University of Maryland - Engineering
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Prospective safety performance evaluation on construction sites
This paper presents a systematic Structural Equation Modeling (SEM) based approach for Prospective Safety Performance Evaluation (PSPE) on construction sites
with causal relationships and interactions between enablers and the goals of PSPE taken into account. According to a sample of 450 valid questionnaire surveys from 30 Chinese construction enterprises
a SEM model with 26 items included for PSPE in the context of Chinese construction industry is established and then verified through the goodness-of-fit test. Three typical types of construction enterprises
namely the state-owned enterprise
private enterprise and Sino-foreign joint venture
are selected as samples to measure the level of safety performance given the enterprise scale
ownership and business strategy are different. Results provide a full understanding of safety performance practice in the construction industry
and indicate that the level of overall safety performance situation on working sites is rated at least a level of III (Fair) or above. This phenomenon can be explained that the construction industry has gradually matured with the norms
and construction enterprises should improve the level of safety performance as not to be eliminated from the government-led construction industry. The differences existing in the safety performance practice regarding different construction enterprise categories are compared and analyzed according to evaluation results. This research provides insights into cause–effect relationships among safety performance factors and goals
which
in turn
can facilitate the improvement of high safety performance in the construction industry.
Prospective safety performance evaluation on construction sites
This paper presents a systematic Structural Equation Modeling (SEM) based approach for Prospective Safety Performance Evaluation (PSPE) on construction sites
with causal relationships and interactions between enablers and the goals of PSPE taken into account. According to a sample of 450 valid questionnaire surveys from 30 Chinese construction enterprises
a SEM model with 26 items included for PSPE in the context of Chinese construction industry is established and then verified through the goodness-of-fit test. Three typical types of construction enterprises
namely the state-owned enterprise
private enterprise and Sino-foreign joint venture
are selected as samples to measure the level of safety performance given the enterprise scale
ownership and business strategy are different. Results provide a full understanding of safety performance practice in the construction industry
and indicate that the level of overall safety performance situation on working sites is rated at least a level of III (Fair) or above. This phenomenon can be explained that the construction industry has gradually matured with the norms
and construction enterprises should improve the level of safety performance as not to be eliminated from the government-led construction industry. The differences existing in the safety performance practice regarding different construction enterprise categories are compared and analyzed according to evaluation results. This research provides insights into cause–effect relationships among safety performance factors and goals
which
in turn
can facilitate the improvement of high safety performance in the construction industry.
Prospective safety performance evaluation on construction sites
Abstract\nThis paper presents a systemic decision support approach for safety risk analysis under uncertainty in tunnel construction. Fuzzy Bayesian Networks (FBN) is used to investigate causal relationships between tunnel-induced damage and its influential variables based upon the risk/hazard mechanism analysis. Aiming to overcome limitations on the current probability estimation
an expert confidence indicator is proposed to ensure the reliability of the surveyed data for fuzzy probability assessment of basic risk factors. A detailed fuzzy-based inference procedure is developed
which has a capacity of implementing deductive reasoning
sensitivity analysis and abductive reasoning. The “3σ criterion” is adopted to calculate the characteristic values of a triangular fuzzy number in the probability fuzzification process
and the α-weighted valuation method is adopted for defuzzification. The construction safety analysis progress is extended to the entire life cycle of risk-prone events
including the pre-accident
during-construction continuous and post-accident control. A typical hazard concerning the tunnel leakage in the construction of Wuhan Yangtze Metro Tunnel in China is presented as a case study
in order to verify the applicability of the proposed approach. The results demonstrate the feasibility of the proposed approach and its application potential. A comparison of advantages and disadvantages between FBN and fuzzy fault tree analysis (FFTA) as risk analysis tools is also conducted. The proposed approach can be used to provide guidelines for safety analysis and management in construction projects
and thus increase the likelihood of a successful project in a complex environment.
Bayesian-network-based safety risk analysis in construction projects
Mirosław
Skibniewski
PSI Pittsburgh Testing Lab Div
University of Maryland
University of Maryland
College Park
Project Management Program
Clark School of Engineering
Purdue University
Engaged in teaching
research and educational administration. Served as chief international officer for the institution between 2002 and 2004.
Purdue University
Professor
Teaching and research.
University of Maryland
A.J.Clark Chair
University of Maryland
College Park
Project Management Program
Clark School of Engineering
PSI Pittsburgh Testing Lab Div
Greater Pittsburgh Area
Research Project Engineer