scholarly journals Structural behaviour of insulated foam-timber panels under gravity and lateral loading

2021 ◽  
Author(s):  
Hassan Abbasi
Keyword(s):  
Finite Element ◽  
Cyclic Loading ◽  
Lateral Load ◽  
Expanded Polystyrene ◽  
Load Test ◽  
Residential Construction ◽  
Test Results ◽  
Cyclic Lateral Load ◽  
Modification Factor ◽  
Experimental Findings

A Structural Insulated Panel (SIP) is a structural element of expanded polystyrene insulation (EPS) core sandwiched between two oriented-strand boards (OSB). This research proposes SIPs in low-rise residential construction (i.e. houses and low-residential building), replacing the traditional conventional joist floors and stud walls. This research investigates (i) developing expressions for flexural, compression, monotonic racking and cyclic lateral load capacities of SIPs as compared to the joist/stud wall construction. In this study, the proposed design of SIPs was based on (i) generally established theory for analysis, (ii) assessment of full-scale SIP panels by a loading tester, and (iii) computer modeling using the finite-element modeling. The research program included (i) testing SIP walls in axial compression and bending, (ii) racking and cyclic testing on SIP shear walls, (iii) development of finite-element computer models of the tested SIP panels and verifying those using experimental findings, (iv) correlation between experimental findings and design equations for strength and serviceability available in the literature and wood design Standards. Modification factors of these equations were developed to allow structural engineers to design SIP panels in residential construction more economically reliably. Experimental results showed that SIP panels are being “as good as” the conventional wood-framing of identical sizes, with respect to flexural, compressive, racking and cyclic loading. Also, results showed SIP walls have a greater ability to dissipate energy under racking and cyclic loading that the stud wall system. Therefore, SIP walls can be used so efficient in seismic zones. Based on cyclic lateral load test results, the values of ductility-related force modification factor (Rd) for stud wall, short SIP wall and long SIP wall were calculated as 8%, 22% and 14% lower than the NBCC required value for anchored wall (Rd = 3.0), respectively. In addition cyclic lateral load test results showed that the values of over-strength-related force modification factor (Ro) for stud wall, short SIP wall and long SIP wall were observed to be 17%, 20% and 14% higher than the recommended value of NBCC (Ro = 1.7) for anchored wall, respectively. So, it is concluded that the over-strength factor indicates a confident reserve of resistance in interconnected wall segments.

scholarly journals Structural behaviour of insulated foam-timber panels under gravity and lateral loading

2021 ◽  
Author(s):  
Hassan Abbasi
Keyword(s):  
Finite Element ◽  
Cyclic Loading ◽  
Lateral Load ◽  
Expanded Polystyrene ◽  
Load Test ◽  
Residential Construction ◽  
Test Results ◽  
Cyclic Lateral Load ◽  
Modification Factor ◽  
Experimental Findings

A Structural Insulated Panel (SIP) is a structural element of expanded polystyrene insulation (EPS) core sandwiched between two oriented-strand boards (OSB). This research proposes SIPs in low-rise residential construction (i.e. houses and low-residential building), replacing the traditional conventional joist floors and stud walls. This research investigates (i) developing expressions for flexural, compression, monotonic racking and cyclic lateral load capacities of SIPs as compared to the joist/stud wall construction. In this study, the proposed design of SIPs was based on (i) generally established theory for analysis, (ii) assessment of full-scale SIP panels by a loading tester, and (iii) computer modeling using the finite-element modeling. The research program included (i) testing SIP walls in axial compression and bending, (ii) racking and cyclic testing on SIP shear walls, (iii) development of finite-element computer models of the tested SIP panels and verifying those using experimental findings, (iv) correlation between experimental findings and design equations for strength and serviceability available in the literature and wood design Standards. Modification factors of these equations were developed to allow structural engineers to design SIP panels in residential construction more economically reliably. Experimental results showed that SIP panels are being “as good as” the conventional wood-framing of identical sizes, with respect to flexural, compressive, racking and cyclic loading. Also, results showed SIP walls have a greater ability to dissipate energy under racking and cyclic loading that the stud wall system. Therefore, SIP walls can be used so efficient in seismic zones. Based on cyclic lateral load test results, the values of ductility-related force modification factor (Rd) for stud wall, short SIP wall and long SIP wall were calculated as 8%, 22% and 14% lower than the NBCC required value for anchored wall (Rd = 3.0), respectively. In addition cyclic lateral load test results showed that the values of over-strength-related force modification factor (Ro) for stud wall, short SIP wall and long SIP wall were observed to be 17%, 20% and 14% higher than the recommended value of NBCC (Ro = 1.7) for anchored wall, respectively. So, it is concluded that the over-strength factor indicates a confident reserve of resistance in interconnected wall segments.

scholarly journals Finite Element Analysis of Small Span Reinforced Concrete Trough Railway Bridge

2008 ◽  
Vol 400-402 ◽  
pp. 645-650
Author(s):  
Zhong Quan Zou ◽  
Ola Enochsson ◽  
Guo Jing He ◽  
Lennart Elfgren
Keyword(s):  
Finite Element ◽  
Reinforced Concrete ◽  
Load Distribution ◽  
Spatial Effect ◽  
Load Test ◽  
Test Results ◽  
Railway Bridge ◽  
Static Behavior ◽  
Element Analysis ◽  
Additional Support

The static behavior of a reinforced concrete trough railway bridge is analyzed by finite element method. The influences of load distribution fashion, supporting width of the bearings and the additional support beneath the girder are investigated; and the spatial effect of the stress distribution is studied as well. To confirm the analysis accuracy, the results are calibrated with the field load test results. It is found that the influence of load distribution fashion is minor and negligible, while those of supporting width and additional support are not negligible; and the spatial effect is significant.

Cyclic Lateral Load Test for RC Column–Steel Beam Joints with Simplified Connection Details

2019 ◽  
Vol 145 (8) ◽  
pp. 04019075 ◽  
Author(s):  
Ho-Jun Lee ◽  
Hong-Gun Park ◽  
Hyeon-Jong Hwang ◽  
Chang-Soo Kim
Keyword(s):  
Lateral Load ◽  
Load Test ◽  
Steel Beam ◽  
Rc Column ◽  
Cyclic Lateral Load

Contrastive Finite Analysis of SRC Frame under Cyclic Loading Base on Macroscopic and Microscopic Element

2012 ◽  
Vol 166-169 ◽  
pp. 64-67
Author(s):  
Shan Suo Zheng ◽  
Wei Wang ◽  
Pi Ji Hou ◽  
Ming Xie
Keyword(s):  
Finite Element ◽  
Cyclic Loading ◽  
Finite Element Model ◽  
Bending Moment ◽  
Element Model ◽  
Test Results ◽  
Geometry Model ◽  
Simulation Process ◽  
Correct Model ◽  
Set Up

A macroscopic finite element model and a microscopic one were set up respectively to simulate SRC frame with two bays and three stories under cyclic loading, by comparing the simulation and test results, the authors find that the results obtained from the two finite methods have few differences, and each of them can satisfy the demands of engineering, but the principles established in simulation process were different. The macroscopic finite element model was established by very few elements and the results data were obtained easily and quickly, however, it just attain some macroscopic mechanics data (axial force, bending moment and shearing force etc.). The microscopic finite element model involves complex modeling principle, not only needs more time for dealing with the geometry model, gridding and boundary conditions and so on, but also limited by professional knowledge, which make users establish a correct model hardly. The comparison shows that macroscopic finite element method has many advantages in engineering fields.

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