No abstract

According to the practical situation (loaded by the second time), nine pieces of prestressed concrete hollow slabs which had been reinforced with CFRP were experimented on. And symmetric load was putted on the three-point of the hollow slabs. In this paper, the effects of different pasting methods and quantity of CFRP on mechanical performance and reinforcement effect of prestressed concrete hollow slabs which were damaged in varying degrees were studied. And the ultimate bearing capacity, failure mode, types of cracks and load-deformation curves of test specimen after being reinforced was analyzed systematically. After contrasting and analyzing the trial value of prestressed concrete hollow slabs, a simple, economic and reasonable reinforcing program was obtained.

Relative humidity in hot-humid and cold-humid area in summer is high, the sun radiation intensity is low, and the existing building thermal stability condition basic research data is absence . Select the region typical residential building, the sun radiation, relative humidity, air temperature and surface temperature were measured and recorded; Test analysis shows that typical residential house in summer in the climate characteristics the typical average indoor temperature fluctuation in the cycle is 4.3 °C,fluctuations of temperature to a larger extent, and was obviously affected by such factors as orientations and envelope constructional detail.