Proceedings of the 10th International Conference on Fracture Mechanics of Concrete and Concrete Structures最新文献

{"title":"Strut efficiency factors in design of reinforced concrete deep beams","authors":"R. Kondalraj","doi":"10.21012/FC10.235531","DOIUrl":"https://doi.org/10.21012/FC10.235531","url":null,"abstract":"","PeriodicalId":329531,"journal":{"name":"Proceedings of the 10th International Conference on Fracture Mechanics of Concrete and Concrete Structures","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130065702","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":"Damage-to-fracture transition through an Eikonal Non-Local (ENL) continuum damage formulation with embedded strong discontinuities","authors":"Flavien Thierry, G. Rastiello, C. Giry, F. Gatuingt","doi":"10.21012/FC10.233386","DOIUrl":"https://doi.org/10.21012/FC10.233386","url":null,"abstract":"The Eikonal Non-Local damage model (ENL) is an integral-based regularization method with damage-dependent non-local interactions. This contribution introduces the transition from an ENL formulation to a strong discontinuity model in a one-dimensional case. By introducing the formation of a cohesive crack in highly damaged areas, this new formulation seeks to solve problems of objectivity of results with respect to the mesh size for regularization methods with evolution of non-local interactions leading to strain localization.","PeriodicalId":329531,"journal":{"name":"Proceedings of the 10th International Conference on Fracture Mechanics of Concrete and Concrete Structures","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121905711","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":"Dynamic fracture of concrete in compression: 3D FE analysis at macro and meso scale","authors":"S. Gambarelli","doi":"10.21012/FC10.234154","DOIUrl":"https://doi.org/10.21012/FC10.234154","url":null,"abstract":"","PeriodicalId":329531,"journal":{"name":"Proceedings of the 10th International Conference on Fracture Mechanics of Concrete and Concrete Structures","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121170578","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":"A rate dependent eigenerosion plasticity model for concrete","authors":"A. Qinami","doi":"10.21012/FC10.234109","DOIUrl":"https://doi.org/10.21012/FC10.234109","url":null,"abstract":"","PeriodicalId":329531,"journal":{"name":"Proceedings of the 10th International Conference on Fracture Mechanics of Concrete and Concrete Structures","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122369521","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":"Uncertainty propagation through Thermo-Hydro-Mechanical modelling of concrete cracking and leakage – Application to containment buildings","authors":"J. Baroth","doi":"10.21012/FC10.235507","DOIUrl":"https://doi.org/10.21012/FC10.235507","url":null,"abstract":"The prediction of the Thermo-Hydro-Mechanical (THM) behavior of large buildings with a containment role (reservoirs, dams, nuclear vessels, etc.) is a critical step towards their risk assessment. In particular, their cracking implies a considerable loss of their structural tightness that needs to be controlled, monitored and, if necessary, repaired to ensure a safe operational environment. The difficulty of performing numerical predictive analyses is related to (a) the multiphasic and multi-physical nature of concrete (b) the large number of inputs to identify at the specimen and structural scales (c) the non-negligible and intrinsic material and load related uncertainties. All these aspects strongly affect our ability to foresee the structural response of large constructions; especially in terms of cracking and tightness. In this contribution, a global finite elements based stochastic methodology is proposed to allow physically representative and efficient non-intrusive probabilistic coupling of strongly nonlinear and numerically expensive THM calculations. To this aim (a) concrete cracking is modeled using a stochastic, local and energy regularized damage model accounting for size effects (b) concrete permeability is defined using a strain-based law (c) the spatial heterogeneity of properties is modeled using discretized and FE projected Random Fields (d) uncertainties propagation is computed using adapted Surface Response based methods. For the demonstration of this strategy’s efficiency and effectiveness, in terms of physical accuracy and cost optimization, a 1:3 scaled containment building named VeRCoRs is considered as an application. In particular, a complete probabilistic analysis of its dry air leakage rate (indicative of the whole structural performance) is achieved within a computational time of tens of days only. In general, such results can help during the decision-making process for the design, maintenance and risk assessment of large structures with a containment role based on a leakagerate-defined criterion under service loads. 1 Institute of Engineering Univ. Grenoble Alpes 10th International Conference on Fracture Mechanics of Concrete and Concrete Structures FraMCoS-X G. Pijaudier-Cabot, P. Grassl and C. La Borderie (Eds)","PeriodicalId":329531,"journal":{"name":"Proceedings of the 10th International Conference on Fracture Mechanics of Concrete and Concrete Structures","volume":"107 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132770755","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":"Strain development of high strength grouts under compressive fatigue loading and determination of fatigue properties from self-heating measurements","authors":"E. Myrtja","doi":"10.21012/FC10.235506","DOIUrl":"https://doi.org/10.21012/FC10.235506","url":null,"abstract":"Fatigue behaviour in concrete and grout has become a very important mechanical behaviour to be studied further due to more sleek structures requiring higher performances and strength, such as onshore and offshore wind turbines. However, relatively few studies are available about fatigue behaviour and often contradictory. A series of monotonic and fatigue tests were performed to investigate the fatigue behaviour of ultrahigh strength grout under compression. Multiple