The 3-dimensional behaviour of masonry arches

Most masonry arch structures behave as complex 3-dimensional structures. For the convenience of the analyst such structures are usually modelled as 2-dimensional structures with the effects of their 3-dimensional characteristics being taken into account by modifying the arch parameters and the output of the analysis. The current research programme attempts to model the 3-dimensional nature of masonry arches. An experimental programme comprising tests on skew multi-ring brickwork arch ribs and point loading of a multi-ring brickwork square span arch with an aspect ratio of approximately one is used to validate the modelling [1].

The paper will present the results from two laboratory tests on multi-ring brickwork square span arches. One arch comprised “strong” brickwork whilst the other was constructed using “weak brickwork”. Each arch was tested with two different support conditions in the elastic range. The first with the arch supported only at its springings; the second with the addition of point supports to replicate longitudinal diaphragms. Both arches were loaded to failure with intrados supports. Three-dimensional macro-model is used to simulate the square arch test. The significance of the diaphragm supports on the 3-dimensional behaviour of the arch barrels is discussed and general conclusions and recommendations are presented.

• Introduction

• Experimental Programme

• Finite Element Modelling

• Conclusion

• Acknowledgements

• References