Soil Dynamics and Earthquake Engineering最新文献_第5页

Elastoplastic constitutive model for saturated clay considering the cumulative deformation based on the laboratory test 基于实验室试验考虑累积变形的饱和粘土弹塑性结构模型

IF 4.2 2区工程技术 Q1 ENGINEERING, GEOLOGICAL

Soil Dynamics and Earthquake Engineering

Pub Date : 2024-11-08 DOI: 10.1016/j.soildyn.2024.109052

Lu Chen , Chengshun Xu , Guosheng Wang , Yilong Sun , Kaiyuan Liu

Offshore wind turbines (OWTs) are subjected to long-term cyclic loading, such as wind and wave loading, leading to axial-torsional bidirectional cyclic loading in the pile surrounding soil. This bidirectional cyclic loading results in the cumulative deformation of the pile foundation. The larger cumulative deformation endangers the operational safety of the wind turbine system. In China, offshore wind farms mainly consist of clay layers and their cyclic mechanical characteristics need to be examined. Therefore, a series of bidirectional cyclic loading tests are carried out by using a hollow cylindrical torsional shear apparatus to investigate the effect of different cyclic stress levels on the cumulative strain. The results revealed that cumulative strains stabilize as the cycles increase when the cyclic stress level is less than the critical cyclic stress level. An empirical model based on the test results is developed to reflect the cumulative deformation characteristic. In the bounding surface constitutive model, the plastic modulus interpolation function is improved by using the established empirical model,the effect of loading and unloading routes on the variation of plastic modulus is investigated. Furthermore, a modified constitutive model is used to predict the cumulative deformation of soil under the effect of bidirectional cyclic loading. The predicted results agree well with the findings achieved from the tests.

海上风力涡轮机（OWT）长期承受循环荷载，如风浪荷载，导致桩周围土壤产生轴向-扭转双向循环荷载。这种双向循环荷载会导致桩基产生累积变形。较大的累积变形会危及风机系统的运行安全。在中国，海上风电场主要由粘土层组成，需要对其循环力学特性进行研究。因此，利用空心圆柱扭剪仪进行了一系列双向循环加载试验，研究不同循环应力水平对累积应变的影响。结果表明，当循环应力水平小于临界循环应力水平时，随着循环次数的增加，累积应变趋于稳定。根据试验结果建立了一个经验模型，以反映累积变形特征。在边界面构成模型中，利用已建立的经验模型改进了塑性模量插值函数，并研究了加载和卸载路线对塑性模量变化的影响。此外，还利用修改后的构成模型预测了双向循环荷载作用下土壤的累积变形。预测结果与试验结果十分吻合。

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引用次数: 0

Parameterized fragility-based uncertainty influence quantification and sensitivity analysis methodology: Concept, formulation, and application 基于参数的脆性不确定性影响量化和敏感性分析方法：概念、制定和应用

IF 4.2 2区工程技术 Q1 ENGINEERING, GEOLOGICAL

Soil Dynamics and Earthquake Engineering

Pub Date : 2024-11-06 DOI: 10.1016/j.soildyn.2024.109070

Kaisen Fu , Aijun Ye , Lianxu Zhou

Uncertainty modeling is a crucial issue in the seismic risk and resilience assessment of structures and infrastructures. Understanding and quantifying the impact of structural model parameter uncertainty (i.e., the epistemic uncertainty) on seismic fragility of structures are still open issues in the field of earthquake engineering. To this end, this study proposes a parameterized fragility-based methodology to quantify and rank the influence of multiple model parameter uncertainties on the seismic fragility result when their uncertainty is simultaneously involved. The concept and detailed procedure of this methodology is first introduced in this study. After that, the proposed methodology is applied to a case study bridge, i.e., unbonded laminated rubber bearing (ULRB) supported highway bridge retrofitted with transverse steel damper (TSD), to investigate how the uncertainty of the concerned model parameters affects the seismic fragility of the selected benchmark bridge when separately using the residual and peak displacements as engineering demand parameters (EDPs). The parameter sensitivity of fragility corresponding to these two EDPs is then quantified by a new proposed index and ranked using Tornado diagrams. In addition, the seismic fragility result when considering different sources of uncertainty is compared and discussed in this study through the parameterized fragility model. The result shows whether considering the uncertainty of model parameters has a more considerable influence on the fragility result when using the residual displacement as EDP as compared with using peak displacement as EDP. The sensitivity ranking of the parameters is affected by the damage level or the nonlinearity of the structural system. Regarding the residual and peak bearing displacements of ULRB-supported highway bridges, the friction coefficient is the most sensitive parameter.

