Research on dynamic data monitoring of steel structure building information using BIM

2020 ◽  
Vol 18 (5) ◽  
pp. 1165-1173
Author(s):  
Ying Xia
Keyword(s):  
Monitoring System ◽  
Steel Structure ◽  
Dynamic Monitoring ◽  
Dynamic Information ◽  
Dynamic Data ◽  
Content Type ◽  
Structure Building ◽  
Information Monitoring ◽  
Building Information

Purpose This study aims to analyze the dynamic monitoring of deformation damage of steel structure buildings in long-term use. Although the steel structure building has the advantage of high structural strength, it will be deformed after being affected by factors such as corrosion and impact during long-term use, and which will affect building safety, especially the public building facilities. The dynamic monitoring of its security is an indispensable means. Design/methodology/approach This paper briefly introduced the principle of building information modeling (BIM)-based steel structure building information monitoring and the dynamic information monitoring system based on this principle. Then the monitoring system was used to analyze an operational steel structure suspension bridge in Xinxiang City, Henan Province, China, and compared it with the monitoring system based on back propagation (BP) neural network. Findings The results showed that the fitting degree of the dynamic deformation displacement data processed by BIM-based monitoring system was higher than that processed by BP-based monitoring system. Based on the comprehensive comparison of the dynamic data of all monitoring points, the BIM-based monitoring system had higher accuracy of deformation displacement monitoring and reliability of structural safety evaluation. Originality/value In summary, the BIM-based steel structure building monitoring system can effectively monitor the dynamic information of steel structure information.

scholarly journals Deformation Monitoring and Stability Analysis of Shaft Lining in Weakly Cemented Stratum

2018 ◽  
Vol 2018 ◽  
pp. 1-12 ◽  
Author(s):  
Xianzhou Lyu ◽  
Weiming Wang
Keyword(s):  
Real Time ◽  
Monitoring System ◽  
Coal Mine ◽  
Deformation Monitoring ◽  
Dynamic Monitoring ◽  
Thick Wall ◽  
Additional Stress ◽  
The Real ◽  
Shaft Lining

Shaft linings in thick weakly cemented stratum have the disadvantages of large deformation and repeated damage after repair. Considering the typical geologic characteristics and the failure characteristics of shaft linings, we establish a multilayer automatic deformation monitoring system in this paper, and the monitoring system can realize the real-time, continuous, and long-term dynamic monitoring on shaft linings. Based on the concrete strength failure criterion under biaxial compression and the analytical solution for spatially axisymmetric problem of thick-wall cylinders, the damage limit of the shaft lining in Xieqiao coal mine is obtained. Then, we choose three sections as the test area according to the typical damage forms of shaft linings to carry out the monitoring scheme on the auxiliary shaft in Xieqiao coal mine. The monitoring results show that the extreme value of the shaft lining deformation is 2.369 mm. And the shaft lining located in the border between the floor aquifer and the bedrock generates the most severe deformation, which is about 89.4% of the deformation limit. The shaft lining deformation increment fluctuates in certain range, which belongs to elastic deformation. Finally, we inverse the stress state according to the deformation value of the shaft lining, and the obtained additional stress is found to be lower than the ultimate compressive strength. Long-term project practice confirms that the deformation monitoring results can reflect the real stress condition of the shaft lining and that the monitoring system can realize the real-time dynamic evaluation for the status of the shaft lining.

Study on the joint mechanical properties of steel structure buildings

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Jiaqiang Chen
Keyword(s):  
Mechanical Properties ◽  
Design Methodology ◽  
Vertical Direction ◽  
Steel Structure ◽  
Paper Briefly ◽  
Joint Stress ◽  
Content Type ◽  
Structure Building ◽  
The Stability ◽  
Supporting Frame

PurposeThe main supporting frame of steel structure buildings is steel, and the beam-column joints of the steel structure directly affect the stability and strength of the supporting frame.Design/methodology/approachThis paper briefly introduced the beam-column joints which are used for ensuring the stability of buildings in the steel structure building, selected the fabricated beam-column joints which were different from the traditional welding methods, tested the fabricated beam-column joints with the reaction frame and jack and detected the influence of the thickness and length of the splice plate on the mechanical properties of joints.FindingsThe results showed that the joint stress and the displacement in the vertical direction increased under greater load no matter which kind of fabricated joint was used; under the same load, the thickness and length of the splice significantly affected the mechanical properties of joints, and the larger the thickness and length, the smaller the joint stress and displacement in the vertical direction.Originality/valueTo sum up, increasing the thickness or length of the splice plate of the fabricated joint can effectively improve the mechanical properties of joints.

