[Engineering Version] Daily Question 20180610

Thread Content

Which of the following statements about expansion joints is correct? ( ) A. The expansion joint foundation is buried underground; although it is less affected by temperature changes, it must be separated. B. The settlement joint disconnects all components from the foundation to the roof of the building. C. Generally, seismic joints should be provided with the foundation as the separation point. D. The above three slits cannot be set together. Answer: B 【Explanation】Since the foundation of expansion joints is buried underground, it is hardly affected by temperature changes, so the joints can remain connected. In addition to the roof, floor slabs, walls, and beams/columns needing to be completely independent in terms of structure and construction, the foundations as well must be entirely separate. During an earthquake, the lower part of a building is less affected by the quake; therefore, it is generally not necessary to disconnect the foundations at the seismic joints.