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003941
2023-10-19
Overview
Multilayer Surfaces Add-On
Analysis Method
Input
Results
Calculation examples

Cross-laminated timber

Model

A ceiling system is calculated as a continuous beam. This example is described in the textbook [1], Chapter 11.2 "Floor as Two-Span Beam".

Example Slab 11.2 LC1
Example Slab 11.2 LC1

The span is 4.5 m in the first bay and 5.2 m in the second bay.

Example Slab 11.2 LC2
Example Slab 11.2 LC2

Constant surface loads of 2 kN/m2 in load case 1 and 2.5 kN/m2 in load case 2 are applied. In order to keep the dead weight identical to the literature example, an additional weight of 1.21 kN/m2 is applied in load case 1.

It is calculated on the effective 1 m wide cross-sectional strip. The support is carried out with linear supports in uZ immovable on all three supports. The middle support is also immovable in uX. Furthermore, a nodal support is arranged there in the Y-direction so that the system does not become kinematic.

plate element

The structure of the plate element is BSP L7s2 (30l - 30l - 30w - 40l - 30w - 30l - 30l)

Cross-section XLAM
Cross-section XLAM

This results in the following stiffness:

9712 kNm0000000936 kNm000000398 kNm0000021361 kN/m00006603 kN/m0001920000 kN/m00720000 kN/m0106260 kN/m
Stiffness Matrix Example Slab 11.2

The calculation of the stiffness is explained in chapter Stiffnesses for multilayer surfaces .

References
  1. Wallner-Novak, M .; Koppelhuber, J .; Pock, K .: Cross-laminated timber design, principles for statics and construction according to Eurocode, 2013, proHolz Austria
Parent Chapter

Model

Example Slab 11.2 LC2
484x
26x
Example Slab 11.2