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Behavior of Vertically Confined Square Footing on Reinforced Sand under Centric Inclined Loading 中心倾斜荷载作用下加筋土上竖向约束方形基础的性能
IF 0.6
Studia Geotechnica et Mechanica Pub Date : 2022-07-27 DOI: 10.2478/sgem-2022-0012
B. Kirtimayee, N. K. Samadhiya
{"title":"Behavior of Vertically Confined Square Footing on Reinforced Sand under Centric Inclined Loading","authors":"B. Kirtimayee, N. K. Samadhiya","doi":"10.2478/sgem-2022-0012","DOIUrl":"https://doi.org/10.2478/sgem-2022-0012","url":null,"abstract":"Abstract This study presents the behavior of vertically confined square footing on geogrid-reinforced sand under centric inclined loading through a series of experimental tests. The load was applied at 5°, 10° and 20° angles of inclination with the vertical. The tests were conducted on surface footing, footing with confiner and footing with confiner and horizontal reinforcement configurations subjected to inclined loading. Parametric variations like depth of the confiner (d=1B, 1.5B, 2B), number of geogrid layers (N; varies with variation in depth of confiner), and spacing between horizontal reinforcements (Y=0.25B, 0.5B, 0.75B, 1B) have been investigated at the top surface dimension of confiner (D) as 1.0B, 1.5B and 2.0B (where B is the width of the model footing). Results show that combined effect of confiner and horizontal reinforcement increases the ultimate bearing capacity of footing significantly compared to only confiner for all angle of inclinations. It can also be observed that load bearing capacities decrease with increase in angles of inclination and record the minimum improvement at 20° angle of inclination. Improvement in bearing capacities and reduction in settlement of footing analyzed in terms of bearing capacity ratio (BCR) and settlement reduction factor (SRF) are compared for all footing configurations. To summarize, the test results showed that confiner along with reinforcement can be considered as an economic ground improvement technique for shallow foundations to counter against heavily inclined loading.","PeriodicalId":44626,"journal":{"name":"Studia Geotechnica et Mechanica","volume":"44 1","pages":"224 - 238"},"PeriodicalIF":0.6,"publicationDate":"2022-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43426416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Case studies on Q-slope method use for slope stability analyses Q斜率法用于边坡稳定性分析的实例研究
IF 0.6
Studia Geotechnica et Mechanica Pub Date : 2022-07-27 DOI: 10.2478/sgem-2022-0010
E. Komurlu
{"title":"Case studies on Q-slope method use for slope stability analyses","authors":"E. Komurlu","doi":"10.2478/sgem-2022-0010","DOIUrl":"https://doi.org/10.2478/sgem-2022-0010","url":null,"abstract":"Abstract The use of the Q-slope value is a relatively new approach for the stability investigations of rock slopes. In this study, four different slopes in Giresun and Ordu cities of Turkey were investigated to assess whether the Q-slope approach is usable for varying slope heights, or not. A back analysis was carried out for a landslide in a case study quarry located in Kovanlik municipality of Giresun city. Carrying out detailed investigations on the geotechnical drill cores and the field studies, the Q-slope value of the rock mass of the Kovanlik quarry was determined as 0.58. According to the Q-slope approach, the slope which had a landslide under the case of 49° general slope angle and 225 m height should have been stable at a general slope angle of 59°. It has been found that the Q-slope approach is not favorable for a high slope with the height of 225 m. Two roadway excavations with steep slope angles and low heights smaller than 25 m were also investigated within this study. According to the Q-slope value, the roadway slopes which are stable for more than 3 years are estimated to be unstable. Therefore, the Q-slope approach was found also misleading for slopes with low heights like those under 25 m. On the other hand, the Q-slope method usability is confirmed obtaining parallel results with the observations from another case study slope with a height of 78 m. Although it has become a popular empirical method in the recent years, it is recommended to revise the Q-slope approach or limit its use depending on the slope height parameter.","PeriodicalId":44626,"journal":{"name":"Studia Geotechnica et Mechanica","volume":"44 1","pages":"190 - 197"},"PeriodicalIF":0.6,"publicationDate":"2022-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49606837","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Observation Method in the Control of Stacker Capacity Under Landslide Hazard – A Case Study 滑坡灾害下堆垛机承载力控制的观测方法——以滑坡灾害为例