不确定性建模是结构和基础设施地震风险和抗震性评估中的一个关键问题。理解和量化结构模型参数不确定性（即认识不确定性）对结构抗震脆性的影响仍是地震工程领域的未决问题。为此，本研究提出了一种基于参数化脆性的方法，用于量化和排序同时涉及多个模型参数不确定性时对地震脆性结果的影响。本研究首先介绍了该方法的概念和详细步骤。然后，将所提出的方法应用于案例研究桥梁，即采用横向钢阻尼器（TSD）加装的无粘结层叠橡胶支座（ULRB）公路桥，研究在分别使用残余位移和峰值位移作为工程需求参数（EDP）时，相关模型参数的不确定性如何影响所选基准桥梁的地震脆性。与这两个 EDPs 相对应的脆性参数敏感性通过一个新提出的指数进行量化，并使用龙卷风图进行排序。此外，本研究还通过参数化脆性模型对考虑不同不确定性来源时的地震脆性结果进行了比较和讨论。结果表明，与使用峰值位移作为 EDP 相比，使用残余位移作为 EDP 时，考虑模型参数的不确定性对脆性结果的影响更大。参数的灵敏度排序受结构系统的破坏程度或非线性影响。就超限梁支承公路桥梁的残余位移和峰值支承位移而言，摩擦系数是最敏感的参数。

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引用次数: 0

Utilizing tuned mass damper for reduction of seismic pounding between two adjacent buildings with different dynamic characteristics 利用调谐质量阻尼器减少两栋具有不同动态特性的相邻建筑之间的地震冲击

IF 4.2 2区工程技术 Q1 ENGINEERING, GEOLOGICAL

Soil Dynamics and Earthquake Engineering

Pub Date : 2024-11-04 DOI: 10.1016/j.soildyn.2024.109036

Reza Kamgar , Masoud Dadkhah , Heisam Heidarzadeh , Mahmoud Seidali Javanmardi

Today, population growth and the need for constructing adjacent buildings have raised the likelihood of pounding between adjacent buildings with different dynamic characteristics. The pounding force applied to adjacent buildings during an earthquake is intensive and may cause total or partial damage to structural elements, leading to collapse. It disturbs and complicates the functioning of buildings during and after an earthquake. Therefore, the main aim of this paper is to minimize and, if possible, eliminate the pounding force between two adjacent structures by considering three objective functions. For this aim, the tuned mass damper is utilized here. Also, this paper aims to reduce the number of collisions between different stories of adjacent buildings through a tuned mass damper system. For this purpose, two adjacent steel moment frames with six and ten stories are nonlinearly modeled and validated using the concentrated plasticity model in OpenSees. Moreover, the pounding element is nonlinearly modeled and validated. Then, tuned mass dampers (TMDs) are used on the roofs of the structures. They are optimized in stiffness, mass, and damping coefficient using the grey wolf optimization (GWO) algorithm. Nonlinear time history analysis (NLTHA) is performed under nine far- and near-field earthquakes. The pounding force and structural responses are analyzed, including maximum story acceleration, maximum inter-story drift, and base shear in the TMD-controlled and uncontrolled adjacent buildings. Finally, the Park-Ang damage index is evaluated for the structures with and without the TMD system. It has been found that the maximum pounding force, the maximum acceleration of the stories, the base shear, the drift ratio, and the number of collisions significantly reduce (or omit) in the presence of TMDs when the objective function is considered to be the minimization of the maximum pounding force. It is shown that the maximum pounding force generally declines to zero for this objective function.

