Pavilion is an important type of garden architecture, which has its unique construction method and rules during construction. The size of the pavilion is not large, but the changes in shape are indeed diverse and very flexible. The shape of the pavilion mainly depends on its plane shape, combination on the plane, and the shape of the roof. Below, Shandong pavilion manufacturers mainly introduce the structural characteristics of pavilion buildings from the roof level.
(1) Curvature of the roof
The roof structure of the traditional pavilion should be considered from the practical aspect of rainproof, and the rainwater should fall as quickly as possible. In theory, the cycloid structure of the roof will make the rainwater fall at a fast speed, so that the rainwater will stay on the roof for a short time. Bamboo materials are difficult to form curvature, so when dealing with rainwater, the upper and lower halves of bamboo are interlocked into concave corners, forming a natural water outlet.
(2) The corner of the house is upturned
The rise and fall of the wing angles (also known as rush out) are important factors that determine the image of the pavilion roof corridor. When the lifting height is high, more beam stacks need to be stacked for production. There are no certain rules for the punching and tilting of Hunan claw horns. Generally, the punching value is relatively small, but there is more tilting, and the ratio of punching and tilting reaches about 1:2. For polygonal pavilions with claw angles greater than 90 °, the impact value can also be increased accordingly, and the effect of looking up is better. However, for triangular pavilions, the impact value should be as small as possible, for the same reason as the eaves mentioned earlier.
The eaves width of small and large wooden pavilions is 3/10 of the column height. Generally, the eaves height of small pavilions is within 3m, while the eaves width is around 80-100cm. For reinforced concrete pavilions, this scale can be appropriately enlarged to make them more lightweight, but should not be reduced.
(4) Lifting the roof of the pavilion
Hall lifting is a method of gradually increasing the slope of the roof from the eaves step by step (i.e. the distance between purlins, about 1.5~1.8m), forming a concave and curved roof. Regardless of the size of the pavilion, divide the eaves into at least 4 intervals based on the horizontal length between the ridges of the roof (the width of the placed treasure roof should be deducted when dividing the intervals), so that there are at least 5 control points on the curve for easy construction and setting out.
(5) Example table of lifting coefficient sequence
The traditional wooden structure roof adopts the method of lifting eaves and towering buildings, that is, adding a pair of herringbone wood at both ends of the wooden frame. The characteristic of this roof curve is that the slope change of the middle large section is relatively gentle and the changes at both ends are large. It is more suitable for roofs with larger depth, and this curve can also be used when the pavilion is large.
However, the use of reinforced concrete beam and slab structures can be free from the constraints of wooden roof truss nodes. When dividing intervals, unequal intervals can be arbitrarily used, which can lengthen the intermediate interval that needs to be gentle. However, in this case, the above method of calculating the total height cannot be used, and the lifting height needs to be calculated in sections and then stacked.
(6) Starting point
The old angle beams of traditional pavilions are picked out from the gold truss, and the wing angle rafters are radially distributed from the center of the gold column. The warping point of the wing angle must be on the dividing line of the gold truss. Small pavilions generally do not have gold columns, and the roof structure is usually supported by a raked beam. When the raked beam falls at 1/4 of the width of the pavilion, the starting warping point must also fall at this point. Therefore, the eaves of northern pavilions have a straight section about half the length of the bay.
That's all for introducing the structural characteristics of pavilion buildings from the roof level. I hope it can help you. For more information, please come to our website http://www.puwff.com consulting service