSD-TMD as a nonlinear energy sink (NES). The 8 particle swarm optimization (PSO) algorithm was employed to determine the optimal 9 parameters for the TMD...

In recent decades, transit-oriented development has emerged as a prominent trend in metropolises. Modern infrastructures and residential buildings are strategically constructed above subway lines or parking depots, facilitating convenient access to city transportation. Nonetheless, complaints regarding the vibrations induced by metro vehicles have...

This paper investigates a steel moment resisting frame (MRF) with a novel type of self‐centering (SC) base isolators, wherein superelastic shape memory alloy (SMA) U‐shaped dampers (SMAUDs) work as core components. A two‐story steel MRF model equipped with two SMAUD‐based isolators was designed and built in the laboratory, and a series of shake tab...

A negative stiffness device (NSD) utilizing pre-compressed helical springs has been integrated with diverse vibration control techniques. Recently, the incorporation of NSD has been proposed to enhance the efficacy of a tuned mass damper (TMD) controlled system. This study introduces two design strategies for the NSD–TMD system, which functions eit...

This paper presents an innovative two-level shape memory alloy (SMA)-based self-centring (SC) steel column, referred to as TSSSC. The TSSSC is interconnected by two series of SMA bolts, differing in diameters and lengths, to achieve multi-yielding. This is intended to fulfil multiple performance-based design objectives and augment the structural du...

Steel U-shaped dampers (UDs) are one of the earliest types of metallic energy dissipation devices. Previous studies have been conducted in past years to investigate the hysteretic behavior of steel UDs under in-plane and out-of-plane loadings. However, little attention has been paid to the working mechanism of the steel UDs under vertical loadings....

The application of periodic pile barriers for isolating ambient vibrations has emerged as a significant research topic, which is essentially the problem of wave scattering by periodically distributed structures. This study presents an analytical series solution for anti-plane shear (SH) wave scattering by infinitely periodic pile barriers using the...

Steel-plate-reinforced concrete composite walls are now widely used in tall buildings in China, particularly in earthquake zones. This paper presents the features and mechanisms of steel-plate-reinforced concrete walls together with a summary of experimental and finite-element investigations. The results indicate that seismic performance is conside...

Bouc–Wen (BW) model is commonly used to model lead rubber bearings (LRBs) in seismically isolated buildings. However, the original BW model violates the Drucker’s or Ilyushin’s postulate of plasticity by displaying the displacement drift, force relaxation, and non-closure of hysteretic loops. These deficiencies can significantly impact the seismic...

The advantages of nonlinear energy sink (NES) have been proven to effectively 9 reduce vibrations in the horizontal direction. The application of NES devices to suppress 10 vertical vibration is still at an early stage. In this study, a new type of NES that works in 11 the vertical direction, where disc springs and viscous dampers are utilized to c...

This study presents a novel self‐centering (SC) base isolation system enabled by traditional lead rubber bearing (LRB) incorporating superelastic shape memory alloy (SMA) U‐shaped dampers (hereinafter referred to as SMA‐LRB). This system is particularly suitable for some important structures (e.g., hospital buildings) that require high seismic perf...

The high damping rubber bearing (HDRB) is an advanced seismic isolation component currently used in building structures with excellent energy dissipation capacity. To explore a deeper understanding of the HDRBs’ performance and effectiveness, a series of six-degree-of-freedom (6DOF) quasi-static tests were designed and conducted on three HDRB speci...

Lead rubber bearings (LRBs) have been widely used in seismic isolation systems to mitigate earthquake damage in regions characterized by high seismic intensity. However, effective isolation is achieved at the expense of largely concentrated displacement in the isolation layer. Past experimental studies have confirmed that rubber stiffening and degr...

High damping rubber bearings (HDRBs) are commonly used in base isolation systems, which can protect the structures from heavy earthquake damage by elongating natural vibration periods of the structures and improving the energy dissipation capacity of the systems. For the HDRBs, the stiffness hardening effect is exhibited at large shear strain, whic...

In the past few decades, the modern design philosophy of structural engineering has gradually shifted from preventing building collapse and loss of lives to high-performance objectives. However, traditional construction materials (e.g., concrete, wood, and steel) may not meet some of the high-performance structural design objectives under extreme d...

This study presents an innovative base isolation system with negative stiffness devices (NSDs) for seismic protection of structures. It is implemented by the vertical pre-stressed helical springs to generate variable stiffness in the lateral direction. The design concept of the NSDs is first introduced, and the induced lateral restoring force was g...

A two-level performance-based seismic design (PBSD) approach for frame structures isolated by self-centring isolators (SCIs) is proposed in this study. Unlike the traditional PBSD process that generally designs a structure for a specific seismic intensity level first and then checks structural performance for other levels, the proposed PBSD approac...

