Lili Xie's research while affiliated with JiangHan University and other places

Publications (89)

Article
As a widely used dynamic computation method for seismic response analysis of structures, time history analysis (THA) can be a time-consuming procedure in some situations. In order to reduce the calculation time, this study proposed a novel strong ground motion duration which can truncate the head and tail weak signals of records before THA. The ini...
Article
Selecting spectrum-matched ground motions is one of the critical problems in the seismic analysis and design of structures. The sum of the square errors (SSE) has been commonly used to quantitatively measure the similarity between the response spectrum of a ground motion and a target spectrum. However, it cannot represent the two-dimensional plane...
Article
Earthquakes impose substantial threats to the built environment of urban communities. To reduce the catastrophic consequences of earthquakes, there is an urgent need to build seismic resilient cites that can better resist seismic damage and enable a rapid post-disaster recovery. This paper gives the definition of urban seismic resilience, and estab...
Article
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To accurately predict and quantify the potential structural damage (PSD) of ground motion records (GMRs), an intensity measure (IM) that correlates well with the structural response is needed. This paper proposes an exploratory factor analysis (EFA)-based approach for developing a compound intensity measure (CIM) for characterizing the PSD of GMRs....
Article
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Passive film is a natural barrier against corrosion, which forms spontaneously in alkaline solution. But as a key problem for corrosion resistance, the growth and failure process of passive film has not been clearly confirmed. In this paper, the fine structure of passive film is explored on the atomic scale, and the growth mode of crystals is demon...
Article
This paper proposes convenient probabilistic models to estimate the seismic demands of circular tunnels to transversal seismic load. The uncertainties in the earthquake intensity, seismic load, and calculation methods are fully considered. Peak ground velocity PGV is selected as an essential earthquake intensity parameter because it is more correla...
Article
In this article, four pseudo-static tests of infilled RC frames were performed, including an unmodified solid infilled RC frame, an unmodified infilled RC frame with opening and two innovative structural designed specimens for the two original ones respectively. The solid bricks were made of rice husk and Magnesium oxysulfate cement, which is a rec...
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To rank the pulse-like ground motions based on the damage potential to different structures, the internal relationship between the damage potential of pulse-like ground motions and engineering demand parameters (EDPs) is analyzed in this paper. First, a total of 240 pulse-like ground motions from the NGA-West2 database and 16 intensity measures (IM...
Article
This paper presents a numerical approach to construct the seismic probabilistic capacity models for the transversal lining section of circular tunnels. The influence of the lining dimension, reinforcement ratio, and properties of the concrete, reinforcement steel, and soil are considered. Two capacity measures, the bending moment M and the diametri...
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Hospitals play essential roles in modern communities in the lives of people. During and after earthquakes, they are supposed to be resilient and provide continued medical and social services. Resilience assessment methods are essential for determining hospitals' resilience levels, and the results will provide a direct basis and foundation for the d...
Article
To quantitatively evaluate the destructive capacity of ground motions for Chinese seismic design, a method to rank the ground motion based on a new comprehensive intensity measure is proposed. A total of 5535 ground motions from NGA-West2 database were used as the input ground motions for dynamic time history analysis to four typical reinforced con...
Article
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This paper investigates the constant-damage residual displacement ratios Cr (i.e., the ratio of the residual displacement in terms of the maximum inelastic displacement) of single-degree-of-freedom (SDOF) systems with different damage levels. A statistical study aimed at estimating the constant-damage Cr is conducted using the modified Park–Ang dam...
Article
The relative input energy of a ground motion is used to quantitatively estimate the destructive capacity of ground motion to a structure, which reflects the deformation capacity and energy dissipation capacity of a structure. The destructive capacity of a ground motion on a structure is known to be relevant to the structural period. Because ranking...
Article
A fast repair method is developed for earthquake induced-flexure/shear damage at the bottom of the reinforced concrete (RC) columns. The method is a kind of hybrid jacket that employs a thin stainless steel jacket wrapped around the column and the outside stainless prestressed steel hoops. The prestressed steel hoops provide active confinement for...
Article
This paper presents the results of an experimental study of the uniaxial compression behavior of circular section concrete columns confined by composite confinement (CC). The composite confinement includes prestressed steel hoops (PSH) active confinement and steel jackets (SJ) passive confinement. PSH can solve the problem of passive confinement st...
