Soil–steel structure design by the Ontario Code: Part 1. General and geotechnical considerations

1981 ◽  
Vol 8 (3) ◽  
pp. 317-330 ◽  
Author(s):  
Cameran Mirza ◽  
Baidar Bakht
Keyword(s):  
Soil Structure ◽  
Steel Plate ◽  
Steel Structure ◽  
Steel Structures ◽  
Structure Design ◽  
Soil Structure Interaction ◽  
Design Code ◽  
Metallic Shell ◽  
Engineering Aspect ◽  
Soil Component

The paper presents an overview of the Ontario Highway Bridge Design Code provisions dealing with the design of soil–steel structures, which are composed of shells of corrugated steel plate, embedded in an envelope of engineered soil. In particular, the paper deals with the engineering aspect of the soil component of the structure. The soil–structure interaction is discussed in the context of arching of dead loads and the influence of soil properties on the ability of the metallic shell to sustain loads. Hydraulic, geotechnical, and other aspects of soil–steel structure design, such as durability and construction, are also briefly discussed.

Soil–steel structure design by the Ontario Code: Part 2. Structural considerations

1981 ◽  
Vol 8 (3) ◽  
pp. 331-341 ◽  
Author(s):  
G. Abdel-Sayed ◽  
Baidar Bakht
Keyword(s):  
Steel Structure ◽  
Steel Structures ◽  
Empirical Method ◽  
Structure Design ◽  
Live Load ◽  
Finite Element Program ◽  
Worked Example ◽  
Metallic Shell ◽  
Element Program ◽  
Load Effects

The paper presents provisions of the Ontario Bridge Design Code for the structural design of the metallic shell of soil–steel structures, and also discusses the development background of these provisions. A simplified method of determining live load effects in the metallic shell is presented. The method is based on results of a well-tested plane strain finite element program. An empirical method for determining live load effects, which is based on tests of full-size structures, is also given. A worked example is given to illustrate the usage of the design provisions.

scholarly journals Response of Steel Moment and Braced Frames Subjected to Near-Source Pulse-Like Ground Motions by Including Soil-Structure Interaction Effects

2017 ◽  
Vol 3 (1) ◽  
pp. 15-34 ◽  
Author(s):  
Pooriya Ayough ◽  
Sara Mohamadi ◽  
Seyed Ali Haj Seiyed Taghia
Keyword(s):  
Seismic Response ◽  
High Frequency ◽  
Soil Structure ◽  
Steel Structures ◽  
Soil Structure Interaction ◽  
Ductility Demand ◽  
Structure Interaction ◽  
Near Fault ◽  
Frequency Components ◽  
Pulse Type

Most seismic regulations are usually associated with fixed-base structures, assuming that elimination of this phenomenon leads to conservative results and engineers are not obliged to use near-fault earthquakes. This study investigates the effect of soil–structure interaction on the inelastic response of MDOF steel structures by using well known Cone method. In order to achieve this, three dimensional multi-storey steel structures with moment and braced frame are analysed using non-linear time history method under the action of 40 near-fault records. Seismic response parameters, such as base shear, performance of structures, ductility demand and displacement demand ratios of structures subjected to different frequency-contents of near-fault records including pulse type and high-frequency components are investigated. The results elucidate that the flexibility of soil strongly affects the seismic response of steel frames. Soil–structure interaction can increase seismic demands of structures. Also, soil has approximately increasing and mitigating effects on structural responses subjected to the pulse type and high frequency components. A threshold period exists below which can highly change the ductility demand for short period structures subjected to near-fault records.

Visual C++-Based Algorithm Research and Software Development for Cold-Formed Thin-Wall Steel Sectional Properties of Arbitrary Section

2014 ◽  
Vol 889-890 ◽  
pp. 37-42
Author(s):  
Min Qian Zhang ◽  
Qi Lin Zhang ◽  
Zhi Guo Chang
Keyword(s):  
Exact Solution ◽  
Software Development ◽  
Steel Structure ◽  
Data File ◽  
Structure Design ◽  
Thin Wall ◽  
Design Code ◽  
Arbitrary Section ◽  
Calculation Module ◽  
Design Software

Current steel structure design software cannot calculate sectional properties of user-defined section of cold-formed thin-wall steel accurately. Since the sectional properties data given by design code has been implanted into corresponding modules of these software and the software disregard the radian of corner of steel, erroneous results will be generated if the user-defined sectional size doesn't match the sectional size of the data file implanted. According to Green's theorem, the author derived precise formulas for sectional properties of arbitrary section and developed software for calculation based on Visual C++ platform. The software which can calculate exact solution of sectional properties of arbitrary section has been verified by comparing results from various methods. This software can be used independently as a calculating tool and the calculation module can be implanted into other steel structure design software to make calculation for sectional properties of arbitrary section possible.