如今，人口增长和建造相邻建筑物的需要提高了具有不同动态特性的相邻建筑物之间发生撞击的可能性。地震时对相邻建筑物施加的冲击力非常大，可能会对结构构件造成全部或部分破坏，导致倒塌。它干扰了建筑物在地震期间和震后的功能，并使之复杂化。因此，本文的主要目的是通过考虑三个目标函数，尽量减小并在可能的情况下消除两个相邻结构之间的冲击力。为此，本文采用了调谐质量阻尼器。此外，本文还旨在通过调谐质量阻尼器系统减少相邻建筑物不同楼层之间的碰撞次数。为此，本文使用 OpenSees 中的集中塑性模型对两栋相邻的六层和十层钢矩形框架进行了非线性建模和验证。此外，还对重击元素进行了非线性建模和验证。然后，在结构的屋顶上使用了调谐质量阻尼器（TMD）。使用灰狼优化（GWO）算法对其刚度、质量和阻尼系数进行了优化。在九次远场和近场地震中进行了非线性时间历程分析（NLTHA）。分析了冲击力和结构响应，包括 TMD 受控和未受控相邻建筑物的最大层加速度、最大层间漂移和基底剪力。最后，评估了有 TMD 系统和无 TMD 系统结构的 Park-Ang 损坏指数。研究发现，当目标函数被视为最大冲击力的最小化时，在有 TMD 的情况下，最大冲击力、楼层的最大加速度、基底剪力、漂移比和碰撞次数都会显著减少（或消失）。结果表明，在此目标函数下，最大冲击力一般会降至零。

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引用次数: 0

Seismic demand-oriented design of hybrid base-isolated building with the tuned inerter eddy current damper 采用调谐感应器涡流阻尼器的混合式基础隔震建筑的地震需求导向设计

IF 4.2 2区工程技术 Q1 ENGINEERING, GEOLOGICAL

Soil Dynamics and Earthquake Engineering

Pub Date : 2024-11-04 DOI: 10.1016/j.soildyn.2024.109068

Dawei Li , He Bai , Yu Lou , Jianping Han

A novel tuned inerter eddy current damper (TIECD) is proposed to mitigate isolator deformation in a base isolation (BI) system subjected to earthquake ground motions. Considering the topological similarity and damping equivalent criteria, the design formulations of the tuned inerter damper are extended to determine the optimal parameters of the TIECD. A combination of iterative updating, response-spectrum analysis, and complex complete quadratic-combination measures is established to realize the seismic demand-oriented design framework of the TIECD. Furthermore, the proposed design framework incorporates the equivalent stiffness and damping of a lead rubber bearing to approximate the design parameters of the TIECD in a nonlinear BI system. Finally, the feasibility and effectiveness of the designed TIECD are validated using a nine–story base isolated benchmark model with lead rubber bearings. Numerical simulation results indicate that the designed TIECD can significantly suppress the displacement, acceleration, and base shear demands of the hybrid BI system. Compared with the viscous damping in the tuned inerter damper, the designed TIECD exhibits a significantly enhanced level of damping owing to the combination of a lower damping force and a larger deformation.

本文提出了一种新型的调谐电感涡流阻尼器 (TIECD)，用于减轻受地震地面运动影响的基础隔震系统中的隔震器变形。考虑到拓扑相似性和阻尼等效标准，扩展了调谐电感阻尼器的设计公式，以确定 TIECD 的最佳参数。结合迭代更新、响应谱分析和复杂的完全二次组合措施，建立了以地震需求为导向的 TIECD 设计框架。此外，所提出的设计框架还结合了铅橡胶支座的等效刚度和阻尼，以近似非线性 BI 系统中 TIECD 的设计参数。最后，使用带铅橡胶支座的九层底座隔离基准模型验证了所设计 TIECD 的可行性和有效性。数值模拟结果表明，设计的 TIECD 可以显著抑制混合 BI 系统的位移、加速度和基底剪切力需求。与调谐插入式阻尼器中的粘滞阻尼相比，设计的 TIECD 由于结合了较低的阻尼力和较大的变形，因此阻尼水平明显提高。

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引用次数: 0

Self-centering rocking steel frame with column mid-height uplift: Experimental and numerical investigation 自定心摇动钢架与支柱中高上移：实验和数值研究