IF 0.6
Studia Geotechnica et Mechanica Pub Date : 2022-07-27 DOI: 10.2478/sgem-2022-0013
Miłosz Bąk, I. Bagińska
{"title":"Observation Method in the Control of Stacker Capacity Under Landslide Hazard – A Case Study","authors":"Miłosz Bąk, I. Bagińska","doi":"10.2478/sgem-2022-0013","DOIUrl":"https://doi.org/10.2478/sgem-2022-0013","url":null,"abstract":"Abstract The article presents both an application and the purpose of the observation method in the control of stacker capacity. It lists the types of the measured (observed) quantities, which serve as a basis for the observation method. It also describes the procedure of the method and discusses its individual steps. It further provides examples of applying the method in defining the capacity levels of a stacking machine ZGOT-11500, based on the recorded surface and subsurface soil displacement values. The article also offers the increment values and speeds for the individual parameters, which serve as a warning against deterioration of the geotechnical condition of the soil. Knowledge of the relationships between the parameters that describe soil deformation and the required defined stacker capacity may serve as a basis for further research and experiments on the observation method, which may increase the safety of stacking operations. The analysis was based on the results of geotechnical and geodetic measurements, as well as on the operating parameters of the stacker, acquired over a period of 5 months.","PeriodicalId":44626,"journal":{"name":"Studia Geotechnica et Mechanica","volume":"44 1","pages":"239 - 251"},"PeriodicalIF":0.6,"publicationDate":"2022-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45450076","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Probabilistic Liquefaction Analysis Using Standard Penetration Test 基于标准穿透试验的概率液化分析
IF 0.6
Studia Geotechnica et Mechanica Pub Date : 2022-06-01 DOI: 10.2478/sgem-2022-0009
F. Kamel, S. Badreddine
{"title":"Probabilistic Liquefaction Analysis Using Standard Penetration Test","authors":"F. Kamel, S. Badreddine","doi":"10.2478/sgem-2022-0009","DOIUrl":"https://doi.org/10.2478/sgem-2022-0009","url":null,"abstract":"Abstract The Youd etal liquefaction resistance curves developed in 2001 to characterize the cyclic resistance of soil based on SPT test are the most used in the context of the Seed and Idriss simplified procedure as a deterministic model. These curves were developed from a modified database of Seed etal. in 1985 with the assumption that the actual peak shear stress (τd) induced at depth h is always less than that predicted by the simplified procedure (τr) of Seed and Idriss (rd= τd/τr<1). By using a suite of equivalent linear site response analyses to adjust the dynamic and the simplified shear stress at depth h, Filali and Sbartai showed in 2017 that the dynamic peak shear stress for some earthquakes is greater than the simplified peak shear stress (rd>1). As in this case, the assumption of the simplified procedure is not verified, Filali and Sbartai have proposed a corrector factor (RC) in the range where rd>1 to adjust the deformable and rigid body. In this paper, we will present a probabilistic study for the evaluation of the liquefaction potential using a database based on SPT measurement compiled after the Chi-Chi Taiwan earthquake, in which the cyclic stress ratio is evaluated using the proposed corrector factor. The objective of this study is to present a probabilistic shape of the cyclic resistance ratio (CRR) curves based on the original simplified method of Seed and Idriss and the corrected version and a new formulation for computing the probability of liquefaction.","PeriodicalId":44626,"journal":{"name":"Studia Geotechnica et Mechanica","volume":"44 1","pages":"162 - 174"},"PeriodicalIF":0.6,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44696032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Numerical Evaluation of Partially Strengthened Floating Granular Pile Raft With Vertical and Radial Displacement Compatibility 部分加固浮粒桩筏竖向与径向位移协调的数值评价
IF 0.6
Studia Geotechnica et Mechanica Pub Date : 2022-05-28 DOI: 10.2478/sgem-2022-0008
Raksha Rani Sanadhya, J. Sharma, Ashish Solanki