Seismic behavior of structures considering uplift and soil–structure interaction

2017 ◽  
Vol 20 (11) ◽  
pp. 1712-1726
Author(s):  
Farhad Behnamfar ◽  
Seyyed Mohammad Mirhosseini ◽  
Hossein Alibabaei
Keyword(s):  
Seismic Behavior ◽  
Soil Structure ◽  
Nonlinear Dynamic Analysis ◽  
Steel Structures ◽  
Soil Structure Interaction ◽  
Structure Interaction ◽  
Nonlinear Seismic Response ◽  
Tensile Forces ◽  
Fixed Base ◽  
Flexible Base

A common assumption when analyzing a structure for earthquake forces is that the building is positively attached to a rigid ground so that it can sustain possible tensile forces without being detached, or uplifted, from its bearing points. Considering the facts that almost no tension can be transferred between a surface foundation and soil and soft soils interact with the supported structure during earthquakes, in this research, the effects of uplift and soil–structure interaction on nonlinear seismic response of structures are evaluated. Several reinforced concrete and steel structures under different suits of consistent ground motions are considered. The base of the buildings is modeled with vertical no-tension springs being nonlinear in compression. The total soil–structure interaction system is modeled within OpenSees, and the seismic behavior is evaluated using a nonlinear dynamic analysis. The nonlinear responses of buildings are determined and compared between three cases: fixed base, flexible base without uplift, and flexible base with uplift. The cases for which uplift in conjunction with soil–structure interaction should be considered are identified.

scholarly journals ON APPLICATION OF COMBINED PILE-RAFT FOUNDATIONS FOR ROAD STRUCTURES

2020 ◽  
Author(s):  
Steffen Leppla ◽  
Arnoldas Norkus
Keyword(s):  
Soil Structure ◽  
Soft Soil ◽  
Structure Design ◽  
Bridge Engineering ◽  
Soil Structure Interaction ◽  
Design Solution ◽  
Natural Soil ◽  
Soil Layers ◽  
Structure Interaction ◽  
Raft Foundations

Roads and road infrastructure systems are designed to satisfy ultimate and serviceability conditions under long-term actions caused by transport loadings and environmental effects. Selected design solutions must be safe and rational in terms of construction and maintenance costs. In cases when weak or soft soil layers of natural soil profiles are shallow and/or the traffic loads are very large, the Combined Pile-Raft Foundation (CPRF) is the economical road and railway structure design solution. Application of CPRF is cheaper geotechnical solution comparing with soil change or usual piled foundation alternatives. The development of this system is based on the analysis of relevant mechanical properties of soil layers and the evaluation of the soil-structure interaction. The soil-structure interaction is of highest importance allowing proper evaluation of load bearing resistance and deformation transmitted by raft and piles to soil layers. The soil and foundation system usually is subjected by loadings, resulting elastic-plastic resistance range. Therefore, relevant nonlinear physical laws due to the stress levels are used. The paper purpose is summarizing the experience of application of Combined Pile-Raft Foundations used in road and railway construction and bridge engineering.

Theoretical Analysis of Bending Capacity of U-Section Steel-Encased Concrete Composite Beams with the Full Connection Design

2011 ◽  
Vol 99-100 ◽  
pp. 327-331 ◽  
Author(s):  
Xue Jun Zhou ◽  
Ting Zhang
Keyword(s):  
Concrete Beams ◽  
Steel Structure ◽  
Composite Beams ◽  
Structure Design ◽  
Theoretical Formula ◽  
Design Code ◽  
Shear Connection ◽  
Bending Capacity ◽  
Connection Design ◽  
Good Agreement

The theoretical formula is proposed for cross section’s bending capacity of simply-supported U-section steel-encased concrete composite beams. The result shows that the theoretical formula is in good agreement with the experimental results. This paper concludes that the calculated values based on current steel structure design code of China are very close to the experimental ones. Therefore, this kind of composite beams can be analyzed based on the calculation methods of composite steel and concrete beams in steel structure design code, and it is accurate to calculate the bending capacity based on the assumption of complete shear connection.

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