If the social security base in Lianyungang, Jiangsu is 11,500 yuan, the specific amount obtained mainly involves pension calculation. Here's a breakdown:

1. Basic pension: The formula is ​
   (local pension calculation base+local pension calculation base×average contribution index)÷×contribution years×1%
   . Suppose the local pension calculation base is ​
   x
   yuan, and the average contribution index is assumed to be 1 (if the contribution base of 11,500 yuan is at the average level of the local base), and the contribution years are ​
   y
   years. Then the basic pension = ​
   (x+x×)÷×y×1%=0.01xy
   yuan. For example, if the local pension calculation base ​
   x=
   yuan and the contribution years ​
   y=
   years, the basic pension = ​
   (+)÷××1%=
   yuan.

2. Personal account pension: The formula is the balance of the personal pension account​
   ÷
   the number of pension calculation months. The amount in the personal account is accumulated by the individual's contribution. The individual contribution rate for pension insurance is 8%, so the monthly individual contribution is ​
   ×8%=
   yuan. Assuming the contribution period is ​
   y
   years (12​
   y
   months), and the interest rate is ignored for simplicity, the balance of the personal account is ​
   ×y
   yuan. If retiring at 60 years old, the number of pension calculation months is 139. Then the personal account pension = ​
   ×y÷
   yuan. For example, if ​
   y=
   years, the balance of the personal account is ​
   ××=
   yuan, and the personal account pension = ​
   ÷≈2382.73
   yuan.

3. Transitional pension: This part is mainly for those with 视同缴费年限 (years of contribution deemed as paid). The calculation is more complex and varies by region. It is generally related to the local pension calculation base, the number of 视同缴费年限，and relevant coefficients. Since the relevant data in the question is not given, it is difficult to calculate accurately. For example, if the local transitional coefficient is 1.3%, and the number of 视同缴费年限 is ​
   z
   years, and the local pension calculation base is ​
   x
   yuan, the transitional pension = ​
   x×z×1.3%
   .

In general, the pension amount is the sum of the basic pension, personal account pension, and transitional pension (if applicable). When calculating specifically, it is necessary to accurately determine local data such as the pension calculation base, contribution years, and relevant coefficients.

社保计算涉及众多复杂因素，希望以上内容对你理解连云港社保基数 11500 对应的待遇有所帮助。若你还想了解社保其他方面的内容，比如不同险种在特定情况下的具体报销规则，欢迎随时提问。