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| 1 | 结构震后残余位移研究进展显示文摘结构在强震作用下进入非线性阶段会产生不可恢复的永久位移或残余变形,结构残余位移是震后结构抗震性能和地震损失评估的重要参数,具有重要的理论意义和工程实用价值。为了深入分析残余位移的研究现状,为面向性态抗震设计和抗震韧性评估的地震动强度指标研究提供参考,全面和系统分析了国内外结构残余位移相关文献,介绍了残余位移的定义,重点论述了影响结构残余位移的主要因素,总结归纳了残余位移计算模型、残余位移控制方法及考虑残余位移的抗震性能评估方法,最后讨论了残余位移研究中存在的问题和建议。 | 刘巴黎 胡进军 | 2020 | 世界地震工程2020，36，3： | 3 |
| 2 | 双向地震激励下基于二维屈服面模型的残余位移谱研究显示文摘为了研究地震动的多维性和结构响应的空间耦合性对结构残余位移需求的影响,建立了恢复力特性符合二维屈服面模型的单质点双自由度体系(SMDDOF),提出双向地震激励下的等强度残余位移谱模型,对比分析了单向和双向地震激励下单自由度(SDOF)体系的残余位移谱。以不同场地类别的140组地震动记录为双向激励,建立统计平均的等强度残余位移谱,分析场地条件和两主轴方向刚度比对双向地震激励下单自由度体系残余位移谱的影响。结果表明:通过单自由度体系单向地震动输入建立的残余位移谱可能会低估结构残余位移需求;中长周期范围内,双向地震激励下的残余位移比谱值随刚度比的增大而增大;恢复力耦合效应对结构残余位移响应的影响取决于两主轴方向损伤的相互制约,其中一个主轴方向刚度的削弱会增大该主轴方向的残余位移需求,而另一主轴方向的残余位移需求则会有所减小。 | 刘巴黎 胡进军 谢礼立 | 2021 | 振动与冲击2021，40，14： | 2 |
| 3 | Residual drift spectra for RC bridge columns subjected to near-fault earthquakes显示文摘Permanent displacement of a bridge column can be directly measured during the inspection after near-fault earthquakes.However,the engineer needs to estimate the expected residual drift at the design stage to determine if the bridge seismic performance is satisfactory.The most direct method to estimate the residual displacement is nonlinear response history analysis,which is time consuming and cumbersome.Alternatively,an attractive but indirect method is generating estimated residual displacement spectra that depend on displacement ductility demand,column period,site conditions,and earthquake characteristics.Given the period and the expected displacement ductility demand for the column,the residual drift response spectra curves can be utilized to estimate the residual drift demand.Residual drift spectra that are applicable to RC bridge columns in different parts of the United States were developed based on nonlinear response history analyses using a comprehensive collection of recorded and synthetic near-fault ground motions and were linked to one-second spectral acceleration(S1)of the AASHTO maps.It was also found that the residual drift ratio is below one percent when S1 is less than 0.6 g. | S.M.Seyed Ardakani M.Saiid Saiidi Paul Somerville | 2021 | Earthquake Engineering and Engineering Vibration2021，20，1： | 1 |
| 4 | 基于不同归一化参数的单自由度体系残余位移比离散性研究显示文摘结构弹塑性特征的差异会引起残余位移较大的离散性,使得强震下结构残余位移难以准确预测.为准确评估和预测震后结构残余位移,实现精细化的抗震设计和评估,有必要研究结构残余位移的离散性.鉴于此,基于大量分类地震动记录,选用不同的归一化参数分别定义残余位移比,通过非线性时程分析建立单自由度体系残余位移比谱,研究弹塑性特征参数(延性系数和强度折减系数)以及场地条件对残余位移比离散性的影响,建立了残余位移比变异系数谱的拟合公式.结果表明:残余位移与弹塑性谱位移的相关性比与弹性谱位移更好;结构残余位移比离散性受场地类别的影响较小;残余位移比变异系数谱分别随延性系数和强度折减系数的增大而增大;选择弹塑性谱位移作为归一化参数可以减小结构残余位移比离散性. | 胡进军 刘巴黎 | 2021 | 湖南大学学报(自然科学版)2021，48，7： | 0 |
| 5 | Direct scaling of residual displacements for bilinear and pinching oscillators显示文摘The estimation of residual displacements in a structure due to an anticipated earthquake event has increasingly become an important component of performance-based earthquake engineering because controlling these displacements plays an important role in ensuring cost-feasible or cost-effective repairs in a damaged structure after the event.An attempt is made in this study to obtain statistical estimates of constant-ductility residual displacement spectra for bilinear and pinching oscillators with 5%initial damping,directly in terms of easily available seismological,site,and model parameters.None of the available models for the bilinear and pinching oscillators are useful when design spectra for a seismic hazard at a