{"title":"Numerical Evaluation of Partially Strengthened Floating Granular Pile Raft With Vertical and Radial Displacement Compatibility","authors":"Raksha Rani Sanadhya, J. Sharma, Ashish Solanki","doi":"10.2478/sgem-2022-0008","DOIUrl":"https://doi.org/10.2478/sgem-2022-0008","url":null,"abstract":"Abstract In today’s time, construction is the main key for development of any nation, but land resources are getting deplete. Thus, construction on compressible soil is left as a choice. Stone columns or granular piles (GPs) are broadly used to advance the bearing capacity of crummy ground and lessen the displacement of constructionserected on them. GP is the most efficient and cheap for ground improvement. Analysis of single partially strengthened (SPS) floating granular piled raft is presented in this paper in terms of several normalized aspects like vertical and radial displacement impact factors, settlement impact factor (SIF) for any depth, the normalized GP–soil interface shear and radial stresses, the load ratio, i.e., the percentage of the load taken by the GP and raft to the total load, and the normalized contact pressure distribution below the raft, which are evaluated for SPS floating granular piled raft. The SIF for top of GP is noticed to decline with the surge in the values of the strengthening parameters. The interfacial shear stresses get reorganized along the length of the GP.","PeriodicalId":44626,"journal":{"name":"Studia Geotechnica et Mechanica","volume":"44 1","pages":"148 - 161"},"PeriodicalIF":0.6,"publicationDate":"2022-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44091635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Excavations in the vicinity of the antiflood embankments – calculating issues 防汛堤防附近的开挖计算问题
IF 0.6
Studia Geotechnica et Mechanica Pub Date : 2022-04-26 DOI: 10.2478/sgem-2022-0006
M. Grodecki
{"title":"Excavations in the vicinity of the antiflood embankments – calculating issues","authors":"M. Grodecki","doi":"10.2478/sgem-2022-0006","DOIUrl":"https://doi.org/10.2478/sgem-2022-0006","url":null,"abstract":"Abstract According to Polish law, it is prohibited to perform excavations or locate buildings closer than 50 m from the embankment. In order to obtain exemption from this ban, filtration and stability analysis of the embankment and excavation in the flood conditions have to be performed. This paper presents results of the numerical investigations on interactions between excavations and embankment. Complex nature of the problem is presented. Methodology of numerical simulations and real case examples are described.","PeriodicalId":44626,"journal":{"name":"Studia Geotechnica et Mechanica","volume":"60 47","pages":"138 - 147"},"PeriodicalIF":0.6,"publicationDate":"2022-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41246453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Nonlinear buckling analysis of network arch bridges 网状拱桥非线性屈曲分析
IF 0.6
Studia Geotechnica et Mechanica Pub Date : 2022-04-26 DOI: 10.2478/sgem-2022-0007
Adrian Błonka, Łukasz Skrętkowicz
{"title":"Nonlinear buckling analysis of network arch bridges","authors":"Adrian Błonka, Łukasz Skrętkowicz","doi":"10.2478/sgem-2022-0007","DOIUrl":"https://doi.org/10.2478/sgem-2022-0007","url":null,"abstract":"Abstract The paper presents designing due to the instability in-plane problem of the net-arch bridge. Firstly, three essential nonlinear examples are benchmarked in a finite element software. Secondly, linear and nonlinear buckling analyses are conducted, with the purpose of investigating the impact of nonlinear behavior of cables on steel arch instability, involving a comparison of the critical load factor and form from both the linear buckling and the post-critical third-order theory analyses. The impact of prestress and tension, elevation, and hanger failure on instability is discussed. Moreover, a new method for determining nonlinear buckling form for the net-arch structure is proposed in order to allow implementation of Unique Global and Local Imperfection method in cable structures. Calculations are conducted in the finite element software. The model of the network arch bridge is based on the bridge over Vistula River in Cracow.","PeriodicalId":44626,"journal":{"name":"Studia Geotechnica et Mechanica","volume":"44 1","pages":"123 - 137"},"PeriodicalIF":0.6,"publicationDate":"2022-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48032044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Upper Bounds for the Complex Growth Rate of a Disturbance in Ferrothermohaline Convection 铁热盐对流扰动复增长率的上界
IF 0.6
Studia Geotechnica et Mechanica Pub Date : 2022-03-10 DOI: 10.2478/sgem-2022-0005
K. Ram, J. Prakash, K. Kumari, Pankaj Kumar
