Ibm exhibition pavilion, europe

Part II

The polycarbonate pyramids are formed from 6mm thick, flat sheets, three pyramids being made from each sheet. The chords are made from laminated timber. Short lengths are connected together at the cast aluminium nodes, to which the pyramids are attached, using glued joints. At the top of the pyramids, stainless steel discs are glued in two places to either side of the polycarbonate and to these is bolted a bent stainless steel plate, from which a rod with a rubber block cast on it projects radially. The rubber block has a push with the outer aluminium nodes; it is fixed by an outer cover plate with a screw fitting to the rod.

Although free to rotate radially, the cross-pin is fixed in the building's long direction so that wind forces in this direction are transferred to the 'ladders', which act as frames; the 'ladders' are connected to each other at the apex and mid-point on each side of the building. The cross-members of the 'ladder' are attached to the radial members with bolts. To prevent buckling, the inner radial edges of the pyramids, adjacent to joints, are stiffened by aluminium channels each side of the polycarbo­nate; the channels are bolted together through the polycarbonate, using slotted holes to allow differential thermal movement, and do not carry any axial load. The joint between the arch units is made watertight by an internal and external strip of transparent PVC.

The structural design is influenced by the need to allow for thermal movement of the polycarbonate. As the inner edges of the pyramids increase in length their radius of curvature also increases. This movement is largely unrestricted because of the pinned joints used, only secondary moments occurring in the elements.

Notes:

cross-pin n. поперечный штифт

curvature n. кривизна

disc n. диск

push n. толкатель, кнопка

PVC поливинилхлорид

Ответьте на вопросы к тексту.

1. What are the polycarbonate pyramids formed from?

2. How are elements of the pyramids joined?

3. How are wind forces transferred?

4. Why are the inner radial edges of the pyramids stiffened by aluminium channels?

5. How is thermal movement of the polycarbonate allowed for?

Грамматические упражнения

Упражнение 1.Найдите в тексте предложения с независимым причастным оборотом и переведите их на русский язык.

Лексические упражнения

Упражнение 1. Переведите на русский язык приведённые ниже слова и словосочетания. Если Вы не знаете слово, найдите его в словаре. Выпишите из словаря то значение слова, в котором оно использовано в тексте.

axial load, mid-point (n.), node (n.), radial (adj.), radius (n.), rotate (v.), slotted (adj.)

Упражнение 2. Найдите перевод слов списка А в списке В.

A	B	A	B
отрезок	rod	встречаться, иметь место	watertight
винт	adjacent	накладка	buckling
обе стороны	glued joint	неограниченный	stiffen
усиливать	unrestricted	влиять	bent
вершина	occur	клеевое соединение	screw
изогнутый	cover plate	водонепроницаемый	apex
стержень	chord	потеря продольной устойчивости	either side
пояс балки	influence	примыкающий	length

Упражнение 3. Напишите предложения с каждым из перечисленных ниже слов:

cover n. - cover v.

near - nearly

Упражнение 4. Составьте план содержания текста B.