In this study, a novel D-type self-centering (SC) eccentrically braced frame (EBF) based on superelastic shape memory alloy (SMA) is proposed. Unlike traditional SC-EBFs using a posttensioned mechanism, the proposed EBF utilizes only SMA angles and steel angles, which can vastly simplify the construction of the whole structure. The behavior of the...

Meteorological normalization refers to the removal of meteorological effects on air pollutant concentrations for evaluating emission changes. There currently exist various meteorological normalization methods, yielding inconsistent results. This study aims to identify the state-of-the-art method of meteorological normalization for characterizing th...

Emission inspection of motor vehicles (emission inspection) is a crucial player in solving the problem of motor vehicle exhaust pollution, and research on the features affecting emission inspection results and their importance is a basis for optimizing the environmental management of motor vehicles. However, there is no study on the multi-feature i...

In the present study, we aim to evaluate the delayed and cumulative effect of ozone (O3) exposure on mumps in a megacity with high population density and high humidity. We took Chongqing, a megacity in Southwest China, as the research area and 2013–2017 as the research period. A total of 49,258 confirmed mumps cases were collected from 122 hospital...

As a new member of the shape memory alloy (SMA) material family, iron-based SMAs (Fe-SMAs) show great potential in seismic applications due to their favorable properties. The thermomechanical behavior of Fe-SMAs has been extensively studied over the past decades. However, the relevant research regarding the use of Fe-SMAs in the community of earthq...

Reinforced concrete (RC) coupled walls are extensively used as the seismic-resistant structural system of tall buildings in high seismic zones. In RC coupled wall systems, the coupling beams are typically designed and detailed to dissipate energy through large inelastic responses to meet the expected seismic performance under moderate-to-strong ear...

Superelastic shape memory alloys (SMAs) have attracted considerable interest in the field of earthquake engineering recently due to their excellent self-centering and moderate energy dissipating capabilities. This unique feature provides promising solutions that can be used in the passive control of structures under strong earthquakes. However, the...

This study systematically investigates the cyclic behavior and deformation mechanism of superelastic shape memory alloy U-shaped dampers (SMA-UDs) that are intended for seismic resilient applications. The study first summarized the experimental investigations of a series of SMA-UD component tests under loadings in two directions (i.e. in-plane and...

Nonlinear energy sinks (NESs) have outperformed tuned mass dampers in mitigating undesired responses against changes in structural frequencies. However, the dilemma of gaining frequency robustness at the cost of energy sensitivity as well as the large masses of devices required for civil engineering structures impede the applications of existing NE...

Daily fine particulate matter (PM2.5) and precipitation samples were collected simultaneously at an urban site in southwest China in four segregated months in 2015 for measuring major water-soluble inorganic ions (WSIIs). Online hourly concentrations of PM10 and PM2.5 were also monitored, which showed annual mean concentrations of 67.8 and 41.6 µg...

p>This paper presents an inerter-enhanced nonlinear mass damper developed from an asymmetric nonlinear energy sink (Asym NES), which adds an inerter between the auxiliary mass of the Asym NES and a fixed point. The size of the Asym NES-inerter (Asym NESI) can be significantly reduced due to the inerter providing a large inertial effect with limited...

The effects of recent earthquakes on societies around the world have highlighted the importance of continuing to develop innovation in the space of structural/earthquake engineering. To facilitate the exchange of ideas and promote international collaborations, we would like to invite you to join our discussion about recent advances in structural/ea...

In September 2018, China’s air quality monitoring protocol was amended from the standard conditions to actual conditions for particulate matter and to reference conditions for gaseous pollutants. Due to the amendment, the reported concentrations of the gaseous pollutants decreased by a constant rate of 8.4%, and the averages of PM2.5 (particulate m...

This paper presents a comprehensive study on seismic response mitigation of building structures enabled by a novel vibro-impact dual-mass damper (VIDM). VIDMs consist of a linear oscillator and a nonlinear oscillator with impact surfaces between these two oscillators. The working principle of VIDMs is first presented via the equations of motion and...

Track nonlinear energy sinks (track NESs) have been shown to be an effective and applicable strategy to mitigate structural response in recent years. However, previous studies on track NESs has mainly focused on demonstrating the benefits of track NESs through numerical simulations and experiments, with relatively little attention paid to the analy...

Shape memory alloys (SMAs) are high-performance metallic materials that have attracted a significant research attention recently in the field of civil engineering. SMAs can exist in two different phases of austenite and martensite. The reversible phase transformation from austenite to martensite and vice versa forms the basis for the unique behavio...

