Dynamic soil-structure interaction of a shallow founded shear frame and a frame equipped with viscous dampers under seismic loading

Boksmati, Jad I.; Madabhushi, Gopal; Thusyanthan, Indrasenan

doi:10.1016/j.engstruct.2020.111388

Cited by 11 publications

(3 citation statements)

References 22 publications

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“…In addition, the soil−structure interaction usually is not considered in pipeline and box culverts designs, where the applied pressure above the pipeline and the box culvert is assumed to be equivalent to the geostatic load, which is the earth prism weight measured above the pipeline or the box culvert (Pimentel et al, 2009 [7]). As the soil−structure interaction is challenging to experimentally estimate, several studies have efficiently exploited numerical tools such as finite element modeling and artificial intelligence to predict the effect of the soil−structure interaction for various structural types [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. Therefore, the soil−structural interaction should be included in the pipeline and culvert design in order to estimate the structural response of such infrastructures accurately.…”

Section: Introductionmentioning

confidence: 99%

“…The total required FSR and the maximum deflection (∆ max ) of each pipe were recorded. 4) 152 ( 6) 152 ( 6) 152 ( 6) 152 ( 6) 254 ( 10) 203 (8) 203 ( 8) 178 ( 7) 305 ( 12) --254 (10) -15.2 (49.9) 102 ( 4) 203 ( 8) 190 (7.5) 152 ( 6) 152 ( 6) 254 ( 10) 305 ( 12) 215 (8.5) 203 ( 8 6) 152 ( 6) 152 ( 6) 127 ( 5) 254 ( 10) 203 ( 8) 210 (8.3) 152 ( 6 As discussed in Step 3 in the procedure mentioned above, the shear reinforcement was omitted. Furthermore, it was excluded because the ratio of applied-to-capacity shear stress was equal to or less than unity.…”

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confidence: 99%

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Optimization of the Structural Performance of Buried Reinforced Concrete Pipelines in Cohesionless Soils

et al. 2022

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Pipelines are widely used to transport water, wastewater, and energy products. However, the recently published American Society of Civil Engineers report revealed that the USA drinking water infrastructure is deficient, where 12,000 miles of pipelines have deteriorated. This would require substantial financial investment to rebuild. Furthermore, the current pipeline design practice lacks the guideline to obtain the optimum steel reinforcement and pipeline geometry. Therefore, the current study aimed to fill this gap and help the pipeline designers and practitioners select the most economical reinforced concrete pipelines with optimum steel reinforcement while satisfying the shear stresses demand and serviceability limitations. Experimental testing is considered uneconomical and impractical for measuring the performance of pipelines under a high soil fill depth. Therefore, a parametric study was carried out for reinforced concrete pipes with various diameters buried under soil fill depths using a reliable finite element analysis to execute this investigation. The deflection range of the investigated reinforced concrete pipelines was between 0.5 to 13 mm. This indicates that the finite element analysis carefully selected the pipeline thickness, required flexural steel reinforcement, and concrete crack width while the pipeline does not undergo excessive deformation. This study revealed that the recommended optimum reinforced concrete pipeline diameter-to-thickness ratio, which is highly sensitive to the soil fill depth, is 6.0, 4.6, 4.2, and 3.8 for soil fill depths of 9.1, 12.2, 15.2, and 18.3 m, respectively. Moreover, the parametric study results offered an equation to estimate the optimum pipeline diameter-to-thickness ratio via a design example. The current research outcomes are imperative for decision-makers to accurately evaluate the structural performance of buried reinforced concrete pipelines.

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%

Optimization of the Structural Performance of Buried Reinforced Concrete Pipelines in Cohesionless Soils

et al. 2022

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“…Although SSI may be beneficial to conventional structural design due to the introduced period lengthening and damping increase [8][9][10][11][12], its influence on structural dynamic properties could lead to detuning and, therefore, could be detrimental if TMDs are designed without considering SSI [13][14][15][16][17][18][19]. Moreover, the SSI effect is typically much more significant for high-rise buildings, where TMDs are generally widely used [17].…”

Section: Introductionmentioning

confidence: 99%

Optimal Design Formula for Tuned Mass Damper Based on an Analytical Solution of Interaction between Soil and Structure with Rigid Foundation Subjected to Plane SH-Waves

Jin

Lin

et al. 2022

Buildings

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The tuned mass damper (TMD) is widely used for vibration mitigation, especially in high-rise buildings where significant soil-structure interaction (SSI) effects are usually involved. This creates a need to consider SSI effects in TMD design. In this work, a novel design framework for TMD systems with SSI effects is proposed. For response evaluations, structure-TMD systems are modeled as a two-degrees-of-freedom (2DOF) system, standing on a rigid foundation and subject to out-of-plane SH seismic wave inputs in a homogeneous half-space. Closed-form analytical solutions of its displacement and acceleration responses are derived, and the H2-norm of the system transfer function is introduced to quantify the performances of TMDs. The TMD design problem is then formulated and solved by optimizing the performances. Considering that aspects other than response mitigation, e.g., strokes, damper device costs, etc., may be critical to TMD damping ratios, a design framework is developed by firstly making an informed selection on TMD damping ratios, and subsequently tuning TMD frequency ratios through calibrated formulae. In addition, TMD strokes versus TMD damping ratios are investigated to facilitate the determination of TMD damping ratios. A case study based on a real-existing building system is carried out to illustrate the application of the proposed design framework. The framework has proven to be highly efficient and effective and suitable to for use in practical engineering.

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Combined Effect of Bearing Stiffness of the Base Isolator and Damping Characteristics of the Viscous Damper on the Nonlinear Response of Buildings

2022

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Dynamic soil-structure interaction of a shallow founded shear frame and a frame equipped with viscous dampers under seismic loading

Cited by 11 publications

References 22 publications

Optimization of the Structural Performance of Buried Reinforced Concrete Pipelines in Cohesionless Soils

Optimization of the Structural Performance of Buried Reinforced Concrete Pipelines in Cohesionless Soils

Optimal Design Formula for Tuned Mass Damper Based on an Analytical Solution of Interaction between Soil and Structure with Rigid Foundation Subjected to Plane SH-Waves

Combined Effect of Bearing Stiffness of the Base Isolator and Damping Characteristics of the Viscous Damper on the Nonlinear Response of Buildings

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