Abstract:Abstract：So far

the reliability analysis of bolted connections is mainly aiming at the connection with a single bolt. However

all of the bolted connections in actual projects are composed with more than one bolt

which reliability analysis is few or none. For this issue

this paper established a model of its reliability analysis of bending and bearing capacity which is based on the code for design of timber structures (GB5005-2003) in China

and the corresponding analysis program is compiled

with applying the improved JC method which takes the corresponding influence of mutual random variables into account. According to numerous data analysis

it is presented that reliability index of bending and bearing capacity of bolted connections. When

the reliability index of multi-bolts connections and a single bolt connection is the same

which overall average value and coefficient of variation are 4.0023 and 0.0968; While

the overall average value and coefficient of variation of multi-bolts connections are 5.8681 and 0.1230

respectively; And when linearly changes among the range of this paper

the overall average value and coefficient of variation of multi-bolts connections are 4.15941 and 0.0893

respectively. The results presented in this paper will contribute to modify the current code for design of timber structures in China.