The proceedings of the 13th international conference "Modern Building Materials, Structures and Techniques" (MBMST 2019)最新文献_第10页

An application of BIM technologies in typical dwelling building projects BIM技术在典型住宅建筑项目中的应用

The proceedings of the 13th international conference "Modern Building Materials, Structures and Techniques" (MBMST 2019) Pub Date : 2019-12-03 DOI: 10.3846/mbmst.2019.064

D. Migilinskas, Juozas Katkus, Mykolas Sadauskas

{"title":"An application of BIM technologies in typical dwelling building projects","authors":"D. Migilinskas, Juozas Katkus, Mykolas Sadauskas","doi":"10.3846/mbmst.2019.064","DOIUrl":"https://doi.org/10.3846/mbmst.2019.064","url":null,"abstract":"The modern technologies are widely implemented in construction market including building information\u0000modeling (BIM) whitch is rapidly developing in many management segments related to design, construction, and building operation. BIM technologies are being used more and more by architects, engineers, surveyors, builders, contractors,\u0000subcontractors, construction manufacturers and building administrators who need to work together to simplify workflow\u0000and ensure that all design, construction and building operations are effective. BIM is already in use in Lithuania, but\u0000many construction market participants and mostly the customer still think that BIM is too expensive for Lithuanian\u0000construction market. The aim of this study is to analyze the benefits, opportunities, limitations, chalanges and obticles\u0000of using the BIM methodology for typical dwelling building projects. The results of resreach are based on detail payback\u0000assessment of BIM methodology use in small-scale projects and small business companies is delivered in the conclusions","PeriodicalId":169478,"journal":{"name":"The proceedings of the 13th international conference \"Modern Building Materials, Structures and Techniques\" (MBMST 2019)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128253835","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

Moment redistribution in continuous prestressed concrete box girder with corrugated steel webs 波纹钢腹板连续预应力混凝土箱梁弯矩重分布研究

The proceedings of the 13th international conference "Modern Building Materials, Structures and Techniques" (MBMST 2019) Pub Date : 2019-12-03 DOI: 10.3846/mbmst.2019.159

J. Du, Pui-Lam Ng, Xiang Ma, Jian Wang

{"title":"Moment redistribution in continuous prestressed concrete box girder with corrugated steel webs","authors":"J. Du, Pui-Lam Ng, Xiang Ma, Jian Wang","doi":"10.3846/mbmst.2019.159","DOIUrl":"https://doi.org/10.3846/mbmst.2019.159","url":null,"abstract":"A fibre-finite-element model of continuous prestressed concrete (PC) composite box girder with corrugated steel webs is established with force-based elements using OpenSees. After the model is validated with existing experimental data, the effects of reinforcement index in upper and lower flanges, effective prestress and concrete strength on the moment redistribution behaviour is analysed. It is shown that increasing the reinforcement index in lower flange or effective prestress can increase the amount of bending moment redistribution, whereas increasing the concrete strength or reinforcement index in upper flange can decrease the amount of bending moment redistribution. By inspecting the sensitivity of parameters, it is found that the reinforcement index in lower flange has the most significant influence on the moment redistribution, followed by the concrete strength and then by the effective prestress, while the reinforcement index in upper flange has only little impact on the moment redistribution. The calculation results are compared with the existing formulas. Finally, a moment redistribution formula is proposed for continuous PC box girder with corrugated steel webs.","PeriodicalId":169478,"journal":{"name":"The proceedings of the 13th international conference \"Modern Building Materials, Structures and Techniques\" (MBMST 2019)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115603195","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

The method of scheduling construction projects increasing the use of resources of the general contractor 施工项目调度方法提高了总承包商的资源利用率

The proceedings of the 13th international conference "Modern Building Materials, Structures and Techniques" (MBMST 2019) Pub Date : 2019-12-03 DOI: 10.3846/mbmst.2019.019