{"title":"Upper Bounds for the Complex Growth Rate of a Disturbance in Ferrothermohaline Convection","authors":"K. Ram, J. Prakash, K. Kumari, Pankaj Kumar","doi":"10.2478/sgem-2022-0005","DOIUrl":"https://doi.org/10.2478/sgem-2022-0005","url":null,"abstract":"Abstract It is proved analytically that the complex growth rate σ= σr+iσi (σr and σi are the real and imaginary parts of σ, respectively) of an arbitrary oscillatory motion of neutral or growing amplitude in ferrothermohaline convection in a ferrofluid layer for the case of free boundaries is located inside a semicircle in the right half of the σrσi-plane, whose center is at the origin and radius = Rs[1−M1′(1−1M5)]Pr′, {rm{radius}}, = ,sqrt {{{{R_s}left[{1 - M_1^{'}left({1 - {1 over {{M_5}}}} right)} right]} over {P_r^{'}}}}, where Rs is the concentration Rayleigh number, Pr′ is the solutal Prandtl number, M1′ is the ratio of magnetic flux due to concentration fluctuation to the gravitational force, and M5 is the ratio of concentration effect on magnetic field to pyromagnetic coefficient. Further, bounds for the case of rigid boundaries are also derived separately.","PeriodicalId":44626,"journal":{"name":"Studia Geotechnica et Mechanica","volume":"44 1","pages":"114 - 122"},"PeriodicalIF":0.6,"publicationDate":"2022-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47425271","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Influence of Permanent Deflections on The Vibrations of Bridge Spans in Operating Conditions 运行状态下永久挠度对桥梁桥梁振动的影响
IF 0.6
Studia Geotechnica et Mechanica Pub Date : 2022-03-02 DOI: 10.2478/sgem-2022-0004
M. Kużawa, A. Mróz, J. Bień
{"title":"Influence of Permanent Deflections on The Vibrations of Bridge Spans in Operating Conditions","authors":"M. Kużawa, A. Mróz, J. Bień","doi":"10.2478/sgem-2022-0004","DOIUrl":"https://doi.org/10.2478/sgem-2022-0004","url":null,"abstract":"Abstract The paper presents the method and results of numerical simulations of the mutual dynamic interactions between vehicles and the bridge structure, which has defect in the form of excessive permanent deformations. The parametric analyses were carried out taking into account the following parameters: permanent deflections of spans, with a maximum value ranging from 0 to 150 mm, vehicle speed from 10 m/s (36 km/h) to 30 m/s (108 km/h), and two types of heavy vehicle suspension systems, each with very different properties. The presented analyses are based on the characteristics of real motorway bridge structure with permanent deflections of the multi-span main girders, constructed of steel beams and reinforced concrete slab. The proposed procedure of dynamic numerical analysis can also be useful in the assessment of the influence of permanent deflections on the interactions between vehicles and other types of bridge structures.","PeriodicalId":44626,"journal":{"name":"Studia Geotechnica et Mechanica","volume":"44 1","pages":"97 - 113"},"PeriodicalIF":0.6,"publicationDate":"2022-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49247001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Modern methods for monitoring water leakages in water networks 监测水网漏水的现代方法
IF 0.6
Studia Geotechnica et Mechanica Pub Date : 2022-03-01 DOI: 10.2478/sgem-2022-0001
M. Kwietniewski, P. Świercz, J. Chudzicki
{"title":"Modern methods for monitoring water leakages in water networks","authors":"M. Kwietniewski, P. Świercz, J. Chudzicki","doi":"10.2478/sgem-2022-0001","DOIUrl":"https://doi.org/10.2478/sgem-2022-0001","url":null,"abstract":"Abstract The main idea of this article is to adopt the thesis that the main and, at the same time, the most effective (apart from proper maintenance and operation) element of the strategy of limiting water losses in water supply networks is continuous integrated monitoring of the network using the latest achievements of IT technologies, including GIS (Geographical Information System), GPS (Global Positioning System), GSM (The Global System for Mobile Communications) and software based on a cloud platform. Considering the above, the paper highlights the problem of leakages against the background of water deficit in the world and proposes a classification of methods for detecting and estimating the size of leakages. On the basis of available literature sources, selected modern and, in the authors’ opinion, most interesting water loss monitoring systems enabling leak detection and estimation of the amount of wasted water are presented. Then, these methods are analysed, pointing to their strengths and weaknesses in terms of leak detection efficiency.","PeriodicalId":44626,"journal":{"name":"Studia Geotechnica et Mechanica","volume":"44 1","pages":"53 - 65"},"PeriodicalIF":0.6,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46731442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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