ORCID Profile
0000-0002-4108-2888
Current Organisation
Bond University
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Publisher: Elsevier BV
Date: 04-2015
Publisher: MDPI AG
Date: 10-07-2023
DOI: 10.3390/BUILDINGS13071756
Abstract: Floor vibration, although not a safety concern, is a prevalent performance complaint in multi-story structures. With the increasing use of mass timber construction, various types of long-span timber floors (LSTFs), including plain cross-laminated timber (CLT), CLT with secondary beams (ribbed-deck), and hybrid systems such as timber–concrete composite (TCC) and CLT on-steel-support beams, are gaining popularity. However, due to limited knowledge regarding their vibration characteristics and acceptance criteria, these construction types are often overlooked during the design stage by architects, engineers, and builders. Existing standards and guidelines primarily calibrated for steel and concrete floors lack a validated and calibrated method for evaluating the vibration performance of LSTFs. Nonetheless, it is essential for structural engineers to address vibration concerns during the design stage and potentially investigate excessive vibration in existing buildings, providing mitigation solutions. This article provides a comprehensive overview, discussion, and analysis of the measurement, analysis, design, perception, and acceptability of vibration of timber floors as outlined in international standards and commonly used guidelines. Experimental and theoretical case studies, including vibration measurements of a CLT floor and a comparison of vibration acceptability in lightweight timber floors using different methods, are reported. The results highlight discrepancies between simplified equation calculations and modal analysis observations, underscoring the limitations of relying solely on simplified equations. Furthermore, it is observed that current modal superposition methods tend to be conservative in predicting floor acceleration and velocity responses. Recommendations are provided for future research in the field to enhance floor vibration assessment techniques, aiming for improved design optimization and occupant comfort.
Publisher: Elsevier BV
Date: 10-2022
Publisher: Elsevier BV
Date: 02-2020
Publisher: Research Publishing Services
Date: 2012
Publisher: CRC Press
Date: 04-07-2018
Publisher: Springer Science and Business Media LLC
Date: 18-01-2023
DOI: 10.1007/S41062-023-01043-7
Abstract: Determination of the early-age compressive strength of concrete is essential for quality assurance, safety, and economy of construction projects. Due to manual operation on construction site, conventional maturity meters are not efficient for live monitoring of the early-age concrete strength. Higher levels of automated and computerised improvements have been made possible by recent developments in wireless communications, sensor technologies, and data processing methods across the construction industry. For real-time monitoring of the early-stage concrete strength, the current study presents an innovative Internet of Things (IoT)-enabled system developed by concrete data sensors (CDS), an Australian-owned private business. The CDS sensor system (the system) communicates with temperature sensors via long-range wide-area network and is linked to a cloud-based platform for data storage. The suggested system’s effectiveness was assessed using three concrete mixtures and developed maturity relationships. It was observed that the predicted early-age compressive strength of the mixes matches well with the actual compressive strength and that the system can effectively automate the characterisation of maturity.
Publisher: CRC Press
Date: 26-11-2013
DOI: 10.1201/B15320-180
Publisher: Elsevier BV
Date: 08-2015
Publisher: Elsevier BV
Date: 05-2018
Publisher: Wiley
Date: 30-07-2014
DOI: 10.1002/TAL.1172
Publisher: Wiley
Date: 04-2016
DOI: 10.1002/TAL.1282
Publisher: Informa UK Limited
Date: 31-10-2016
Publisher: Elsevier BV
Date: 09-2022
Publisher: American Geophysical Union (AGU)
Date: 05-2022
DOI: 10.1029/2021WR031600
Abstract: In his seminal paper on the solution of the infiltration equation, Philip (1969), 0.1016/b978-1-4831-9936-8.50010-6 proposed a gravity time, t grav , to estimate practical convergence time and the time domain validity of his infinite time series expansion, TSE, for describing the transient state. The parameter t grav refers to a point in time where infiltration is dominated equally by capillarity and gravity as derived from the first two (dominant) terms of the TSE. Evidence suggests that applicability of the truncated two‐term equation of Philip has a time limit requiring higher‐order TSE terms to better describe the infiltration process for times exceeding that limit. Since the conceptual definition of t grav is valid regardless of the infiltration model used, we opted to reformulate t grav using the analytic implicit model proposed by Parlange et al. (1982), 0.1097/00010694-198206000-00001 valid for all times and related TSE. Our derived gravity times ensure a given accuracy of the approximations describing transient states, while also providing insight about the times needed to reach steady state. In addition to the roles of soil sorptivity ( S ) and the saturated ( K s ) and initial ( K i ) hydraulic conductivities, we explored the effects of a soil specific shape parameter β , involved in Parlange's model and related to the type of soil, on the behavior of t grav . We show that the reformulated t grav (notably where F ( β ) is a β ‐dependent function) is about three times larger than the classical t grav given by . The differences between the classical t grav,Philip and the reformulated t grav increase for fine‐textured soils, attributed to the time needed to attain steady‐state infiltration and thus i + infiltration for inferring soil hydraulic properties. Results show that the proposed t grav is a better indicator of time domain validity than t grav,Philip . For the attainment of steady‐state infiltration, the reformulated t grav is suitable for coarse‐textured soils. Still neither the reformulated t grav nor the classical t grav,Philip are suitable for fine‐textured soils for which t grav is too conservative and t grav,Philip too short. Using t grav will improve predictions of the soil hydraulic parameters (particularly K s ) from infiltration data compared to t grav,Philip .
Publisher: InTech
Date: 18-01-2017
DOI: 10.5772/66825
Publisher: Wiley
Date: 11-11-2021
Publisher: OMICS Publishing Group
Date: 2016
No related grants have been discovered for Dane Miller.