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Xianbo Zhao,황본강,Weisheng Phng 대한토목학회 2014 KSCE JOURNAL OF CIVIL ENGINEERING Vol.18 No.1
While previous studies have focused on the need for Project Risk Management (PRM), highlighting its potential benefits,resources invested in PRM have been rarely identified. This study aims to investigate the resource allocation, effectiveness, impact and understanding of construction PRM in Singapore. To achieve the objectives, a questionnaire survey was conducted with professionals and 43 complete questionnaires were returned. The results revealed that higher proportion of costs was invested in PRM than time and labor resources, and that more resources invested would not necessarily lead to a higher level of PRM effectiveness and greater assurance with the achievement of project objectives. Also, the results showed the low-level understanding of PRM in the survey firms and suggested that the overall impact of PRM on project outcomes differed according to levels of understanding. Despite the low-level understanding, all the nine PRM principles and guidelines were significantly agreed. Hence,this study provides a clear picture of PRM in the Singapore construction industry. The findings of this study can help practitioners to better implement PRM and assure the achievement of project outcomes.
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Developing the Framework of Tacit Knowledge Externalization in International Construction Projects
Qianwen Zhou,Xiaopeng Deng,Bon-Gang Hwang,Xianbo Zhao,Na Zhang 대한토목학회 2022 KSCE JOURNAL OF CIVIL ENGINEERING Vol.26 No.9
Although tacit knowledge management has gained increasing attention in international construction projects, little effort has been devoted to the externalization of tacit knowledge for project managers and members. This research aims to explore various factors that affect the process of tacit knowledge externalization (TKE) in international construction projects and analyze the influencing mechanism and degree of these factors on the externalization effect. Based on the comprehensive literature review and in-depth investigations, a theoretical model and ten hypotheses were established. Then, data collected from 302 respondents were used to test the model and hypotheses. The results indicated that the differences among project members (i.e., culture distance and knowledge distance) reduce members’ willingness to convert tacit knowledge, which negatively impacts the externalization effect. Furthermore, organizational management (i.e., organizational climate and incentive mechanism) plays an active role in increasing members’ externalization willingness. Incentive mechanism and information technology are beneficial to increasing the coding level of knowledge, which positively impacts the externalization effect. Moreover, a strong willingness to convert tacit knowledge helps enhance the coding level of knowledge, thereby improving the effect of TKE. This study advances previous research by developing a framework for TKE in international construction projects, thereby offering recommendations for project managers and members to promote the externalization process.
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A Form-Finding Method of Beam String Structures - Offload by Steps Method
Jihong Ye,Ruo-qiang Feng,Xianbo Zhao,Bin Liu 한국강구조학회 2012 International Journal of Steel Structures Vol.12 No.2
The problem of form-finding of beam string structures was studied, and the method named offload by steps was put forward in accordance with the properties of the mechanical status of the structures. This method was used to find the form of the unstrained state on the basis of the pre-stressed state without the need to assume the unstrained form first. Numerical simulations and experimental research on the form-finding of beam string structures were carried out to verify the offload by steps method and, more importantly, to study the application of the method in engineering practice. The scale of the experimental model was 1/20, and the stretching pattern was the same as that in practical engineering. Comparisons of internal forces and deformations corresponding to unstrained and pre-stressed states of the model were made between experimental and calculation results. The following conclusions were drawn. First, the offload by steps method can be applied to the engineering practice without assuming the form of the unstrained state, and the form of the unstrained state corresponding to that of the pre-stressed state can be obtained directly. Second, the internal forces of the beam string structures in their pre-stressed states can be obtained easily by using the statically-determinate calculation model in the offload by steps method, which can guide design effectively. Third, the method for estimating the cable tension by balancing the deadweight of the beam string truss can be applied to engineering practice.
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