31 research outputs found
Robustness of Prefabricated Prefinished Volumetric Construction (PPVC) High-rise Building
Full text link[EN] Due to the safety awareness arisen from natural and human-caused disasters, robustness design of building is increasingly important to ensure the stability of the building and to prevent progressive collapse. For this reason, the robustness design of innovative construction technologies such as modular construction may be essential due to its relative novel structural form and numerous joints among modules. Particularly in Singapore, Prefabricated Prefinished Volumetric Construction (PPVC) has been highly promoted in residential and commercial buildings, hostels and hospitals to boost the construction productivity and quality as well as to reduce the reliance on foreign workforce. PPVC offers high quality and efficiency because most of the finishes and mechanical and electrical services are manufactured and installed together with the modules in factory, before sending for on-site assembly. To maximize the productivity of PPVC, modular design standardization and repetition can be improved by going for high-rise. Nonetheless, there are limited studies on the robustness of PPVC high-rise building and its behavior under progressive collapse remains uncertain. Therefore, this paper investigates the robustness of steel PPVC high-rise building under column removal scenarios by conducting non-linear numerical analysis. The effects of joint design and diaphragm action between modules are studied to ensure continuity of horizontal and vertical tying. This paper provides insight on the behaviour and alternative path for load transfer under column removal scenario for future design guideline of robustness PPVC building.The authors would like to acknowledge the financial support by the National Research Foundation (NRF) and SembCorp-NUS Corp Lab under project grant R-261-513-009-281Chua, YS.; Liew, JYR.; Pang, SD. (2018). Robustness of Prefabricated Prefinished Volumetric Construction (PPVC) High-rise Building. En Proceedings of the 12th International Conference on Advances in Steel-Concrete Composite Structures. ASCCS 2018. Editorial Universitat Politècnica de València. 913-919. https://doi.org/10.4995/ASCCS2018.2018.6955OCS91391
Advanced analysis for frame design
No full textRecent research efforts have focused extensively on the development of advanced analysis techniques and their possible application in limit-states design of rigid and semi-rigid steel frames. Both the European and Australian limit states design codes allow use of advanced analysis for design of frames in which the members are made of compact sections and are sufficiently braced against lateral-torsional buckling. Advanced analysis is intended to indicate any method of analysis that sufficiently captures the strength limit states encompassed by specification equations for member proportioning such that the checking of such equations is not required. This thesis is dedicated to the development and application of such methods for the limit-states design of rigid and semi-rigid steel frames. The first part of the thesis provides an overview of the current impetus behind research in inelastic analysis and design. This is followed by a concise encapsulation and some suggestions for improvement of current elastic analysis/design approaches for frame design. Efforts are devoted to investigating possible methods for accurate modeling the inelastic behavior of frame members. The adequacy of second-order elastic-plastic hinge analysis for use as advanced analysis is investigated through a series of benchmark checks. Some limitations of the plastic hinge method for representing number stiffness and strength are identified, which lead to the development of two alternative analysis approaches termed the notional load plastic hinge and refined plastic hinge approaches. The accuracy of these approaches for representing system and member strength and stability is confirmed by comparing the predicted force distributions, load-deformation responses and ultimate strength results with the more exact plastic-zone solutions. The studies conclude that these inelastic analysis approaches have general validity and may be applied for the design of a wide range of frame structures. The proposed inelastic models are accurate also at an individual member level; therefore, member capacity checks can be waived in using these analyses model for planar frame design. The final part of the thesis provides practical methods of incorporating connection flexibility, joint size, panel-zone deformation, and member imperfection effects for assessment of system strength and stability. Examples are provided to illustrate the procedures of using advanced inelastic analysis in conjunction with limit-states design provisions for proportioning steel frame members and joints
Design guide for buildable steel connections, - -Bolted and Welded Connections to SS EN1993-1-8
No full textSingapor
Design of Steel Fiber-Reinforced High-Strength Concrete- Encased Steel Short Columns and Beams
No full textStructural Journal118145-5
Fire performance of composite columns made of high strength steel and concrete
No full text10.1016/j.jcsr.2021.106640Journal of Constructional Steel Researc