Article
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The constant-strength ductility spectrum is a nonlinear response spectrum that is commonly used to establish the demand curve of the seismic response during performance-based seismic design. It is affected by many factors. In this paper, to evaluate the effect of the major influencing factors, including the structural parameters and seismic factors...
Article
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Pulse-like ground motions are capable of inflicting significant damage to structures. Efficient classification of pulse-like ground motion is of great importance when performing the seismic assessment in near-fault regions. In this study, a new method for identifying the velocity pulses is proposed, based on different trends of two parameters: the...
Data
This is the MATLAB code of the paper Guochen Zhao, Longjun Xu, Lili Xie. A Simple and Quantitative Algorithm for Identifying Pulse-Like Ground Motions Based on Zero Velocity Point Method. Bulletin of the Seismological Society of America, 2016, 106(3): 1011-1023
Article
Strong column-weak beam is one of the important concepts in seismic design of RC frame structure. The experience of earthquake damage shows that the structure designed according to the existing codes cannot achieve the expected failure mode of strong column-weak beam due to the effects of factors such as axial compression ratio, slab and so on. In...
Article
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The phenomenon of hospital functional interruption has been widely observed in the historical moderate-strong earthquakes, indicating that hospital functionality cannot be well considered in the current seismic design methods. The concept of seismic resilience pays enough attention to postearthquake functionality of buildings, and it is particularl...
Article
In steel–concrete composite structures, studs are critical in the shear transfer between steel and concrete. A series of push-out tests were performed to investigate the shear behavior of studs in high-strength concrete subjected to monotonic and cyclic loadings. All studs were attached to steel flanges by groove fillet welding. The primary paramet...
Article
This manuscript presents a new model, named SY model, to predict horizontal peak ground acceleration and 5% damped response spectrum for shallow crustal earthquakes in Sichuan-Yunnan region of China. SY model considers the influences of magnitude, rupture distance, fault types, site amplification and hanging-wall scaling on ground motions. The rand...
Conference Paper
Ground motions with strong velocity pulses are of special concern for structural engineers because they can impose extreme seismic demands on structures. Many quantitative methods have been presented in the past to identify such ground motions. However, there are still many pulse-like ground motions with multiple or irregular pulses that cannot be...
Article
Tie-bars play an important role in the transfer of the shear between the steel faceplate and the concrete in steel-plate concrete composite structure. Twelve push-out specimens were tested to investigate the shear behavior of tie-bars subjected to monotonic and cyclic loadings in high strength concrete. The primary parameters analyzed in this study...
Article
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How to incorporate near-fault directivity effect into the ground motion prediction equations (GMPEs) is an active research topic in recent years. Many studies demonstrated that the directivity could amplify the spectral accelerations (Sa) in a range close to the pulse period (Tp). This study intends to propose a new empirical narrowband model for i...
Article
Structures located in seismically active regions may be subjected to mainshock-aftershock (MSAS) sequences. Strong aftershocks significantly affect the hysteretic energy demand of structures. The hysteretic energy, EH,seq, is normalized by mass m and expressed in terms of the equivalent velocity, VD,seq, to quantitatively investigate aftershock eff...
Article
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Many earthquakes have indicated that the mainshock-damaged structures may be more vulnerable to severe damage and collapse during the subsequent aftershocks. This manuscript presents a framework for the vulnerability assessment of structure under the mainshock-aftershock sequences. In this framework, the engineering demand parameter (EDP) which can...
Article
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Evaluation of the seismic performance of masonry-infilled reinforced concrete (RC) frames is challenging because a number of damage patterns can be induced by the interaction between the infill and the frame. In this paper, the extended finite-element method (XFEM) is adopted to model the cracking behavior and the compressive failure of concrete in...
Article
The development of a powerful numerical model to simulate the fracture behavior of concrete material has long been one of the dominant research areas in earthquake engineering. A reliable model should be able to adequately represent the discontinuous characteristics of cracks and simulate various failure behaviors under complicated loading conditio...
Conference Paper
In events of manmade or natural hazards, local structural members may be destroyed or removed and loads created by the failure structural members may be redistributed within the structure. If the capacity of structural components is exceeded by additional loads, the progressive collapse of the structure may occur. Infill walls behave as equivalent...