IF 4.2 2区工程技术 Q1 ENGINEERING, GEOLOGICAL

Soil Dynamics and Earthquake Engineering

Pub Date : 2024-11-02 DOI: 10.1016/j.soildyn.2024.109065

Yan Guo , Ming Lian , Yuhao Zhou , Mingzhou Su

This paper proposes a self-centering rocking steel frame with column mid-height uplift (SCRSF-CMU) that exhibits high post-yield stiffness and energy dissipation capacity. The hysteretic performance of the SCRSF-CMU was investigated through cyclic loading tests. A numerical model of the SCRSF-CMU was established and validated against experimental results. Subsequently, the seismic performance of the SCRSF-CMU was compared with that of the self-centering rocking steel frame with column base uplift (SCRSF-CBU) using nonlinear time history analysis. Finally, the seismic responses of the SCRSF-CMU and SCRSF-CBU under varying earthquake intensities were analyzed using the endurance time analysis. The results indicate that the designed SCRSF-CMU demonstrates excellent lateral force resistance, energy dissipation, and self-centering capabilities. The rocking effect and the restoring force of the post-tensioned steel strands effectively controlled the residual lateral displacement of the specimens. The multi-scale numerical model of the SCRSF-CMU accurately captured its hysteretic behavior and deformation patterns. Compared to the SCRSF-CBU, the SCRSF-CMU exhibited superior rocking deformation capacity, post-yield stiffness, and hysteretic energy dissipation. Under MCE excitation, both SCRSF-CMU and SCRSF-CBU showed uniform inter-story drift distribution with minimal residual deformation, creating a satisfactory condition for the post-earthquake repair work if necessary. The high post-yield stiffness of the SCRSF-CMU was more effective in reducing both maximum and residual displacements. Endurance time analysis revealed that SCRSF-CMU and SCRSF-CBU exhibited relatively uniform inter-story drift distribution under SLE, DBE, and MCE earthquakes. Under FE excitation, the inter-story drift ratio of both structures were nearly identical; however, under DBE and MCE excitations, the maximum roof drift ratio and inter-story drift ratio of the SCRSF-CBU were larger, indicating that the SCRSF-CBU had higher deformation demands than the SCRSF-CMU.

本文提出了一种具有支柱中高上移功能的自定心摇摆钢框架（SCRSF-CMU），该框架具有较高的屈服后刚度和消能能力。通过循环加载试验研究了 SCRSF-CMU 的滞后性能。建立了 SCRSF-CMU 的数值模型，并根据实验结果进行了验证。随后，利用非线性时间历程分析，将 SCRSF-CMU 的抗震性能与柱基上移自定心摇摆钢框架（SCRSF-CBU）的抗震性能进行了比较。最后，利用耐久时间分析法分析了 SCRSF-CMU 和 SCRSF-CBU 在不同地震烈度下的地震响应。结果表明，设计的 SCRSF-CMU 具有出色的抗侧向力、消能和自定中心能力。后张法钢绞线的摇晃效应和恢复力有效地控制了试件的残余侧向位移。SCRSF-CMU 的多尺度数值模型准确捕捉了其滞后行为和变形模式。与 SCRSF-CBU 相比，SCRSF-CMU 在摇摆变形能力、屈服后刚度和滞回消能方面都表现出更优越的性能。在 MCE 激振下，SCRSF-CMU 和 SCRSF-CBU 的层间漂移分布均匀，残余变形极小，为必要的震后修复工作创造了有利条件。SCRSF-CMU 的后屈服刚度高，能更有效地减少最大位移和残余位移。耐震时间分析表明，在 SLE、DBE 和 MCE 地震中，SCRSF-CMU 和 SCRSF-CBU 的层间漂移分布相对均匀。在 FE 地震激励下，两种结构的层间漂移比几乎相同；但在 DBE 和 MCE 地震激励下，SCRSF-CBU 的最大屋顶漂移比和层间漂移比更大，表明 SCRSF-CBU 比 SCRSF-CMU 有更高的变形要求。

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引用次数: 0

Hysteretic behavior of a cross-laminated timber building incorporating different energy dissipators 包含不同消能装置的交叉层压木材建筑的滞后行为