M. Tomczak, P. Jaśkowski

{"title":"The method of scheduling construction projects increasing the use of resources of the general contractor","authors":"M. Tomczak, P. Jaśkowski","doi":"10.3846/mbmst.2019.019","DOIUrl":"https://doi.org/10.3846/mbmst.2019.019","url":null,"abstract":"In carrying out construction projects, enterprises strive to obtain the highest degree of harmonization of the\u0000work of the resources involved. It is manifested in ensuring continuous and regular production with a full usage of\u0000their executive potential. The purpose of harmonization is to eliminate unjustified interruptions in the work of resources. When planning the realization of non-repetitive construction projects, one should use methods of scheduling\u0000that allow the analysis of the project model not only as a function of time. It is also important to take into account the\u0000effectiveness of using your own resources and limitations in their availability. The article analyzes the problem of\u0000harmonizing the work of crews of the general contractor, performing non-rhythmic, non-cyclical and inhomogeneous\u0000processes under the assumption of deterministic operating conditions. An important issue from the point of view of\u0000reducing the costs of crews’ employment is the continuity of their work. A mathematical model was developed concerning the problem of minimization of downtime in the work of the general contractor crews with a directively fixed\u0000time and limit of the project realization cost, taking into account the limitations in the availability of crews and the\u0000possibility to outsource works to subcontractors. The possibility of subcontracting works does not allow for a clear indication in the project model sequences of processes carried out by crews and the usage of previously developed\u0000scheduling methods. The method of solving the model (in a linear form with continuous and binary variables) is presented in the example. Additionally, the proposed method allows analyzing the impact of the amount of downtime at\u0000work on the duration of the project and the impact of the work outsourced to subcontractors on the continuity of the\u0000general contractor’s work.","PeriodicalId":169478,"journal":{"name":"The proceedings of the 13th international conference \"Modern Building Materials, Structures and Techniques\" (MBMST 2019)","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121045195","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: 4

Fire barrier based on expanded perlite composites 基于膨胀珍珠岩复合材料的防火屏障

The proceedings of the 13th international conference "Modern Building Materials, Structures and Techniques" (MBMST 2019) Pub Date : 2019-12-03 DOI: 10.3846/mbmst.2019.047

R. Kusiorowski, J. Witek, I. Majchrowicz, Andrzej Kleta, A. Jirsa-Ociepa

{"title":"Fire barrier based on expanded perlite composites","authors":"R. Kusiorowski, J. Witek, I. Majchrowicz, Andrzej Kleta, A. Jirsa-Ociepa","doi":"10.3846/mbmst.2019.047","DOIUrl":"https://doi.org/10.3846/mbmst.2019.047","url":null,"abstract":"Decreased strength of building materials as a result of flame impingement (e.g. during a fire) is one of major\u0000threats in the construction branch. For these reasons, the effectiveness of fire safety systems in various kinds of facilities\u0000or structures is extremely important. One of the determinants of this effectiveness is so-called fire insulation, i.e. time\u0000expressed in minutes after which an increase in the temperature of a protected structure or facility exceeds a certain\u0000admissible value (140 °C). The results of investigations presented in the article concern the determination of the effect\u0000of various mineral binders used in the manufacture of insulation boards from expanded perlite on fire resistance and, in\u0000consequence, on extending the time of fire insulation in the conditions of cellulose and hydrocarbon fire. The conducted\u0000research has revealed that the fire resistance of perlite products can be modelled by selecting adequate mineral binders,\u0000with respect to specific applications and economic considerations. Insulation boards based on expanded perlite – depending on the binder used – were characterized by a fire insulation ranging (with a board thickness of 50 mm) from 50\u0000to 100 minutes in the conditions of cellulose fire and from 20 to 30 minutes in the conditions of hydrocarbon fire.","PeriodicalId":169478,"journal":{"name":"The proceedings of the 13th international conference \"Modern Building Materials, Structures and Techniques\" (MBMST 2019)","volume":"277 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124461192","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

Degree of MWCNT suspension dispersity and its influence on rheology of cement pastes MWCNT悬浮分散度及其对水泥浆体流变性的影响

The proceedings of the 13th international conference "Modern Building Materials, Structures and Techniques" (MBMST 2019) Pub Date : 2019-12-03 DOI: 10.3846/mbmst.2019.022

