{"title":"CALIBRATION OF NON-LINEAR TO LINEAR SOIL MODULUS ON PILE FOUNDATION DUE TO LATERAL LOADING","authors":"Sumiyati Gunawan","doi":"10.21660/2023.111.4044","DOIUrl":"https://doi.org/10.21660/2023.111.4044","url":null,"abstract":"","PeriodicalId":47135,"journal":{"name":"International Journal of GEOMATE","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135273500","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}
{"title":"LIFE CYCLE ASSESSMENT IN THE PRODUCTION PROCESS OF CRUDE PALM OIL (CPO) ON PALM OIL PLANTATION AND MILLS","authors":"Deffi Ayu Puspito Sari","doi":"10.21660/2023.111.s8616","DOIUrl":"https://doi.org/10.21660/2023.111.s8616","url":null,"abstract":"","PeriodicalId":47135,"journal":{"name":"International Journal of GEOMATE","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135273506","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}
{"title":"THE IMPACTS OF MT. SEMERU VOLCANIC ASH ON THE NEARBY AGRICULTURAL LAND FERTILITY: A CASE STUDY OF APPLICATION OF BORE-HOLE AND GEOELECTRIC METHODS","authors":"Alamsyah M. Juwono","doi":"10.21660/2023.111.3953","DOIUrl":"https://doi.org/10.21660/2023.111.3953","url":null,"abstract":"","PeriodicalId":47135,"journal":{"name":"International Journal of GEOMATE","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135321443","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}
{"title":"SIMPLIFIED METHOD OF CALCULATING A BEAM ON A TWO-PARAMETER ELASTIC FOUNDATION","authors":"Sungat Akhazhanov","doi":"10.21660/2023.111.3898","DOIUrl":"https://doi.org/10.21660/2023.111.3898","url":null,"abstract":"","PeriodicalId":47135,"journal":{"name":"International Journal of GEOMATE","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135321465","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}
: This paper proposes a novel method for analyzing steel frames with semi-rigid connections and displacement constraints, using a condensed finite element formulation. The paper outlines a systematic approach for constructing the condensed stiffness matrix and the condensed force vector. The proposed analysis can predict accurately the nonlinear effects of connections on the behavior and strength of semi-rigid steel frames. Kishi-Chen power model is applied to describe the nonlinear behavior of semi-rigid connections. The proposed method's effectiveness is demonstrated through analytical and numerical analysis of a semi-rigid steel frame structure, highlighting the procedure's simplicity and robustness. To verify the validity and applicability of the proposed method, several examples of realistic structures and benchmark cases are provided. The strengths predicted by the proposed method demonstrate good agreement with the available experimental results.
{"title":"ANALYSIS OF STEEL FRAME WITH SEMI-RIGID CONNECTIONS AND CONSTRAINTS USING A CONDENSED FINITE ELEMENT FORMULATION","authors":"Tien Dung Nguyen","doi":"10.21660/2023.111.4022","DOIUrl":"https://doi.org/10.21660/2023.111.4022","url":null,"abstract":": This paper proposes a novel method for analyzing steel frames with semi-rigid connections and displacement constraints, using a condensed finite element formulation. The paper outlines a systematic approach for constructing the condensed stiffness matrix and the condensed force vector. The proposed analysis can predict accurately the nonlinear effects of connections on the behavior and strength of semi-rigid steel frames. Kishi-Chen power model is applied to describe the nonlinear behavior of semi-rigid connections. The proposed method's effectiveness is demonstrated through analytical and numerical analysis of a semi-rigid steel frame structure, highlighting the procedure's simplicity and robustness. To verify the validity and applicability of the proposed method, several examples of realistic structures and benchmark cases are provided. The strengths predicted by the proposed method demonstrate good agreement with the available experimental results.","PeriodicalId":47135,"journal":{"name":"International Journal of GEOMATE","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135273346","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}
{"title":"DISPOSAL OF WASTE GENERATED DURING THE OPERATION OF TREATMENT FACILITIES","authors":"Vladislava Volkova","doi":"10.21660/2023.111.3955","DOIUrl":"https://doi.org/10.21660/2023.111.3955","url":null,"abstract":"","PeriodicalId":47135,"journal":{"name":"International Journal of GEOMATE","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135321107","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}
: The Screw Driving Sounding (SDS) test is an improvised and modified version of the Swedish Weight sounding (SWS) test. It is an emerging technique for in-situ field characterization used to estimate strength parameters from field tests directly, rather than by obtaining samples from the field and performing laboratory tests. For this research, several boreholes with standard penetration tests (SPTs) were conducted in the central region of Bangkok. SDS tests and field vane shear tests were performed in the vicinity of these boreholes. The undrained shear strengths from these tests were correlated separately to the SDS torque for marine and intertidal clay deposits. These equations differed slightly due to the difference in the shearing during failure of soil. These empirical equations are supported by an analytical equation that is derived based on the shearing mechanism of soil when the SDS screw head is penetrated into the soil. The correlation to estimate the SPT N was developed for stiff and hard alluvium clay, and compared with the equation from past research. Plots of SDS penetration energy with the consistency index showed that the clays could be clustered as two distinct groups based on their state and consistency. The SDS penetration resistance parameters were extremely affected by differences in the state of clay, which depended on the soil’s depositional history and depositional environment. The past researches were mainly empirical and dealt with sand or Japanese clay, formed in different depositional environment. Those equations do not give reliable results when applied directly to Bangkok clay. Hence, from this research, the undrained shear strength of soft clay and SPT N of stiff clay of the Bangkok deposit can be estimated directly from the equations.