IF 4.2 2区工程技术 Q1 ENGINEERING, GEOLOGICAL

Soil Dynamics and Earthquake Engineering

Pub Date : 2024-11-01 DOI: 10.1016/j.soildyn.2024.109038

Tongchen Han , Lisa Tobber , Geoffrey Rodgers , Solomon Tesfamariam

Large-scale experiments on timber structures, incorporating damping devices, showed high-intensity earthquakes can be resisted. This paper compares cyclic response of a two-story cross-laminated timber (CLT) building with three different dampers: resilient slip friction joint (RSFJ), lead extrusion damper (LED), and linear friction damper (LFD). A CLT building with conventional hold-downs and angle brackets experimental work was used as a benchmark to validate the high-fidelity finite element model. Subsequently, the numerical model was extended to account for the three dampers. Re-centering efficiency, i.e., expected flag-shaped hysteretic response, of the RSFJ was ensured by increasing the shear strength of hold-downs. Buildings with LFD and LED have greater energy dissipation capacity when compared to buildings with conventional hold-downs. Improved energy dissipations were also observed in two buildings when increasing the shear strength of angle bracket or applying the rigid connections in the 2nd story. Finally, the performances of buildings with different dampers were evaluated.

对木结构进行的大规模实验表明，采用阻尼装置的木结构可以抵御高强度地震。本文比较了带有三种不同阻尼器（弹性滑动摩擦接头（RSFJ）、铅挤压阻尼器（LED）和线性摩擦阻尼器（LFD））的两层交叉层压木材（CLT）建筑的周期响应。采用传统固定装置和角托架的 CLT 建筑实验工作被用作验证高保真有限元模型的基准。随后，对数值模型进行了扩展，以考虑这三种阻尼器。通过提高支撑杆的抗剪强度，确保了 RSFJ 的重新定心效率，即预期的旗形滞后响应。与使用传统支撑的建筑物相比，使用 LFD 和 LED 的建筑物具有更强的能量耗散能力。在提高角钢支架的抗剪强度或在第二层采用刚性连接时，两栋建筑的消能性能也得到了改善。最后，对采用不同阻尼器的建筑物的性能进行了评估。

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引用次数: 0

Seismic performance improvement of base-isolated liquid storage tank based on positive and negative stiffness under different definitions of ground motion duration 在不同地动持续时间定义下，基于正刚度和负刚度改善基底隔震液体储罐的抗震性能

IF 4.2 2区工程技术 Q1 ENGINEERING, GEOLOGICAL

Soil Dynamics and Earthquake Engineering

Pub Date : 2024-11-01 DOI: 10.1016/j.soildyn.2024.109061

Wei Jing , Fangdie Hu , Yixin Zhang , Shushuang Song

As one of the three important characteristics of ground motion, the impact of ground motion duration on the dynamic responses of structures necessitates further in-depth research. Seven different definitions of ground motion duration are selected. The three-dimensional numerical calculation models of non-damping liquid storage tank (LST), rubber-isolated LST, isolated LST based on positive and negative stiffness in parallel, and isolated LST based on positive and negative stiffness in series-parallel are established by ADINA, and the dynamic responses of the different LSTs under earthquakes with different definitions of ground motion duration are comparatively studied. The results show that the influence of different definitions of ground motion duration on the dynamic responses of LST can not be neglected. The dynamic responses are larger under the long-duration ground motion compared to the short-duration ground motions, besides, and the three types of isolation exhibit better performance under long-duration ground motions than under short-duration ground motions. The damping effect of the positive and negative stiffness in series-parallel is the best. The rubber isolation has an amplifying effect on the liquid sloshing wave height, while the isolated system with negative stiffness can make up for this deficiency. Reasonable arrangement of negative stiffness device in isolation layer of LST is helpful to realize dual control of structure responses and liquid sloshing wave height.