stress levels were tested at two loading frequencies, 10Hz and 1Hz. The developments of strain and stiffness degradation were analysed for each test and show a typical three-step damage mechanism. At a higher frequency, some heating is observed within the specimen and the observations are made with thermocouples and infrared thermography. Since the fatigue testing is very time consuming, mostly when defining the S-N curve and endurance limit, an alternative method such as the selfheating method was used. This method is widely applied in materials such as steel [1], aluminium, composite materials or rubber-like materials, to define the endurance limit with only a few specimens based on the heating released during fatigue testing. To the authors knowledge, it has never been used in grout materials. Our experimental work on numerous specimens shows that the self-heating method might be an alternative method in order to predict the endurance limit for concrete and grouts. Erisa Myrtja, Olivier Rateau, Jerome Soudier, Evelyne Prat and Mohend Chaouche","PeriodicalId":329531,"journal":{"name":"Proceedings of the 10th International Conference on Fracture Mechanics of Concrete and Concrete Structures","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133526973","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":"Performance Characteristics of Cement Grout in Precast Construction","authors":"Appa Rao, G. A. K. Manikandan","doi":"10.21012/FC10.233507","DOIUrl":"https://doi.org/10.21012/FC10.233507","url":null,"abstract":"Investigations on mechanical, elastic and performance of cement grout at different ages have been reported. The compressive strength of cement grout at the ages of 1 day, 3, 7, 28 and 90 days has been observed to be 40.10, 53.90, 60.30, 75.20 and 76.02 MPa respectively, while the corresponding flexural and direct tensile strengths are 6.1, 9.3, 9.6, 12.2, and 12.4 MPa, and 2.2, 3.15, 4.34, 6.02 and 6.49 MPa. The strength development in cement grout within 3 days has been observed to be excellent, while the strength development in 7 days is impressive. The strength development is normal up to 28 days and very negligible after 28 days. The direct shear strength of cement grout at 28 days is 3.6MPa. The bond strength of cement grout at 7 and 28 days have been observed to be 25.30 and 35.66 MPa respectively. The dynamic modulus of elasticity, quality and durability of cement grout have been found to be very well acceptable. Water absorption of cement grout is just 2.70%, which is well below limits. The anchorage bond strength of cement grout to be used for precast system has been observed to be extremely good in structures subjected to fatigue loading. The cement grout seems to be an excellent bonding material for various repair and precast concrete applications.","PeriodicalId":329531,"journal":{"name":"Proceedings of the 10th International Conference on Fracture Mechanics of Concrete and Concrete Structures","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116994277","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":"Nonlinear behavior assessment of reinforced concrete frames by carbon fiber reinforced polymers under blast loading using finite element method","authors":"M. Kolbadi","doi":"10.21012/FC10.233505","DOIUrl":"https://doi.org/10.21012/FC10.233505","url":null,"abstract":"","PeriodicalId":329531,"journal":{"name":"Proceedings of the 10th International Conference on Fracture Mechanics of Concrete and Concrete Structures","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117034224","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":"Fracture mechanics based design of reinforced concrete beams-An analytical study","authors":"F. Rama","doi":"10.21012/FC10.244962","DOIUrl":"https://doi.org/10.21012/FC10.244962","url":null,"abstract":"","PeriodicalId":329531,"journal":{"name":"Proceedings of the 10th International Conference on Fracture Mechanics of Concrete and Concrete Structures","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132243266","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":"Complex evaluation of the mechanical and fracture properties of cementitious materials with different water-cement ratio","authors":"B. Kucharczyková","doi":"10.21012/FC10.233083","DOIUrl":"https://doi.org/10.21012/FC10.233083","url":null,"abstract":"This paper is aimed at the development of the physical, mechanical and fracture characteristics of cementitious materials during ageing. Three mortars which differed only in the water-cement ratio (w/c) were prepared for manufacturing of the test specimens intended for the experiments. All mortars were prepared using the standardized quartzite sand with the particle grain size distribution of 0−2 mm CEN 196-1, CEM I 42.5 R Portland cement (cement plant Mokrá, Czech Republic) and water. The reference w/c was set to the value of 0.5. To produce two other mortars, this ratio was reduced by approx. 5 and 30 %. This resulted in w/c ratio 0.47 and 0.35 respectively. All test specimens were not protected intentionally from drying during the whole time of measurement and were stored in laboratory at ambient temperature of 21 ± 2 °C and relative humidity of 60 ± 10 %. The results of the shrinkage, elastic, fracture and strength parameters determined within the time interval from 3 days to 2 years of ageing are summarized and discussed in the paper. The results of performed experiments were partially published within the conference DYN-WIND’17. This paper focuses especially on the evaluation of the results obtained after 2 years of specimens ageing and also provides a complex discussion of the results gathered during the whole time of ageing. The results show a crucial impact of the w/c on the final values of mechanical and fracture characteristics. The early-age and long-term characteristics were substantially influenced by the poor curing conditions.","PeriodicalId":329531,"journal":{"name":"Proceedings of the 10th International Conference on Fracture Mechanics of Concrete and Concrete Structures","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134351452","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}