{"title":"SOIL STRENGTH ESTIMATION USING SCREW DRIVING SOUNDING TECHNIQUE FOR BANGKOK CLAY LAYERS","authors":"Suttisak Soralump","doi":"10.21660/2023.111.3368","DOIUrl":"https://doi.org/10.21660/2023.111.3368","url":null,"abstract":": The Screw Driving Sounding (SDS) test is an improvised and modified version of the Swedish Weight sounding (SWS) test. It is an emerging technique for in-situ field characterization used to estimate strength parameters from field tests directly, rather than by obtaining samples from the field and performing laboratory tests. For this research, several boreholes with standard penetration tests (SPTs) were conducted in the central region of Bangkok. SDS tests and field vane shear tests were performed in the vicinity of these boreholes. The undrained shear strengths from these tests were correlated separately to the SDS torque for marine and intertidal clay deposits. These equations differed slightly due to the difference in the shearing during failure of soil. These empirical equations are supported by an analytical equation that is derived based on the shearing mechanism of soil when the SDS screw head is penetrated into the soil. The correlation to estimate the SPT N was developed for stiff and hard alluvium clay, and compared with the equation from past research. Plots of SDS penetration energy with the consistency index showed that the clays could be clustered as two distinct groups based on their state and consistency. The SDS penetration resistance parameters were extremely affected by differences in the state of clay, which depended on the soil’s depositional history and depositional environment. The past researches were mainly empirical and dealt with sand or Japanese clay, formed in different depositional environment. Those equations do not give reliable results when applied directly to Bangkok clay. Hence, from this research, the undrained shear strength of soft clay and SPT N of stiff clay of the Bangkok deposit can be estimated directly from the equations.","PeriodicalId":47135,"journal":{"name":"International Journal of GEOMATE","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135273511","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}
{"title":"EDGE DETECTION TECHNIQUE FOR SIMULTANEOUS MEASUREMENT OF TOTAL SUSPENDED SOLIDS AND TURBIDITY","authors":"Rijal Hakiki","doi":"10.21660/2023.111.4003","DOIUrl":"https://doi.org/10.21660/2023.111.4003","url":null,"abstract":"","PeriodicalId":47135,"journal":{"name":"International Journal of GEOMATE","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135320397","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}
: Coir waste randomly mixed into soil is an alternative material for strengthening expansive clay. However, these materials cannot reduce swelling due to water, requiring chemical stabilization. This study combined coir fibers with a mixture of coir-wood ash, the waste from the tofu home industry. No studies have utilized such a combination of structural materials. This study aims to examine the soaked and unsoaked California Bearing Ratio (CBR), swelling, unconfined compressive strength (UCS), and tensile strength of soil mixed with 0.75% fibers, and ash with varying content: 0%, 2%, 4%, 6%, 8%, and 10% of the mixture’s total weight. The curing time was seven days, 14 days, and 28 days. Testing refers to ASTM. The test results unveiled that the unsoaked CBR, soaked CBR, UCS, and tensile strength increased with rising ash content and curing time. A 6%–8% ash content produced the highest CBR, UCS, and tensile strength. On the other hand, by including a 6%–10% ash content, the swelling was decreased to 0%. Combining coir fiber and coir-wood ash has proven very effective for stabilizing expansive clays. In comparison to soils merely reinforced with fiber, the addition of coir-wood ash can eliminate swelling and increase the value of soaked CBR, UCS, tensile strength, and secant modulus up to 534%, 349%, 105%, and 824 %, respectively.
{"title":"COMBINATION OF COIR FIBER WASTE AND COIR-WOOD ASH FOR EXPANSIVE CLAY STABILIZATION","authors":"Anita Widianti","doi":"10.21660/2023.111.3976","DOIUrl":"https://doi.org/10.21660/2023.111.3976","url":null,"abstract":": Coir waste randomly mixed into soil is an alternative material for strengthening expansive clay. However, these materials cannot reduce swelling due to water, requiring chemical stabilization. This study combined coir fibers with a mixture of coir-wood ash, the waste from the tofu home industry. No studies have utilized such a combination of structural materials. This study aims to examine the soaked and unsoaked California Bearing Ratio (CBR), swelling, unconfined compressive strength (UCS), and tensile strength of soil mixed with 0.75% fibers, and ash with varying content: 0%, 2%, 4%, 6%, 8%, and 10% of the mixture’s total weight. The curing time was seven days, 14 days, and 28 days. Testing refers to ASTM. The test results unveiled that the unsoaked CBR, soaked CBR, UCS, and tensile strength increased with rising ash content and curing time. A 6%–8% ash content produced the highest CBR, UCS, and tensile strength. On the other hand, by including a 6%–10% ash content, the swelling was decreased to 0%. Combining coir fiber and coir-wood ash has proven very effective for stabilizing expansive clays. In comparison to soils merely reinforced with fiber, the addition of coir-wood ash can eliminate swelling and increase the value of soaked CBR, UCS, tensile strength, and secant modulus up to 534%, 349%, 105%, and 824 %, respectively.","PeriodicalId":47135,"journal":{"name":"International Journal of GEOMATE","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135273512","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}
{"title":"PROPOSED FORMULATION FOR PREDICTING DEFLECTIONS OF CFRP-RC BEAMS","authors":"Zaiimatul Ummah","doi":"10.21660/2023.111.4050","DOIUrl":"https://doi.org/10.21660/2023.111.4050","url":null,"abstract":"","PeriodicalId":47135,"journal":{"name":"International Journal of GEOMATE","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135273517","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}
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