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	1. Finite element modelling and numerical investigation of multi-planar concrete-filled steel tubular KK joints
	CHEN Juan,ZHOU Chengye
	Civil and Architectural Engineering 21 April 2017
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	Abstract:With the development of large span and heavy load modern engineering, concrete-filled steel tubular structures appear constantly. The joints of these structures are mostly multi-planar joints. In order to solve the problem of lacking of the investigation of multi-planar concrete-filled steel tubular (CFST) joints, the mechanical behaviour of CFST KK joints were studied through refined finite element simulation. Accurate finite element models of CFST KK joints were established by considering the material nonlinearity, the geometry nonlinearity, and the contact nonlinearity between the tube and the concrete. The spatial effect of multi-planar joints was be obtained by comparing with uni-planar joints. The FEM results showed that, the multi-planar carry-over effects had the maximum effect for the 60o CFST joints, the strength of multi-planar joints decreased compared with the planar joints, and the stiffness of them did not vary substantially. While for the 90o CFST joints, both the strength and stiffness of multi-planar joints did not vary substantially with the planar joints. This research can provide scientific basis for the design of multi-planar CFST joints, and effectively promote the application of CFST structures.
	TO cite this article:CHEN Juan,ZHOU Chengye. Finite element modelling and numerical investigation of multi-planar concrete-filled steel tubular KK joints[OL].[21 April 2017] http://en.paper.edu.cn/en_releasepaper/content/4726520


	2. Vibration Analysis of Composite Floor under Human loading activity
	Chen Shiming,Olau Bosch i Teixidó
	Civil and Architectural Engineering 16 September 2014
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	Abstract:A numerical study is conducted to investigate the vibration behavior of concrete composite floors with profiled steel-deck under human loading activity. The Finite Element based analytic model is proposed to simulate composite flooring. The dynamic properties of the composite floor are evaluated and the influences of the concrete slab depth, the damping ratio and the presence of openings are analysed. The composite floors are then tested under human induced forces and the dynamic responses of the model are compared with those of the same model with openings. It is found that presence of the openings in the floor slab does not greatly affect the natural frequencies of the system but it changes the peak accelerations under human induced forces.
	TO cite this article:Chen Shiming,Olau Bosch i Teixidó. Vibration Analysis of Composite Floor under Human loading activity[OL].[16 September 2014] http://en.paper.edu.cn/en_releasepaper/content/4610004


	3. Strength and Microstructure Recovery of Fire-Damaged Concrete after Realkalisation
	Xiong Yan ,LIU Fu-An
	Civil and Architectural Engineering 19 December 2012
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	Abstract:The experiments of mercury intrusion porosimetry and compressive strength of concrete after high temperature are performed, and the strength and microstructurer recovery of fire-damaged concrete after realkalisation is investigated. The results show that compressive strength of concrete decreased with the temperature increased, microstructure of concrete becomes worse, and macro porous has evident increase. After realkalisation repairing, compressive strength of concrete is improved to some extent, microstructure is improved obviously, and macro porous is decreased significantly. The variation of microstructure in concrete is in conformity with the change in mechanical properties, which draws a conclusion that realkalisation repairing can recover the strength and microstructurer of concrete after high temperature.
	TO cite this article:Xiong Yan ,LIU Fu-An. Strength and Microstructure Recovery of Fire-Damaged Concrete after Realkalisation[OL].[19 December 2012] http://en.paper.edu.cn/en_releasepaper/content/4506103


	4. Nonlinear Responses Analysis of Pipe-soil Contact Surface
	Jin Liu
	Civil and Architectural Engineering 02 November 2009
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	Abstract:It’s necessary to consider interaction between buried pipeline and soil when analyzing its structure between pipe and soil, which comes down to the slip & separation phenomena and the determination of contact stress distribution at the contact-surface. A three-dimensional finite element analysis model of pipeline-soil system is established with nonlinear contact method under ground permanent deformation. The pipeline is considered as the space thin-shell elements, while the soil surrounding is regarded as solid elements, respectively. The responses at the interface between pipe and soil under fault movement are analyzed with finite element method. The relationship between nonlinear response of the interface and fault displacement, buried depth, ratio of pipe-diameter and wall-thickness & field condition is studied through example analysis. Besides, the contact stress at the interface is researched, and it is founded that intense nonlinear response of the pipe and soil take place near the fault. And pipe friction tangential stress far from the fault reduces as a \"parabolic\" type of approach, rather than to reduce the linear regressive.
	TO cite this article:Jin Liu. Nonlinear Responses Analysis of Pipe-soil Contact Surface [OL].[ 2 November 2009] http://en.paper.edu.cn/en_releasepaper/content/36301


	5. Progressive Collapse Analysis and Safety Assessment for Large-span Steel Truss Roof
	Jiang Xiao-Feng,Chen Yi-Yi
	Civil and Architectural Engineering 23 July 2008
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	Abstract:Due to initial local failures in accident events, domino phenomena or even progressive collapse might arise in some vulnerable structures, and consequently, robustness or collapse resistance becomes one important requirement in structural design. Because of its low redundancy, truss roof used in large-scale public buildings is one system different from that of frame and bearing wall, of which plentiful literatures can be achieved. In order to discover its potential risk, progressive collapse analysis is carried out in this paper using sophisticated tool LS-DYNA, and its redistribution mechanism of internal forces, dynamic response and failure modes are investigated. The conceptions of sensitivity element and key element are put forward to identify different responses of members due to initial failures. Finally, a Safety Assessment Method (SAM) based on static linear analysis is proposed to evaluate collapse resistance performance of truss structures.
	TO cite this article:Jiang Xiao-Feng,Chen Yi-Yi. Progressive Collapse Analysis and Safety Assessment for Large-span Steel Truss Roof[OL].[23 July 2008] http://en.paper.edu.cn/en_releasepaper/content/23028

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