Article
The main objective of this study is to assess the accuracy and applicability of static pushover analysis (POA). The POA is widely used to estimate the structural seismic response due to its simplicity. However, the accuracy of this method still needs to be evaluated due to the inherent limitations in its theory, especially for the evaluation of str...
Article
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This study proposes an improved energy-based approach for quantitative classification of velocity-pulse-like ground motions. The pulse amplitude is determined, in its value and in time location, by the amplitude of the half-cycle pulse having the largest seismic energy. After conducting statistical analyses, a newly-determined threshold level for s...
Article
This study explores the collapse process of a reinforced concrete (RC) frame structure subjected to earthquake shakings, by applying the shaking table test on a three-story, one-bay, 1/5-scaled RC structural model. The frame specimen transformed from an elastic state to a highly nonlinear state, then experienced dynamic instability, and finally col...
Article
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This study investigates the input energy spectra for inelastic single-degree-offreedom (SDOF) systems under main shock-aftershock sequences. The input energy spectra quantitatively reveal the effects of aftershocks on input energy, which verifies the necessity of incorporating aftershocks in energy-based seismic design. The investigation selects th...
Article
Pulse-like ground motions, which are mainly concentrated in near-fault regions, can induce severe damage on structures. This article presents a simple and effective method used for quantitatively identifying pulse-like ground motions. First, zero velocity point method is proposed based on the properties of trigonometric functions. This method can r...
Article
This study is focused on the constant ductility energy factors for bilinear system under the near-fault pulse-like ground motions. The variation of energy factors are studied in consideration of the earthquake magnitude, rupture distance, damping ratios and post-yield stiffness ratios. The results indicate that the near-fault pulse-like ground moti...
Article
This paper makes an attempt to investigate the low-frequency characterizations of pulse-type ground motions through ground motion components instead of original records. A decomposed method based on multi-resolution analysis is introduced in this article. The accuracy and validity of the method is tested in frequency domain, time domain and dynamic...
Article
Most reinforced concrete(RC)frame structures did not achieve the “strong column-weak beam” failure mode in recent big earthquakes, resulting in a large number of casualties and significant property loss. To deal with this serious problem, a new column-beam relative factor was proposed to characterize the relative yield situation of column ends and...
Article
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This paper collects a rich set of strong motion records in some typical earthquakes domestic and abroad, checks its seismic events, converts the data format, corrects the zeroline and draws the waveform. Four kinds of abnormal phenomena on the acceleration waveform are revealed, such as spike, asymmetric waveform, obvious baseline drift, and strong...
Conference Paper
This study investigates the seismic and progressive collapse potentials of frame structures with a soft story in their first stories. Two six-story RC infilled frames designed corresponding to two different seismic intensity levels are considered and their performances on seismic and progressive collapse capacity are analyzed. It is found that the...
Article
Near-field strong ground motions are useful for engineering seismology studies and seismic design, but dense observation networks of damaging earthquakes are still rare. In this study, based on the strong-motion data from the M w 6.6 Lushan earthquake, the ground motion parameters in different spatial regions are systematically analyzed, and the co...
Article
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In this study the seismic pounding response of adjacent multi-degree-of-freedom (MDOF) buildings with bilinear inter-story resistance characteristics is investigated through dimensional analysis. The application of dimensional analysis leads to a condensed presentation of the response, and the remarkable self-similarity property for bilinear MDOF b...
Article
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On April 14, 2010, a devastating Ms 7.1 earthquake occurred in Yushu, China. In the most severely struck area of Jiegu Town, approximately 94 % of the structures were damaged. A seismic intensity map was obtained based on field investigation data of structural damage in 63 residential areas, and the differences in structural damage in four intensit...
Article
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Knowledge of occupant evacuation process in a building presents engineers with an efficient way of testing the rationality of the building design before construction. Meanwhile, it benefits to the occupant casualty estimation in the building under earthquakes, which has been an essential problem in the performance-based earthquake engineering metho...
Article
Appropriate estimates of earthquake response spectrum are essential for design of new structures, or seismic safety evaluation of existing structures. This paper presents an alternative procedure to construct design spectrum from a combined normalized response spectrum (NRSC) which is obtained from pseudo-velocity spectrum with the ordinate scaled...