作为地动的三个重要特征之一，地动持续时间对结构动态响应的影响需要进一步深入研究。本文选取了七种不同的地震动持续时间定义。利用 ADINA 建立了无阻尼储液罐（LST）、橡胶隔震储液罐、基于正负刚度并联的隔震储液罐、基于正负刚度串并联的隔震储液罐的三维数值计算模型，比较研究了不同地动持续时间定义下不同储液罐在地震作用下的动力响应。结果表明，不同地动持续时间定义对 LST 动态响应的影响不容忽视。此外，与短历时地动相比，长历时地动下的动态响应更大，而且三种类型的隔震在长历时地动下比在短历时地动下表现出更好的性能。正负刚度串并联的阻尼效果最好。橡胶隔震对液体荡波高度有放大作用，而具有负刚度的隔震系统可以弥补这一不足。在 LST 隔离层中合理布置负刚度装置有助于实现结构响应和液体荡波高度的双重控制。

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引用次数: 0

A novel horizontal universal viscous damping amplification device and seismic response analysis 新型水平通用粘性阻尼放大装置和地震响应分析

IF 4.2 2区工程技术 Q1 ENGINEERING, GEOLOGICAL

Soil Dynamics and Earthquake Engineering

Pub Date : 2024-10-31 DOI: 10.1016/j.soildyn.2024.109062

Chao Bao , Mengfan Han , Pengcheng Bai , Qi Fan , Weiqiang Wang , Xiaotong Ma , Jianning Lv , Kar Sing Lim

The application of damping amplification technology to dampers can effectively enhance the energy dissipation efficiency and address the issue of underutilization during small displacements. In this study, a novel horizontal universal damping amplification device (HUDAD) is proposed, and its construction and operational mechanism are detailed. A restoring-force model for the horizontal universal viscous damping amplification device (HUDAD-VD) is derived, which integrates viscous dampers, establishing its equations of motion and energy balance. Furthermore, pseudo-static tests are conducted to validate the damping amplification and energy dissipation capabilities of the HUDAD-VD. Finally, a seismic response analysis of a multi-degree-of-freedom damping system incorporating the HUDAD-VD is performed to evaluate its seismic performance. The results show the close alignment between the experimental and theoretical hysteretic curves of the HUDAD-VD, confirming the accuracy of the theoretical model. The HUDAD-VD demonstrates effective damping performance under all levels of seismic action, successfully controlling the displacement within the seismic isolation layer. In particular, the HUDAD exhibits a satisfactory amplification effect, effectively enhancing the damper energy dissipation.

将阻尼放大技术应用于阻尼器可有效提高能量耗散效率，并解决小位移时利用率不足的问题。本研究提出了一种新型水平通用阻尼放大装置（HUDAD），并详细介绍了其构造和运行机制。推导出了水平通用粘滞阻尼放大装置（HUDAD-VD）的恢复力模型，该模型集成了粘滞阻尼器，建立了其运动方程和能量平衡方程。此外，还进行了伪静力试验，以验证 HUDAD-VD 的阻尼放大和能量耗散能力。最后，对包含 HUDAD-VD 的多自由度阻尼系统进行了地震响应分析，以评估其抗震性能。结果表明，HUDAD-VD 的实验和理论滞回曲线非常吻合，证实了理论模型的准确性。HUDAD-VD 在各级地震作用下均表现出有效的阻尼性能，成功地控制了隔震层内的位移。特别是，HUDAD 表现出令人满意的放大效果，有效增强了阻尼器的耗能能力。

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引用次数: 0

A new algorithm for ground motion selection based on target smooth spectrum using spectral shape parameters 基于目标平滑频谱、使用频谱形状参数进行地动选择的新算法

IF 4.2 2区工程技术 Q1 ENGINEERING, GEOLOGICAL

Soil Dynamics and Earthquake Engineering

Pub Date : 2024-10-31 DOI: 10.1016/j.soildyn.2024.109060

Cuihua Li , Huimin Hong , Jiayi Zheng

Ground motion selection is a pivotal step in the performance-based seismic design and assessments, because it bridges the gap between seismic hazard and structural response. Presently one prevalent practice involves constructing target spectra for the selection of ground motion records. This paper introduces a novel method to construct the target spectrum, transformed the acceleration response spectrum into a normalized spectrum β multiplied by PGA where β = Sa/PGA. The normalized spectrum is smoothed to obtain the spectral shape parameters used to construct the target smooth spectrum for ground motion selection. Two sets of ground motions, selected using the proposed method and CS, are subsequently employed in the analysis of a six-story, five-span building model to assess the structural fragility and the associated seismic risk to examine the efficiency of the proposed method. Results indicated that the probability of exceeding the Life Safety (LS) performance level is lower for CS compared to the proposed approach. Seismic risk curve derived from the proposed methodology, however, is close to those obtained through CS. In conclusion, the proposed methodology effectively mitigates the limitations inherent in the conventional ground motion selection approaches and allow the performance of structures to be determined at a more realistic scale.

