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  1. Impact of a Passenger Car on a Carport

    Impact Load of a Passenger Car on a Carport

    The fundamental requirements of a structural system are, according to the basis of structural design, sufficient ultimate limit state, serviceability and resistance. Structures must be designed in such a way that no damage occurs due to events such as the impact of a vehicle.

  2. Influence of the Load Duration on the Design Value of the Strength

    Load Combinations in Timber Structures for European and American Timber Standards

    In addition to determine loads, there are some particularities concerning the load combinatorics in timber design which have to be considered. Contrary to steel structures where the largest loading results from all unfavorable actions, in timber construction, the strength values are dependent on the load duration and the timber humidity. Special characteristics have to be considered as well for the serviceability limit state design. The following article discusses the effects on the design of wooden elements and how this is possible with RSTAB and RFEM.

  3. Structural System and Cross-Section Dimension According to [1]

    Modeling of Semi-Rigid Composite Beam Made of Timber as Surface Model

    There are several options to calculate a semi-rigid composite beam. They differ primarily in the type of modeling. Whereas the Gamma method ensures a simple modeling, additional efforts are required when using other methods (e.g. shear analogy) for the modeling which are, however, offset by the much more flexible application compared to the Gamma method.
  4. Figure 01 - Modeling Curved Beams

    Design of Curved Glulam Beams According to ANSI/AWC NDS

    RFEM offers the possibility to model also curved beams. To do this, a curved line must be created first (see Figure 01).This line can then be assigned a beam with a cross-section. The advantages over modeling with beam segments are the easier handling during the modeling as well as the clearer results output of the internal forces.

  5. Figure 01 - Dialog Box "Generate Wind Loads - Vertical Walls with Roof According to ASCE/SEI 7-16"

    Generating Wind Loads on Walls and Roofs According to ASCE/SEI 7-16

    RFEM and RSTAB allow you to easily consider wind load effects on a three-dimensional building according to ASCE/SEI 7‑16 [1]. This article explains the complex theory of entering wind loads in the software. You can find the wind load under “Tools” → “Generate Loads” → “From Wind Loads.”

  6. Local Effects Relating to Load Introduction

    Stability Analysis of Two-Dimensional Structural Components on Example of Cross-Laminated Timber Wall 3

    This article explains the alternative to the equivalent member method. It offers the option to determine internal forces of the wall susceptible to buckling according to the second-order analysis considering the imperfections and to subsequently perform the cross-section design for bending and compression.

  7. Structure of Layers with Stiffness and Strength Properties for Stora Enso CLT 100 C5s

    Stability Analysis of Two-Dimensional Structural Components on Example of Cross-Laminated Timber Wall 2

    The following article describes design using the equivalent member method according to [1] Section 6.3.2, performed on the example of cross-laminated timber wall susceptible to buckling described in Part 1 of this article series. The buckling analysis will be performed as a compressive stress analysis with reduced compressive strength. For this, the instability factor kc is determined, which depends primarily on the component slenderness and the support type.

  8. Cross-Laminated Timber Wall with Openings Subjected to Wall Stress

    Stability Analysis of Two-Dimensional Structural Components on Example of Cross-Laminated Timber Wall 1

    Basically, you can design structural components made of cross-laminated timber in the RF-LAMINATE add-on module. Since the design is a pure elastic stress analysis, it is necessary to additionally consider the stability issues (flexural buckling and lateral-torsional buckling).

  9. Useful Application of Function "Reduce Number of Generated Combinations"

    Useful Application of Function "Reduce Number of Generated Combinations"

    This post describes two practical examples based on the Eurocodes where the reduction of combinations is reasonable. There is a large number of various National Annexes as well as several material standards (EC 2 to EC 9) that are not in compliance with the rules for structural design (EC 0).

  10. Tension Connections in RF-/JOINTS Timber - Steel to Timber

    Tension Connections in RF-/JOINTS Timber - Steel to Timber

    In the case of tension connections with cleats subjected to unilateral loading, the external members (side timber) are loaded by an additional bending moment due to the eccentric load distribution. However, this fact is not mentioned in EN 1995‑1‑1 and is considered in the National Annex to DIN EN 1995‑1‑1 by the reduction of the tensile strength. This reduction depends on the pull‑off strength of the fasteners.

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