Assessing maturity development of purchasing management in construction

2015 ◽  
Vol 22 (6) ◽  
pp. 1033-1057 ◽  
Author(s):  
Jan van Lith ◽  
Hans Voordijk ◽  
Julieta Matos Castano ◽  
Bart Vos
Keyword(s):  
Integrated Approach ◽  
Purchasing Management ◽  
Substantial Part ◽  
Content Type ◽  
Construction Firms ◽  
Construction Companies ◽  
Building Information ◽  
Multiple Case ◽  
Integrated Supply Chain

Purpose – Prime contractors spent a substantial part of their turnover on purchasing. The management of the purchasing function therefore has a large influence on the overall performance of a prime contractor. The more developed the purchasing function is, the greater its contribution to success of the companies. The purpose of this paper is to measure and explain the development in maturity of the purchasing function in construction firms. Design/methodology/approach – Based on a literature review, a theoretical framework for the assessment of purchasing maturity is provided first. Then a longitudinal multiple case study is executed in order to assess the maturity development of the purchasing function in seven construction companies. Results are compared with a historical baseline assessment. Findings – The results demonstrate an increase in the maturity of the purchasing function in general and in particular in the management of strategic relations. The case companies have reached a maturity in which they start to coordinate activities in their supply chains. Increased use of IT solutions enables a more integrated approach of the construction process. Practical implications – IT and in particular Building Information Modelling pave the path towards an integrated supply chain, which in turn enables the reduction of waste in the processes. Nevertheless, companies still struggle with the tension between project-based flexibility and long-term relations with suppliers. Originality/value – The development of purchasing maturity was measured in a baseline measurement and in a second assessment performed five years later by using the exact same model and exact same case companies.

Remote Dynamic Monitoring System in Groundwater Engineering

2014 ◽  
Vol 635-637 ◽  
pp. 705-710
Author(s):  
Yun Shi ◽  
Li Li Pang
Keyword(s):  
Data Acquisition ◽  
Monitoring System ◽  
Groundwater Monitoring ◽  
Groundwater Resources ◽  
Dynamic Monitoring ◽  
Management Service ◽  
Monitoring Equipment ◽  
Dynamic Data ◽  
Groundwater Dynamic ◽  
Dynamic Data Acquisition

In recent years, the exploitation and utilization of groundwater resources in the development of society plays a very important role. From the view of groundwater monitoring system, there are still a lot of problems, such as obsolete monitoring equipment, imperfect monitoring system. To solve these problems, by conducting studies of groundwater dynamic data acquisition and transfer of technology, research and development suited to China's national conditions groundwater monitoring series of instruments. Development of multi-level and multi-source remote management software base on network, build a set of groundwater dynamic data acquisition, storage, transmission, management, and remote control of the information service platform. It has been applied in a number of major projects for the construction and operation of the groundwater monitoring network in China to provide reliable monitoring equipment and management service software.

Incorporating Blockchain technology in construction management

2019 ◽  
Vol 35 (10) ◽  
pp. 1-3 ◽  
Author(s):  
Mahdi Safa ◽  
Sylvia Baeza ◽  
Kelly Weeks
Keyword(s):  
Construction Management ◽  
Project Managers ◽  
Information Modeling ◽  
Senior Executives ◽  
Systematic Analysis ◽  
Content Type ◽  
Blockchain Technology ◽  
Building Information ◽  
Processing Component

Purpose This study explores the use of Blockchain technology as a new solution to many current problems in construction information management. The study shows that Blockchain has the potential to address several issues such as confidentiality, provenance tracking; monitoring channel and ledger metrics; disintermediation; non-repudiation; change tracing; multiparty aggregation; traceability inter-organizational recordkeeping; and data ownership. Design A systematic analysis of a paper published, “Potentials of Blockchain Technology for Construction Management,” is offered. The structured results are provided for the purpose of contributing to the discussion of the topic. Findings The results of this study shows that the suitable position for the integration of Blockchain is the interface-points of the transaction processing component of the Building Information Modeling server. This technology also can help in controlling and fingerprinting all information exchanges and communication. The conclusion drawn from the study provides a foundation from which further research can be developed. Originality and Value The findings of this study will help construction project managers and senior executives with a deeper understanding of Blockchain technology and its long-term implications for the construction industry; coupled with knowledge of its relationship to other emerging technologies such as BIM. Propositions for smart contracts deployment and further research are suggested.

scholarly journals Dynamic Testing and Long Term Monitoring of a Twelve Span Viaduct