地震动选择是基于性能的抗震设计和评估的关键步骤，因为它在地震灾害和结构响应之间架起了桥梁。目前，一种普遍的做法是构建目标谱来选择地震动记录。本文介绍了一种构建目标频谱的新方法，将加速度反应频谱转化为标准化频谱 β 乘以 PGA，其中 β = Sa/PGA。对归一化频谱进行平滑处理，以获得用于构建目标平滑频谱的频谱形状参数，从而进行地面运动选择。随后，在对一个六层五跨建筑模型进行分析时，采用了利用建议方法和 CS 方法选择的两组地面运动，以评估结构脆性和相关地震风险，从而检验建议方法的效率。结果表明，与建议的方法相比，CS 方法超过生命安全（LS）性能水平的概率较低。然而，建议方法得出的地震风险曲线与 CS 得出的曲线接近。总之，建议的方法有效地缓解了传统地面运动选择方法固有的局限性，使结构性能的确定更加切合实际。

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引用次数: 0

Simulating multi-component near-fault ground motion record containing pulse-like component 模拟包含脉冲样成分的多成分近断层地动记录

IF 4.2 2区工程技术 Q1 ENGINEERING, GEOLOGICAL

Soil Dynamics and Earthquake Engineering

Pub Date : 2024-10-30 DOI: 10.1016/j.soildyn.2024.109032

X.H. Jiang , H.P. Hong , J.D. Ren

Parametric models have been developed in the literature to simulate the near-fault seismic ground motion record component containing the pulse-like (PL) motion. However, the limited number of recorded records used to develop parametric models results in significant statistical uncertainty. An alternative method to simulate synthetic records with the PL component is the seed-record based approach. In this study, we propose the use of the iterative power and amplitude correction algorithm, along with three different transforms, to simulate the tri-component record containing the PL component. The approach requires a seed tri-component near-fault seismic ground motion record with the PL component. We compare the seed and simulated tri-component record in terms of the power distribution, coherence, velocity and displacement time histories, and response spectrum. The comparison is aimed at determining if the sampled record obtained using this approach can produce velocity and displacement time histories that are consistent with and have the same “natural variation and look" as the seed record. For the assessment, we treat a recorded record as a seed record. We also utilize a rotated version of the recorded record as the seed record, where one rotated record component in the horizontal plane is associated with the identified PL component. The numerical analysis results demonstrate a close match between the sampled records and the seed record in terms of velocity and displacement time histories, as well as the response spectrum and coherence characteristics.

文献中已经建立了参数模型来模拟包含脉冲样（PL）运动的近断层地震地动记录成分。然而，用于开发参数模型的记录数量有限，导致统计不确定性很大。基于种子记录的方法是模拟包含类脉冲运动的合成记录的另一种方法。在这项研究中，我们建议使用迭代功率和振幅校正算法以及三种不同的变换来模拟包含 PL 分量的三分量记录。该方法需要一个包含 PL 分量的种子三分量近断层地震地动记录。我们从功率分布、相干性、速度和位移时间历程以及反应谱等方面对种子记录和模拟的三分量记录进行比较。比较的目的是确定使用这种方法获得的采样记录是否能产生与种子记录一致并具有相同 "自然变化和外观 "的速度和位移时间历程。在评估中，我们将记录视为种子记录。我们还利用记录的旋转版本作为种子记录，其中水平面上的一个旋转记录分量与已识别的 PL 分量相关联。数值分析结果表明，采样记录和种子记录在速度和位移时间历程以及响应谱和相干性特征方面非常吻合。

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