Article
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The focus of this paper is the seismic response of Large Crossing Transmission Tower-line System (LCTL) to near-fault ground motions, and whether simplified pulses are capable of representing the effects of the ground motion pulses present in near-fault ground motions on seismic response. The effects of forward-directivity pulses and fling-step pul...
Article
The effect of seawater on vertical ground motions is studied via a theoretical method and then actual offshore ground motion records are analyzed using a statistical method. A theoretical analysis of the effect of seawater on incident plane P and SV waves at ocean bottom indicate that on one hand, the affected frequency range of vertical ground mot...
Conference Paper
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This research aims to propose an effective method which simulates the evacuation process and evaluates the human casualty during the building collapse of a structure. The explicit nonlinear dynamic time-history method is used to analyze the collapse process of a three-story steel frame structure during earthquakes. Combining the cellular automata (...
Article
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This paper clarifies the reason why error occurs in the mass lumping procedure and presents a new approach to construct lumped mass matrices for Euler-Bernoulli beam elements, which contain both translational and rotational degrees of freedom. Lumped mass matrices provide the proper translational inertia but change the rotational inertia compared w...
Article
The effect of seismic super-shear rupture on the directivity of ground motions using simulated accelerations of a vertical strike-slip fault model is the topic of this study. The discrete wave number/finite element method was adopted to calculate the ground motion in the horizontal layered half space. An analysis of peak ground acceleration (PGA) i...
Article
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The goal of this article is to select those real (or recorded) ground motions capable of exposing the low- and mid-rise reinforced concrete frame structures to an extreme limit state. By performing correlation analyses, two optimal intensity measures are first selected to represent the ground motion damage potential. Then based on each record's dam...
Article
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Near-fault pulse-like ground motions have long been known to be capable of inducing significant seismic damages to the building structures. Reasonable classification of such ground motions has been a challenge to earthquake engineers. This study serves to propose an energy-based approach that can be used to identify those ground motions with domina...
Article
Long-period ground motion has become an important consideration because of the increasing number of large and long-period structures. Therefore, a thorough investigation on the formation and characteristics of long-period ground motion is desirable for engineering applications. In this work, an analytical study is performed to examine the effect of...
Article
A fiber-section model based Timoshenko beam element is proposed in this study that is founded on the nonlinear analysis of frame elements considering axial, flexural, and shear deformations. This model is achieved using a shear-bending interdependent formulation (SBIF). The shape function of the element is derived from the exact solution of the hom...
Article
This paper presents a methodology for constructing seismic design spectra in near-fault regions. By analyzing the characteristics of near-fault pulse-type ground motions, an equivalent pulse model is proposed, which can well represent the characteristics of the near-fault forward-directivity and fling-step pulse-type ground motions. The normalized...
Article
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Systematic differences in the duration and frequency content of ground motions from the hanging wall and footwall during the 2008 Wenchuan earthquake are investigated, focusing on the influence of these differences on structural input energy based on the elastic and inelastic energy responses of structures. A comparison of the input energy spectra...
Article
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A novel finite element method is presented to solve static and free vibration problems of axially and/or transversally functionally graded (FG) beams with variable cross-section profile. The presented method overcomes the inaccuracy of the conventional finite beam elements for analysis of the FG beams by introduction of exact displacement interpola...
Article
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An approach to analyzing structures by using beam elements is developed with adaptive displacement interpolation functions. First, the element stiffness matrix and equivalent nodal loads are derived on the basis of the equilibrium between nodal forces and section forces rather than the compatibility between nodal deformations and section deformatio...
Article
The hanging wall effect is an important factor that impacts the characteristics of strong ground motions in near-fault areas. Based on a residual analysis of ground motion parameters characterizing the hanging wall effect and in recognition of the nature of the effect, many models have been developed. In this study, after a comprehensive analysis o...
Article
We compare the response spectra between forward and backward direction, and the contour maps of response spectra at certain natural periods. Results indicate: (1) the response spectra in the forward direction is higher than that of the backward direction. For natural period smaller that 2 second, the average response spectra in forward direction is...
Article
We study the near field earthquake ground motion records and engineering damage caused by the great 2008 Mw7.9 Sichuan Wenchuan earthquake. Statistical analysis indicates: Although the earthquake has a thrust faulting mechanism, the dominating unilateral rupture propagation caused a distinct rupture directivity effect both on ground motion recordin...