2013 ◽  
Vol 569-570 ◽  
pp. 342-349 ◽  
Author(s):  
Xing Hua Chen ◽  
Piotr Omenzetter ◽  
Sherif Beskhyroun
Keyword(s):  
Monitoring System ◽  
Dynamic Testing ◽  
Ambient Vibration ◽  
Dynamic Monitoring ◽  
Ambient Vibration Tests ◽  
Technological Advances ◽  
Live Loads ◽  
Vibration Tests ◽  
Term Monitoring

Because of the critical importance of bridges in land transport networks and broader economy, an increasing interest in permanent observation of their dynamic behavior under traffic, seismic and other live loads has been observed during the past decade. In addition, recent technological advances have made the installation and operation of permanent dynamic monitoring systems much more practical and economical. A multi-channel dynamic monitoring system is being installed in the 12 span pre-cast, post-tensioned Newmarket Viaduct, recently built using the balanced cantilever method and situated in Auckland, New Zealand. This paper first describes the preliminary studies including extensive one-off ambient vibration tests using wireless sensors that provided important information for the design of the monitoring system shortly after construction of the bridge. Then the designed monitoring system is characterized and proposed research that will be undertaken using the monitoring data is outlined.

966-P: The Long-Term Impact of a Flash Glucose Monitoring System on Glycemic Control

Diabetes ◽  
2019 ◽  
Vol 68 (Supplement 1) ◽  
pp. 966-P
Author(s):  
ATSUSHI FUJIYA ◽  
TOSHIKI KIYOSE ◽  
TAIGA SHIBATA ◽  
HIROSHI SOBAJIMA
Keyword(s):  
Glycemic Control ◽  
Monitoring System ◽  
Glucose Monitoring ◽  
Flash Glucose Monitoring ◽  
Long Term Impact ◽  
Flash Glucose Monitoring System

Dual-isotope single-photon emission computerized tomography scanning in patients with glioblastoma multiforme: association with patient survival and histopathological characteristics of tumor after high-dose radiotherapy

1998 ◽  
Vol 89 (1) ◽  
pp. 60-68 ◽  
Author(s):  
Richard B. Schwartz ◽  
B. Leonard Holman ◽  
Joseph F. Polak ◽  
Basem M. Garada ◽  
Marc S. Schwartz ◽  
...  
Keyword(s):  
Survival Rate ◽  
Glioblastoma Multiforme ◽  
Single Photon ◽  
Photon Emission ◽  
High Dose ◽  
Term Survival ◽  
Content Type ◽  
Dual Isotope ◽  
Fine Print

Object. The study was conducted to determine the association between dual-isotope single-photon emission computerized tomography (SPECT) scanning and histopathological findings of tumor recurrence and survival in patients treated with high-dose radiotherapy for glioblastoma multiforme. Methods. Studies in which SPECT with 201Tl and 99mTc-hexamethypropyleneamine oxime (HMPAO) were used were performed 1 day before reoperation in 47 patients with glioblastoma multiforme who had previously been treated by surgery and high-dose radiotherapy. Maximum uptake of 201Tl in the lesion was expressed as a ratio to that in the contralateral scalp, and uptake of 99mTc-HMPAO was expressed as a ratio to that in the cerebellar cortex. Patients were stratified into groups based on the maximum radioisotope uptake values in their tumor beds. The significance of differences in patient gender, histological characteristics of tissue at reoperation, and SPECT uptake group with respect to 1-year survival was elucidated by using the chi-square statistic. Comparisons of patient ages and time to tumor recurrence as functions of 1-year survival were made using the t-test. Survival data at 1 year were presented according to the Kaplan—Meier method, and the significance of potential differences was evaluated using the log-rank method. The effects of different variables (tumor type, time to recurrence, and SPECT grouping) on long-term survival were evaluated using Cox proportional models that controlled for age and gender. All patients in Group I (201Tl ratio < 2 and 99mTc-HMPAO ratio < 0.5) showed radiation changes in their biopsy specimens: they had an 83.3% 1-year survival rate. Group II patients (201T1 ratio < 2 and 99mTc-HMPAO ratio of ≥ 0.5 or 201Tl ratio between 2 and 3.5 regardless of 99mTc-HMPAO ratio) had predominantly infiltrating tumor (66.6%); they had a 29.2% 1-year survival rate. Almost all of the patients in Group III (201Tl ratio > 3.5 and 99mTc-HMPAO ratio ≥ 0.5) had solid tumor (88.2%) and they had a 6.7% 1-year survival rate. Histological data were associated with 1-year survival (p < 0.01); however, SPECT grouping was more closely associated with 1-year survival (p < 0.001) and was the only variable significantly associated with long-term survival (p < 0.005). Conclusions. Dual-isotope SPECT data correlate with histopathological findings made at reoperation and with survival in patients with malignant gliomas after surgical and high-dose radiation therapy.

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