G. Skripkiūnas, E. Karpova, J. Bendoraitiene, I. Barauskas, R. Drochytka

{"title":"Degree of MWCNT suspension dispersity and its influence on rheology of cement pastes","authors":"G. Skripkiūnas, E. Karpova, J. Bendoraitiene, I. Barauskas, R. Drochytka","doi":"10.3846/mbmst.2019.022","DOIUrl":"https://doi.org/10.3846/mbmst.2019.022","url":null,"abstract":"Modification of cement pastes by MWCNT (multi-walled carbon nanotubes) suspension enables to manage\u0000by their rheological properties due to the nanometer size of MWCNT. Dispersity degree of MWCNT suspension may\u0000be determined by the number of factors such as type and intensity of homogenization equipment, duration of homogenization and some other. The aim of present research consists in the establishment of optimal methodology of\u0000MWCNT suspension homogenization and investigation of dependence between dispersity degree of MWCNT suspension and rheological properties of cement pastes with that suspension. Two types of homogenization methods of\u0000MWCNT were tested such as ultrasonication and homogenization based on rotor-stator principle. The ultrasonication\u0000treatment about 6 min was established as optimal homogenization technique in the course of the current research. The\u0000yield stress and plastic viscosity of cement paste modified by MWCNT suspension increased in comparison with cement paste modified by polycarboxylate ether plasticizer (PCE) in 5 and 30 min after cement pastes mixing.Time of\u0000ultrasonication of MWCNT suspension more than 6 min did not have the influence on rheological behaviour of cement pastes.Addition of MWCNT decreased the volume coefficient of water bleeding of cement paste with PCE by\u000018%.","PeriodicalId":169478,"journal":{"name":"The proceedings of the 13th international conference \"Modern Building Materials, Structures and Techniques\" (MBMST 2019)","volume":"331 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115950876","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

Wall blocks based on the aggregates from plant wastes 墙体砌块基于植物废料的集料

The proceedings of the 13th international conference "Modern Building Materials, Structures and Techniques" (MBMST 2019) Pub Date : 2019-12-03 DOI: 10.3846/mbmst.2019.037

Andrei Dalzhonak, A. Bakatovich

{"title":"Wall blocks based on the aggregates from plant wastes","authors":"Andrei Dalzhonak, A. Bakatovich","doi":"10.3846/mbmst.2019.037","DOIUrl":"https://doi.org/10.3846/mbmst.2019.037","url":null,"abstract":"The article considers the possibility of using agricultural waste in the development of new building materials\u0000in the form of wall blocks. When selecting the compositions, the ideal fractions and ratios of straw to flax were determined, providing the forming of the densest frame of coarse and fine aggregates. Cement and lime were used as a binder.\u0000The effect of humidity on the durability and thermal conductivity of straw wall blocks and straw flax boon blocks were\u0000investigated. The conditions for the possible occurrence of mold on the block surface of aggregates were studied. According to the results of full-scale tests, the obtained dependencies of the temperature distribution during the coldest\u0000period of the winter season were analyzed and the high insulating ability of wall blocks was confirmed. The dependencies of the distribution of humidity over the thickness of the wall blocks after the end of the winter season testing\u0000operations were revealed. As a result of the research, a solution for the rational use of plant waste building wall blocks\u0000was proposed. The blocks can be applied to the construction of load-bearing and nonload-bearing walls in one-story\u0000buildings and multi-story frame construction when filling exterior wall openings.","PeriodicalId":169478,"journal":{"name":"The proceedings of the 13th international conference \"Modern Building Materials, Structures and Techniques\" (MBMST 2019)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127654726","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

Volume changes of concrete in interaction with sliding joint 混凝土与滑缝相互作用时的体积变化

The proceedings of the 13th international conference "Modern Building Materials, Structures and Techniques" (MBMST 2019) Pub Date : 2019-12-03 DOI: 10.3846/mbmst.2019.070

M. Kropáček, R. Čajka, P. Mynarčík

{"title":"Volume changes of concrete in interaction with sliding joint","authors":"M. Kropáček, R. Čajka, P. Mynarčík","doi":"10.3846/mbmst.2019.070","DOIUrl":"https://doi.org/10.3846/mbmst.2019.070","url":null,"abstract":"The paper describes volume changes of cement plain concrete and steel fiber reinforced concrete with strength class C 30/37 in interaction with sliding joints. In the research experiment was performed large-dimensional specimens, on which volume changes were measured using string strain gauges. Below the large-dimensional specimens were designed sliding joints. The specimens were placed in a controlled laboratory environment and in an outdoor environment to simulate real conditions during construction and the measurements were carried out for several months. Volume changes of the concrete were compared to each other and significant influence of the sliding joints was observed. Significant influence on the development of volume changes also has dispersed reinforcement. Another part of the article is a comparison of experimental results with calculation models that allow to calculate the final shrinkage of concrete. Comparison results of volume changes with calculation models is important for demonstrating the effect of sliding joint, as currently valid calculation models do not consider the influence of subsoil and sliding joints, and the results are different as expected. For comparison model B4 (Bazant, 2015), model from technical standard EN 1992-1-1 (CSN EN 1992-1-1, 2006), model from fib model code 2010 (FIB, 2010) and model ACI (ACI, 2008) are used. The paper describes a unique experiment dealing with the influence of sliding joint on the development of volume changes of concrete from beginning of setting and hardening of concrete under precisely defined conditions, that allow comparison with calculation models and thus points to the shortcomings of the building practice.","PeriodicalId":169478,"journal":{"name":"The proceedings of the 13th international conference \"Modern Building Materials, Structures and Techniques\" (MBMST 2019)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132580924","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