This paper proposes novel self-centering (SC) seismic base isolators by utilizing shape memory alloy U-shaped dampers (SMA-UDs) with favorable superelastic behavior. Two different designs, which incorporate the SMA-UDs into a conventional laminated rubber bearing with a lead core or that with steel-UDs, are investigated. In both designs, four group...

This paper proposes a novel passive mass damper, namely, asymmetric nonlinear energy sink (Asym NES), which is characterized by integrating linear and nonlinear restoring forces to mitigate the unwanted responses of building structures. The Asym NES, configured based on a cubic NES, consists of an auxiliary mass connected to the primary structure t...

This paper presents a track nonlinear energy sink (track NES) and a single‐sided vibro‐impact track nonlinear energy sink (SSVI track NES) as effective control strategies to mitigate the seismic response of high‐rise buildings. The study commences with the analytical models of the track NES and the SSVI track NES and the state‐space description of...

Shape memory alloys (SMAs) are high-performance metallic materials that can experience large strain and still recover their initial shape through either temperature-induced effect (shape memory) or stress-induced effect (superelasticity). The superelasticity of SMAs is very attractive to the earthquake resilient design because of the inherent mater...

This study presents a novel precast reinforced concrete (RC) wall system using shape memory alloy (SMA) bars and replaceable energy dissipating (ED) devices to achieve earthquake resilience (hereafter referred to as SMA-based RC wall). The major advantages of this structural system include (1) self-centering (SC) capability provided by the unbonded...

Steel moment-resisting frames are popular structural systems used extensively around the world. However, conventional column base connections are vulnerable to large residual deformation after strong earthquakes. By contrast, shape memory alloys (SMAs), which are high-performance metallic materials, can experience large strains and still recover th...

This study evaluates the seismic behavior of the square concrete-filled steel tube (CFT) column under cyclic loading. A total of nine large-scale square CFT columns with different shear stud layout and axial compressive load ratio designed according to the recommendations of the engineering practice were investigated. Seismic performance of these s...

Shape memory alloys (SMAs) show great potential in seismic applications because of their appealing superelastic feature and good energy dissipation capacity. The tensile behavior of SMA wires and bars has been extensively studied over the past decades. However, little attention has been paid to their compressive properties under cyclic loading. Thu...

As high-performance metallic materials, shape memory alloys (SMAs) have been investigated increasingly by the earthquake engineering community in recent years, because of their remarkable self-centering (SC) and energy-dissipating capabilities. This paper systematically presents an experimental study on a novel superelastic SMA U-shaped damper (SMA...

Reinforced concrete (RC) wall is a common type of structural component used in high-rise buildings to resist lateral loads induced by earthquakes. RC walls are typically designed and detailed to dissipate energy through significant inelastic responses to meet expected seismic performance under moderate-to-strong earthquakes. However, costly repair...

This paper aims to investigate the seismic behavior of steel truss reinforced concrete (STRC) core walls under cyclic lateral loading. The quasi-static tests on two 1/5-scaled specimens including one steel reinforced concrete (SRC) core wall and one STRC core wall with embedded steel trusses designed according to engineering practice were conducted...

Reinforced concrete (RC) shear wall is one of the predominant structural components used extensively in high-rise buildings to resist lateral loads induced by earthquakes around the world. However, the past earthquake experience and previous research indicated that RC shear walls at the bottom of high-rise buildings may display the undesirable perf...

Many existing RC structures around the world were designed to sustain gravity and wind loads only. Past earthquake reconnaissance have shown that strong earthquakes can lead to substantial damage ranges to non-seismically designed RC buildings, particularly to beam-column joints. This paper presents a novel retrofit method using buckling restrained...

In recent years, steel plate reinforced concrete (SPRC) tubes have been applied in super-tall buildings increasingly in China Mainland. However, there has been very limited information about the damage behavior of such kind of composite tube subjected to the earthquake. This paper presents the quasi-static tests on three 1/5-scaled specimens includ...

In recent decades, structural engineering tends to progress toward more novel high-rise structures under the requirement of realistic functions and architectural aesthetics. The complex high-rise building structure in this study has two towers with lapping transfer columns. The lapping transfer columns, considering aesthetic requirement in elevatio...

Previous experimental research on shear walls has mainly focused on load carrying capacity, deformation, or hysteretic characteristics, with relatively little attention paid to individual damage states and their corresponding responses during the entire loading process until failure. The damage behavior of seven reinforced concrete shear wall speci...

China Pavilion for Expo 2010 Shanghai is designed with peculiar style and special structural system. The main structure is composed of four concrete tubes with steel-concrete composite floors. It is designed with a shape of inverted trapezoid in elevation. The fundamental vibration mode of this structure is a torsional mode due to the special shape...