site are not available.The statistical estimates of a residual displacement spectrum are proposed in terms of earthquake magnitude,epicentral distance,site geology parameter,and three model parameters for a given set of ductility demand and a hysteretic energy capacity coefficient in the case of bilinear and pinching models,as well as for a given set of pinching parameters for displacement and strength at the breakpoint in the case of pinching model alone.The proposed scaling model is applicable to horizontal ground motions in the western U.S.for earthquake magnitudes less than 7 or epicentral distances greater than 20 km. | Mohammad Saifullah Vinay K.Gupta | 2024 | Earthquake Engineering and Engineering Vibration2024，23，1： | 0 |
| 6 | 考虑残余变形的RC框架结构抗震性能评估显示文摘震后残余变形对于工程结构震后损伤和可修复性能的评价至关重要。首先,选取790条地震动记录对一个5层钢筋混凝土(RC)框架结构进行增量动力分析,线性回归得出结构各损伤状态(性能水平)与残余层间位移角的量化关系;然后,分别对一个8层和一个11层RC框架结构进行增量动力分析,研究结构最大层间位移角和残余层间位移角两种损伤指标间的相关性;最后,对8层和11层结构分别进行基于两种损伤指标的地震易损性分析。分析结果表明:残余层间位移角与最大层间位移角具有较好的相关性;以最大层间位移角为结构损伤指标所得残余层间位移角无明显差异性,同样以残余层间位移角为结构损伤指标所得最大层间位移角也无明显差异性;以最大层间位移角和残余层间位移角为损伤控制指标,各损伤状态下50%超越概率对应的谱加速度Sa(T1,5%)无明显偏差;以规范给出的最大层间位移角为损伤控制指标相对文章提出的残余层间位移角较为保守。因此,将残余层间位移角作为性能指标的研究对于基于层间位移角的震后结构性能评估是必要的。 | 魏世龙 韩建平 黄林杰 | 2023 | 土木工程学报2023，56，1： | 0 |
| 7 | Response prediction using the PC-NARX model for SDOF systems with degradation and parametric uncertainties显示文摘Building collapses during recent earthquakes have brought up the need for research on factors pertaining to collapse and the safety of structures.This requires response replication of structures that account for uncertainties from ground motions and structural properties.Structural collapse often implies that the structural system is no longer capable of maintaining its gravity load-carrying capacity,which often points to factors involving strength and stiffness degradation.In this study,the polynomial chaos nonlinear autoregressive with exogenous input form(PC-NARX)model is explored for dynamic response replication of a nonlinear single-degree-of-freedom(SDOF)structure.The generalized hysteretic Bouc-Wen model is applied to emulate stiffness and strength degradation for an SDOF structure close to collapse.A stochastic ground motion model is used to represent the uncertainties in seismic excitation.The PC-NARX model is employed and further evaluated for response replication of an SDOF system with inherent uncertain structural properties.A generic algorithm(GA)is used to select the terms for structural dynamics,and polynomial chaos expansion(PCE)is used to incorporate uncertain parameters into NARX model coefficients.It is demonstrated that the PC-NARX model provides good accuracy to account for both ground motion and structural uncertainties into response replication of SDOF structures with significant strength and stiffness degradation.The PC-NARX model thus presents a promising technique for collapse safety analysis of structures. | Gao Xiaoshu Chen Cheng Hou Hetao Jiao Shenghu | 2022 | Earthquake Engineering and Engineering Vibration2022，21，2： | 0 |
| 8 | 基于强度和延性的残余位移比谱及其影响因素分析显示文摘结构震后残余位移是抗震性能评估和地震损失评估的重要参数。文中针对理想弹塑性单自由度体系,采用与残余位移相关性最好的归一化参数定义残余位移比,通过动力时程分析建立统计平均的等延性残余位移比谱和等强度残余位移比谱,研究场地条件、延性系数及强度折减系数对等延性残余位移比谱和等强度残余位移比谱的影响,通过回归分析构建了等延性残余位移比谱和等强度残余位移比谱的预测方程。结果表明:残余位移与弹塑性谱位移的相关性较大,与弹性谱位移的相关性较小;软土场地下结构残余位移的评估需考虑场地条件的影响;残余位移比离散性受延性系数和强度折减系数影响显著。 | 刘巴黎 胡进军 谢礼立 | 2021 | 地震工程与工程振动2021，41，4： | 0 |
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