The role of Thermally Activated Building Systems (TABS) in building energy retrofitting: energy diagnosis and management 热激活建筑系统(TABS)在建筑能源改造中的作用:能源诊断和管理

The proceedings of the 13th international conference "Modern Building Materials, Structures and Techniques" (MBMST 2019) Pub Date : 2019-12-03 DOI: 10.3846/mbmst.2019.109

Rossana Laera, Inmaculada Martínez Pérez, Luis de Pereda Fernández, Ricardo Tendero Caballero, F. Iannone

{"title":"The role of Thermally Activated Building Systems (TABS) in building energy retrofitting: energy diagnosis and management","authors":"Rossana Laera, Inmaculada Martínez Pérez, Luis de Pereda Fernández, Ricardo Tendero Caballero, F. Iannone","doi":"10.3846/mbmst.2019.109","DOIUrl":"https://doi.org/10.3846/mbmst.2019.109","url":null,"abstract":"Thermally Activated Building Systems (TABS) play a major role in building envelope integration. TABS\u0000operate at low temperatures, enabling efficient utilization of renewable sources. Moreover, their combination with other\u0000building energy systems provides a high degree of dynamic interactivity with users, improving the quality of the indoor\u0000thermal environment. In this research, the efficiency of the technology of active pipe-embedded structures is investigated within its practical\u0000application in an existing office building energy retrofit in Spain. Concrete Core Activation (CCA) of the original horizontal structure aims at exploiting its thermal inertial properties and potential storage capability in combination with\u0000low-grade energy production systems and devices, such as geothermal heat pumps. A proper methodology of energy diagnosis is aimed at the optimization of TABS performance in building retrofitting.\u0000Significant energy savings could be achieved by applying appropriate solutions, control strategies and corrective actions\u0000for TABS. The continuity of energy management and follow-up has been proven necessary to keep high standards in\u0000terms of TABS energy performance, targeting the identification of energy saving opportunities for the improvement of\u0000energy efficiency.","PeriodicalId":169478,"journal":{"name":"The proceedings of the 13th international conference \"Modern Building Materials, Structures and Techniques\" (MBMST 2019)","volume":"25 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132152905","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

Design errors and performance defects as causes of the risk for a collapse of the ceiling of the concert hall 设计错误和性能缺陷可能导致音乐厅天花板坍塌

The proceedings of the 13th international conference "Modern Building Materials, Structures and Techniques" (MBMST 2019) Pub Date : 2019-12-03 DOI: 10.3846/mbmst.2019.123

R. Chmielewski, L. Kruszka

{"title":"Design errors and performance defects as causes of the risk for a collapse of the ceiling of the concert hall","authors":"R. Chmielewski, L. Kruszka","doi":"10.3846/mbmst.2019.123","DOIUrl":"https://doi.org/10.3846/mbmst.2019.123","url":null,"abstract":"The issue presented concerns the proper assessment of a ceiling underneath a modernised concert hall in a\u0000historic building as a case study. The reason for a reconstruction was to replace a wood block floor with stone slab floor\u0000made of marble. Shortly after the construction works, cracks which appeared, made the floor unsuitable for further use.\u0000In order to determine the cause of the damage, a detailed analysis of a state of the construction was performed within\u0000the technical diagnostics. The first element that was inspected was the way the cracks were distributed. This layout was\u0000typical for overloading of ceiling. It was assumed that the thickness of the concrete overlay of the Ackerman floor was\u00009 cm. In order to verify the actual layout of the floor layers, five different opencast works were taken from the top level\u0000of the floor cavity blocks. The actual layout of the uncovered parts differed from both the assumptions that were made\u0000and the new design. The arrangement of the floor layers that differed from the design documents, caused the overloading\u0000of the supporting structure of the Ackerman floor. Additionally, an incorrect design assumption has overlapped.","PeriodicalId":169478,"journal":{"name":"The proceedings of the 13th international conference \"Modern Building Materials, Structures and Techniques\" (MBMST 2019)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125065258","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